nm-settings-ifcfg-rh man page

nm-settings-ifcfg-rh — Description of ifcfg-rh settings plugin

Description

NetworkManager is based on the concept of connection profiles that contain network configuration (see nm-settings(5) for details). The profiles can be stored in various formats. NetworkManager uses plugins for reading and writing the data. The plugins can be configured in NetworkManager.conf(5).

The ifcfg-rh plugin is used on the Fedora and Red Hat Enterprise Linux distributions to read/write configuration from/to the traditional /etc/sysconfig/network-scripts/ifcfg-* files. Each NetworkManager connection maps to one ifcfg-* file, with possible usage of keys-* for passwords, route-* for static IPv4 routes and route6-* for static IPv6 routes. The plugin currently supports reading and writing Ethernet, Wi-Fi, InfiniBand, VLAN, Bond, Bridge, and Team connections. Unsupported connection types (such as WWAN, PPPoE, VPN, or ADSL) are handled by keyfile plugin (nm-settings-keyfile(5)). The main reason for using ifcfg-rh plugin is the compatibility with legacy configurations for ifup and ifdown (initscripts).

File Format

The ifcfg-rh config format is a simple text file containing VARIABLE="value" lines. The format is described in sysconfig.txt of initscripts package. Note that the configuration files may be sourced by initscripts, so they must be valid shell scripts. That means, for instance, that # character can be used for comments, strings with spaces must be quoted, special characters must be escaped, etc.

Users can create or modify the ifcfg-rh connection files manually, even if that is not the recommended way of managing the profiles. However, if they choose to do that, they must inform NetworkManager about their changes (see monitor-connection-file in nm-settings(5), and nmcli con (re)load).

Some ifcfg-rh configuration examples:.

Simple DHCP ethernet configuration:
NAME=ethernet
UUID=1c4ddf70-01bf-46d6-b04f-47e842bd98da
TYPE=Ethernet
BOOTPROTO=dhcp
DEFROUTE=yes
PEERDNS=yes
PEERROUTES=yes
IPV4_FAILURE_FATAL=no
ONBOOT=yes

Simple ethernet configuration with static IP:
TYPE=Ethernet
BOOTPROTO=none
IPADDR=10.1.0.25
PREFIX=24
GATEWAY=10.1.0.1
DEFROUTE=yes
IPV4_FAILURE_FATAL=no
IPV6INIT=yes
IPV6_AUTOCONF=yes
IPV6_DEFROUTE=yes
IPV6_PEERDNS=yes
IPV6_PEERROUTES=yes
IPV6_FAILURE_FATAL=no
NAME=ethernet-em2
UUID=51bb3904-c0fc-4dfe-83b2-0a71e7928c13
DEVICE=em2
ONBOOT=yes

WPA2 Enterprise WLAN (TTLS with inner MSCHAPV2 authentication):
ESSID="CompanyWLAN"
MODE=Managed
KEY_MGMT=WPA-EAP
TYPE=Wireless
IEEE_8021X_EAP_METHODS=TTLS
IEEE_8021X_IDENTITY=joe
IEEE_8021X_PASSWORD_FLAGS=ask
IEEE_8021X_INNER_AUTH_METHODS=MSCHAPV2
IEEE_8021X_CA_CERT=/home/joe/.cert/company.crt
BOOTPROTO=dhcp
DEFROUTE=yes
PEERDNS=yes
PEERROUTES=yes
IPV4_FAILURE_FATAL=no
IPV6INIT=no
NAME=MyCompany
UUID=f79848ff-11a6-4810-9e1a-99039dea84c4
ONBOOT=yes

Bridge and bridge port configuration:
ifcfg-bridge:                                ifcfg-bridge-port:
NAME=bridge                                  NAME=bridge007-port-eth0
UUID=4be99ce0-c5b2-4764-8b77-ec226e440125    UUID=3ad56c4a-47e1-419b-b0d4-8ad86eb967a3
DEVICE=bridge007                             DEVICE=eth0
STP=yes                                      ONBOOT=yes
TYPE=Bridge                                  TYPE=Ethernet
BRIDGING_OPTS=priority=32768                 BRIDGE=bridge007
ONBOOT=yes
BOOTPROTO=dhcp

Bonding configuration:
ifcfg-BOND:                                  ifcfg-BOND-slave:
NAME=BOND                                    NAME=BOND-slave
UUID=b41888aa-924c-450c-b0f8-85a4f0a51b4a    UUID=9bb048e4-286a-4cc3-b104-007dbd20decb
DEVICE=bond100                               DEVICE=eth0
BONDING_OPTS="mode=balance-rr miimon=100"    ONBOOT=yes
TYPE=Bond                                    TYPE=Ethernet
BONDING_MASTER=yes                           MASTER=bond100
ONBOOT=yes                                   SLAVE=yes
BOOTPROTO=dhcp

Team and team port configuration:
ifcfg-my_team0:
DEVICE=team0
TEAM_CONFIG="{ \"device\": \"team0\", \"runner\": {\"name\": \"roundrobin\"}, \"ports\": {\"eth1\": {}, \"eth2\": {}} }"
DEVICETYPE=Team
BOOTPROTO=dhcp
NAME=team0-profile
UUID=1d3460a0-7b37-457f-a300-fe8d92da4807
ONBOOT=yes

ifcfg-my_team0_slave1:
NAME=team0-slave1
UUID=d5aed298-c567-4cc1-b808-6d38ecef9e64
DEVICE=eth1
ONBOOT=yes
TEAM_MASTER=team0
DEVICETYPE=TeamPort

ifcfg-my_team0_slave2:
NAME=team0-slave2
UUID=94e75f4e-e5ad-401c-8962-31e0ae5d2215
DEVICE=eth2
ONBOOT=yes
TEAM_MASTER=team0
DEVICETYPE=TeamPort

The UUID values in the config files must be unique. You can use uuidgen command line tool to generate such values. Alternatively, you can leave out UUID entirely. In that case NetworkManager will generate a UUID based on the file name.

Differences Against Initscripts

The main differences of NetworkManager ifcfg-rh plugin and traditional initscripts are:

NM_CONTROLLED=yes|no: NM_CONTROLLED is NetworkManager-specific variable used by NetworkManager for determining whether the device of the ifcfg file should be managed. NM_CONTROLLED=yes is supposed if the variable is not present in the file. Note that if you have more ifcfg files for a single device, NM_CONTROLLED=no in one of the files will cause the device not to be managed. The profile may not even be the active one.
New variables: NetworkManager has introduced some new variable, not present in initscripts, to be able to store data for its new features. The variables are marked as extensions in the tables below.

Semantic change of variables

NetworkManager had to slightly change the semantic for a few variables.

PEERDNS - initscripts interpret PEERDNS=no to mean "never touch resolv.conf". NetworkManager interprets it to say "never add automatic (DHCP, PPP, VPN, etc.) nameservers to resolv.conf".
ONBOOT - initscripts use ONBOOT=yes to mark the devices that are to be activated during boot. NetworkManager extents this to also mean that this profile can be used for auto-connecting at any time.
BOOTPROTO - NetworkManager supports traditional values none (static), dhcp. But it also allows additional values to enable new addressing methods. They are autoip for IPv4 link-local addressing using Avahi daemon and shared for connection sharing. When shared is used, NetworkManager assigns the interface 10.42.0.1, or it uses the first static address, if configured.
HWADDR - initscripts compare the currently set hardware address of a device, while NetworkManager considers the permanent one.

See the next section for detailed mapping of NetworkManager properties and ifcfg-rh variables. Variable names, format and usage differences in NetworkManager and initscripts are documented in the tables below.

Details

ifcfg-rh plugin variables marked with (+) are NetworkManager specific extensions not understood by traditional initscripts.

Table 1. 6lowpan setting

Property	Ifcfg-rh Variable	Default	Description

Table 2. 802-1x setting

Property	Ifcfg-rh Variable	Default	Description
eap	IEEE_8021X_EAP_METHODS(+)		EAP method for 802.1X authentication. Example: IEEE_8021X_EAP_METHODS=PEAP Allowed values: "LEAP", "PWD", "TLS", "PEAP", "TTLS", "FAST"
identity	IEEE_8021X_IDENTITY(+)		Identity for EAP authentication methods. Example: IEEE_8021X_IDENTITY=itsme
anonymous-identity	IEEE_8021X_ANON_IDENTITY(+)		Anonymous identity for EAP authentication methods.
pac-file	IEEE_8021X_PAC_FILE(+)		File with PAC (Protected Access Credential) for EAP-FAST. Example: IEEE_8021X_PAC_FILE=/home/joe/my-fast.pac
ca-cert	IEEE_8021X_CA_CERT(+)		CA certificate for EAP. Example: IEEE_8021X_CA_CERT=/home/joe/cacert.crt
ca-path	(none)		The property is not handled by ifcfg-rh plugin.
subject-match	IEEE_8021X_SUBJECT_MATCH(+)		Substring to match subject of server certificate against. Example: IEEE_8021X_SUBJECT_MATCH="Red Hat"
altsubject-matches	IEEE_8021X_ALTSUBJECT_MATCHES(+)		List of strings to be matched against the altSubjectName. Example: IEEE_8021X_ALTSUBJECT_MATCHES="s1.domain.cc"
domain-suffix-match	IEEE_8021X_DOMAIN_SUFFIX_MATCH(+)		Suffix to match domain of server certificate against.
client-cert	IEEE_8021X_CLIENT_CERT(+)		Client certificate for EAP. Example: IEEE_8021X_CLIENT_CERT=/home/joe/mycert.crt
phase1-peapver	IEEE_8021X_PEAP_VERSION(+)		Use to force a specific PEAP version. Allowed values: 0, 1
phase1-peaplabel	IEEE_8021X_PEAP_FORCE_NEW_LABEL(+)	no	Use to force the new PEAP label during key derivation. Allowed values: yes, no
phase1-fast-provisioning	IEEE_8021X_FAST_PROVISIONING(+)		Enable in-line provisioning of EAP-FAST credentials. Example: IEEE_8021X_FAST_PROVISIONING="allow-auth allow-unauth" Allowed values: space-separated list of these values [allow-auth, allow-unauth]
phase1-auth-flags	IEEE_8021X_PHASE1_AUTH_FLAGS(+)		Authentication flags for the supplicant Example: IEEE_8021X_PHASE1_AUTH_FLAGS="tls-1-0-disable tls-1-1-disable" Allowed values: space-separated list of authentication flags names
phase2-auth	IEEE_8021X_INNER_AUTH_METHODS(+)		Inner non-EAP authentication methods. IEEE_8021X_INNER_AUTH_METHODS can contain values both for 'phase2-auth' and 'phase2-autheap' properties. Example: IEEE_8021X_INNER_AUTH_METHODS=PAP Allowed values: "PAP", "CHAP", "MSCHAP", "MSCHAPV2", "GTC", "OTP", "MD5" and "TLS"
phase2-autheap	IEEE_8021X_INNER_AUTH_METHODS(+)		Inner EAP-based authentication methods. Note that IEEE_8021X_INNER_AUTH_METHODS is also used for 'phase2-auth' values. Example: IEEE_8021X_INNER_AUTH_METHODS="MSCHAPV2 EAP-TLS" Allowed values: "EAP-MD5", "EAP-MSCHAPV2", "EAP-GTC", "EAP-OTP" and "EAP-TLS"
phase2-subject-match	IEEE_8021X_PHASE2_SUBJECT_MATCH(+)		Substring to match subject of server certificate against. Example: IEEE_8021X_PHASE2_SUBJECT_MATCH="Red Hat"
phase2-altsubject-matches	IEEE_8021X_PHASE2_ALTSUBJECT_MATCHES(+)
phase2-domain-suffix-match	IEEE_8021X_PHASE2_DOMAIN_SUFFIX_MATCH(+)		Suffix to match domain of server certificate for phase 2 against.
phase2-client-cert	IEEE_8021X_INNER_CLIENT_CERT(+)		Client certificate for inner EAP method. Example: IEEE_8021X_INNER_CLIENT_CERT=/home/joe/mycert.crt
password	IEEE_8021X_PASSWORD(+)		UTF-8 encoded password used for EAP. It can also go to "key-" lookaside file, or it can be owned by a secret agent.
password-flags	IEEE_8021X_PASSWORD_FLAGS(+)		Password flags for IEEE_8021X_PASSWORD password. (see the section called “Secret flags” for _FLAGS values)
password-raw	IEEE_8021X_PASSWORD_RAW(+)		password used for EAP, encoded as a hexadecimal string. It can also go to "key-" lookaside file. Example: IEEE_8021X_PASSWORD_RAW=041c8320083aa4bf
password-raw-flags	(none)		The property is not handled by ifcfg-rh plugin.
private-key	IEEE_8021X_PRIVATE_KEY(+)		Private key for EAP-TLS. Example: IEEE_8021X_PRIVATE_KEY=/home/joe/mykey.p12
private-key-password	IEEE_8021X_PRIVATE_KEY_PASSWORD(+)		Password for IEEE_8021X_PRIVATE_KEY. It can also go to "key-" lookaside file, or it can be owned by a secret agent.
private-key-password-flags	IEEE_8021X_PRIVATE_KEY_PASSWORD_FLAGS(+)		Password flags for IEEE_8021X_PRIVATE_KEY_PASSWORD password. (see the section called “Secret flags” for _FLAGS values)
phase2-private-key	IEEE_8021X_INNER_PRIVATE_KEY(+)		Private key for inner authentication method for EAP-TLS.
phase2-private-key-password	IEEE_8021X_INNER_PRIVATE_KEY_PASSWORD(+)		Password for IEEE_8021X_INNER_PRIVATE_KEY. It can also go to "key-" lookaside file, or it can be owned by a secret agent.
phase2-private-key-password-flags	IEEE_8021X_INNER_PRIVATE_KEY_PASSWORD_FLAGS(+)		Password flags for IEEE_8021X_INNER_PRIVATE_KEY_PASSWORD password. (see the section called “Secret flags” for _FLAGS values)
pin	(none)		The property is not handled by ifcfg-rh plugin.
pin-flags	(none)		The property is not handled by ifcfg-rh plugin.
system-ca-certs	(none)		The property is not handled by ifcfg-rh plugin.
auth-timeout	IEEE_8021X_AUTH_TIMEOUT(+)	0	Timeout in seconds for the 802.1X authentication. Zero means the global default or 25.
optional	IEEE_8021X_OPTIONAL(+) default=no		whether the 802.1X authentication is optional

Table 3. bond setting

Property	Ifcfg-rh Variable	Default	Description
options	BONDING_OPTS		Bonding options. Example: BONDING_OPTS="miimon=100 mode=broadcast"

Table 4. bridge-port setting

Property	Ifcfg-rh Variable	Default	Description
priority	BRIDGING_OPTS: priority=	32	STP priority. Allowed values: 0 - 63
path-cost	BRIDGING_OPTS: path_cost=	100	STP cost. Allowed values: 1 - 65535
hairpin-mode	BRIDGING_OPTS: hairpin_mode=	yes	Hairpin mode of the bridge port.
vlans	BRIDGE_PORT_VLANS		List of VLANs on the bridge port Example: BRIDGE_PORT_VLANS="1 pvid untagged,20,300-400 untagged"

Table 5. bridge setting

Property	Ifcfg-rh Variable	Default	Description
mac-address	BRIDGE_MACADDR(+)		MAC address of the bridge. Note that this requires a recent kernel support, originally introduced in 3.15 upstream kernel) BRIDGE_MACADDR for bridges is an NM extension.
stp	STP	no	Span tree protocol participation.
priority	BRIDGING_OPTS: priority=	32768	STP priority. Allowed values: 0 - 32768
forward-delay	DELAY	15	STP forwarding delay. Allowed values: 2 - 30
hello-time	BRIDGING_OPTS: hello_time=	2	STP hello time. Allowed values: 1 - 10
max-age	BRIDGING_OPTS: max_age=	20	STP maximum message age. Allowed values: 6 - 40
ageing-time	BRIDGING_OPTS: ageing_time=	300	Ethernet MAC ageing time. Allowed values: 0 - 1000000
multicast-snooping	BRIDGING_OPTS: multicast_snooping=	1	IGMP snooping support. Allowed values: 0 or 1
vlan-filtering	BRIDGING_OPTS: vlan_filtering=	0	VLAN filtering support. Allowed values: 0 or 1
vlan-default-pvid	BRIDGING_OPTS: default_pvid=	1	default VLAN PVID. Allowed values: 0 - 4094
vlans	BRIDGE_VLANS		List of VLANs on the bridge Example: BRIDGE_VLANS="1 pvid untagged,20,300-400 untagged"

Table 6. connection setting

Property	Ifcfg-rh Variable	Default	Description
id	NAME(+)		User friendly name for the connection profile.
uuid	UUID(+)		UUID for the connection profile. When missing, NetworkManager creates the UUID itself (by hashing the filename).
stable-id	STABLE_ID(+)		Token to generate stable IDs.
interface-name	DEVICE		Interface name of the device this profile is bound to. The variable can be left out when the profile should apply for more devices. Note that DEVICE can be required for some connection types.
type	TYPE (DEVICETYPE, DEVICE)		Base type of the connection. DEVICETYPE is used for teaming connections. Example: TYPE=Ethernet; TYPE=Bond; TYPE=Bridge; DEVICETYPE=TeamPort Allowed values: Ethernet, Wireless, InfiniBand, Bridge, Bond, Vlan, Team, TeamPort
permissions	USERS(+)		Restrict to certain users the access to this connection, and allow the connection to be active only when at least one of the specified users is logged into an active session. Example: USERS="joe bob"
autoconnect	ONBOOT	yes	Whether the connection should be autoconnected (not only while booting).
autoconnect-priority	AUTOCONNECT_PRIORITY(+)	0	Connection priority for automatic activation. Connections with higher numbers are preferred when selecting profiles for automatic activation. Example: AUTOCONNECT_PRIORITY=20 Allowed values: -999 to 999
autoconnect-retries	AUTOCONNECT_RETRIES(+)		The number of times a connection should be autoactivated before giving up and switching to the next one. Example: AUTOCONNECT_RETRIES=1 Allowed values: -1 (use global default), 0 (forever) or a positive value
multi-connect	MULTI_CONNECT(+)		whether the profile can be active on multiple devices at a given moment. The values are numbers corresponding to #NMConnectionMultiConnect enum. Example: ZONE=3
zone	ZONE(+)		Trust level of this connection. The string is usually used for a firewall. Example: ZONE=Work
master	MASTER, MASTER_UUID, TEAM_MASTER, TEAM_MASTER_UUID, BRIDGE, BRIDGE_UUID		Reference to master connection. The variable used depends on the connection type and the value. In general, if the _UUID variant is present, the variant without _UUID is ignored. NetworkManager attempts to write both for compatibility with legacy tooling.
slave-type	MASTER, MASTER_UUID, TEAM_MASTER, TEAM_MASTER_UUID, DEVICETYPE, BRIDGE, BRIDGE_UUID		Slave type doesn't map directly to a variable, but it is recognized using different variables. MASTER and MASTER_UUID for bonding, TEAM_MASTER, TEAM_MASTER_UUID and DEVICETYPE for teaming, BRIDGE and BRIDGE_UUID for bridging.
autoconnect-slaves	AUTOCONNECT_SLAVES(+)	missing variable means global default	Whether slaves of this connection should be auto-connected when this connection is activated.
secondaries	SECONDARY_UUIDS(+)		UUID of VPN connections that should be activated together with this connection.
gateway-ping-timeout	GATEWAY_PING_TIMEOUT(+)	0	If greater than zero, the IP connectivity will be checked by pinging the gateway and waiting for the specified timeout (in seconds). Example: GATEWAY_PING_TIMEOUT=5
metered	CONNECTION_METERED(+)		Whether the device is metered Example: CONNECTION_METERED=yes Allowed values: yes,no,unknown
lldp	LLDP(+)	missing variable means global default	whether LLDP is enabled for the connection Example: LLDP=no Allowed values: boolean value or 'rx'
auth-retries	AUTH_RETRIES(+)	0	Number of retries for authentication.
mdns	MDNS(+)	missing variable means global default	Whether or not mDNS is enabled for the connection Example: MDNS=yes Allowed values: yes,no,resolve
llmnr	LLMNR(+)	missing variable means global default	Whether or not LLMNR is enabled for the connection Example: LLMNR=yes Allowed values: yes,no,resolve
wait-device-timeout	DEVTIMEOUT(+)		for initscripts compatibility, this variable must be a whole integer. If necessary, NetworkManager stores also a fractional component for the milliseconds. Example: DEVTIMEOUT=5 Allowed values: timeout in seconds.

Table 7. dcb setting

Property	Ifcfg-rh Variable	Default	Description
app-fcoe-flags	DCB_APP_FCOE_ENABLE, DCB_APP_FCOE_ADVERTISE, DCB_APP_FCOE_WILLING	no	FCOE flags. Example: DCB_APP_FCOE_ENABLE=yes DCB_APP_FCOE_ADVERTISE=yes
app-fcoe-priority	DCB_APP_FCOE_PRIORITY		Priority of FCoE frames. Allowed values: 0 - 7
app-fcoe-mode	DCB_APP_FCOE_MODE	fabric	FCoE controller mode. Allowed values: fabric, vn2vn
app-iscsi-flags	DCB_APP_ISCSI_ENABLE, DCB_APP_ISCSI_ADVERTISE, DCB_APP_ISCSI_WILLING	no	iSCSI flags.
app-iscsi-priority	DCB_APP_ISCSI_PRIORITY		Priority of iSCSI frames. Allowed values: 0 - 7
app-fip-flags	DCB_APP_FIP_ENABLE, DCB_APP_FIP_ADVERTISE, DCB_APP_FIP_WILLING	no	FIP flags.
app-fip-priority	DCB_APP_FIP_PRIORITY		Priority of FIP frames. Allowed values: 0 - 7
priority-flow-control-flags	DCB_PFC_ENABLE, DCB_PFC_ADVERTISE, DCB_PFC_WILLING	no	Priority flow control flags.
priority-flow-control	DCB_PFC_UP		Priority flow control values. String of 8 "0" and "1", where "0". means "do not transmit priority pause", "1" means "transmit pause". Example: DCB_PFC_UP=01101110
priority-group-flags	DCB_PG_ENABLE, DCB_PG_ADVERTISE, DCB_PG_WILLING	no	Priority groups flags.
priority-group-id	DCB_PG_ID		Priority groups values. String of eight priorities (0 - 7) or "f" (unrestricted). Example: DCB_PG_ID=1205f173
priority-group-bandwidth	DCB_PG_PCT		Priority groups values. Eight bandwidths (in percent), separated with commas. Example: DCB_PG_PCT=10,5,10,15,10,10,10,30
priority-bandwidth	DCB_PG_UPPCT		Priority values. Eight bandwidths (in percent), separated with commas. The sum of the numbers must be 100. Example: DCB_PG_UPPCT=7,13,10,10,15,15,10,20
priority-strict-bandwidth	DCB_PG_STRICT		Priority values. String of eight "0" or "1", where "0" means "may not utilize all bandwidth", "1" means "may utilize all bandwidth". Example: DCB_PG_STRICT=01101110
priority-traffic-class	DCB_PG_UP2TC		Priority values. String of eight traffic class values (0 - 7). Example: DCB_PG_UP2TC=01623701

All DCB related configuration is a NetworkManager extension. DCB=yes must be used explicitly to enable DCB so that the rest of the DCB_* variables can apply.

Table 8. ethtool setting

Property	Ifcfg-rh Variable	Default	Description

Table 9. infiniband setting

Property	Ifcfg-rh Variable	Default	Description
mac-address	HWADDR		IBoIP 20-byte hardware address of the device (in traditional hex-digits-and-colons notation). Note that for initscripts this is the current MAC address of the device as found during ifup. For NetworkManager this is the permanent MAC address. Or in case no permanent MAC address exists, the MAC address initially configured on the device. Example: HWADDR=01:02:03:04:05:06:07:08:09:0A:01:02:03:04:05:06:07:08:09:11
mtu	MTU		MTU of the interface.
transport-mode	CONNECTED_MODE	CONNECTED_MODE=no	CONNECTED_MODE=yes for "connected" mode, CONNECTED_MODE=no for "datagram" mode
p-key	PKEY_ID (and PKEY=yes)	PKEY=no	InfiniBand P_Key. The value can be a hex number prefixed with "0x" or a decimal number. When PKEY_ID is specified, PHYSDEV and DEVICE also must be specified. Example: PKEY=yes PKEY_ID=2 PHYSDEV=mlx4_ib0 DEVICE=mlx4_ib0.8002
parent	PHYSDEV (PKEY=yes)	PKEY=no	InfiniBand parent device. Example: PHYSDEV=ib0

Table 10. ipv4 setting

Property	Ifcfg-rh Variable	Default	Description
method	BOOTPROTO	none	Method used for IPv4 protocol configuration. Allowed values: none, dhcp (bootp), static, ibft, autoip, shared
dns	DNS1, DNS2, ...		List of DNS servers. Even if NetworkManager supports many DNS servers, initscripts and resolver only care about the first three, usually. Example: DNS1=1.2.3.4 DNS2=10.0.0.254 DNS3=8.8.8.8
dns-search	DOMAIN		List of DNS search domains.
addresses	IPADDR, PREFIX, IPADDR1, PREFIX1, ...		List of static IP addresses. Example: IPADDR=10.5.5.23 PREFIX=24 IPADDR1=1.1.1.2 PREFIX1=16
gateway	GATEWAY		Gateway IP address. Example: GATEWAY=10.5.5.1
routes	ADDRESS1, NETMASK1, GATEWAY1, METRIC1, OPTIONS1, ...		List of static routes. They are not stored in ifcfg-* file, but in route-* file instead.
ignore-auto-routes	PEERROUTES(+)	yes	PEERROUTES has the opposite meaning as 'ignore-auto-routes' property.
ignore-auto-dns	PEERDNS	yes	PEERDNS has the opposite meaning as 'ignore-auto-dns' property.
dhcp-send-hostname	DHCP_SEND_HOSTNAME(+)	yes	Whether DHCP_HOSTNAME should be sent to the DHCP server.
dhcp-hostname	DHCP_HOSTNAME		Hostname to send to the DHCP server. When both DHCP_HOSTNAME and DHCP_FQDN are specified only the latter is used.
never-default	DEFROUTE (GATEWAYDEV in /etc/sysconfig/network)	yes	DEFROUTE=no tells NetworkManager that this connection should not be assigned the default route. DEFROUTE has the opposite meaning as 'never-default' property.
may-fail	IPV4_FAILURE_FATAL(+)	no	IPV4_FAILURE_FATAL has the opposite meaning as 'may-fail' property.
route-metric	IPV4_ROUTE_METRIC(+)	-1	IPV4_ROUTE_METRIC is the default IPv4 metric for routes on this connection. If set to -1, a default metric based on the device type is used.
route-table	IPV4_ROUTE_TABLE(+)	0	IPV4_ROUTE_TABLE enables policy-routing and sets the default routing table.
dns-options	RES_OPTIONS(+)		List of DNS options to be added to /etc/resolv.conf Example: RES_OPTIONS=ndots:2 timeout:3
dns-priority	IPV4_DNS_PRIORITY(+)	0	The priority for DNS servers of this connection. Lower values have higher priority. If zero, the default value will be used (50 for VPNs, 100 for other connections). A negative value prevents DNS from other connections with greater values to be used. Example: IPV4_DNS_PRIORITY=20
dhcp-client-id	DHCP_CLIENT_ID(+)		A string sent to the DHCP server to identify the local machine. A binary value can be specified using hex notation ('aa:bb:cc'). Example: DHCP_CLIENT_ID=ax-srv-1; DHCP_CLIENT_ID=01:44:44:44:44:44:44
dad-timeout	ACD_TIMEOUT(+), ARPING_WAIT	missing variable means global default (config override or zero)	Timeout (in milliseconds for ACD_TIMEOUT or in seconds for ARPING_WAIT) for address conflict detection before configuring IPv4 addresses. 0 turns off the ACD completely, -1 means default value. Example: ACD_TIMEOUT=2000 or ARPING_WAIT=2
dhcp-timeout	IPV4_DHCP_TIMEOUT(+)		A timeout after which the DHCP transaction fails in case of no response. Example: IPV4_DHCP_TIMEOUT=10
dhcp-fqdn	DHCP_FQDN		FQDN to send to the DHCP server. When both DHCP_HOSTNAME and DHCP_FQDN are specified only the latter is used. Example: DHCP_FQDN=foo.bar.com

Table 11. ipv6 setting

Property	Ifcfg-rh Variable	Default	Description
method	IPV6INIT, IPV6FORWARDING, IPV6_AUTOCONF, DHCPV6C, IPV6_DISABLED	IPV6INIT=yes; IPV6FORWARDING=no; IPV6_AUTOCONF=!IPV6FORWARDING, DHCPV6=no	Method used for IPv6 protocol configuration. ignore ~ IPV6INIT=no; auto ~ IPV6_AUTOCONF=yes; dhcp ~ IPV6_AUTOCONF=no and DHCPV6C=yes; disabled ~ IPV6_DISABLED=yes
dns	DNS1, DNS2, ...		List of DNS servers. NetworkManager uses the variables both for IPv4 and IPv6.
dns-search	IPV6_DOMAIN(+)		List of DNS search domains.
addresses	IPV6ADDR, IPV6ADDR_SECONDARIES		List of static IP addresses. Example: IPV6ADDR=ab12:9876::1 IPV6ADDR_SECONDARIES="ab12:9876::2 ab12:9876::3"
gateway	IPV6_DEFAULTGW		Gateway IP address. Example: IPV6_DEFAULTGW=abbe::1
routes	(none)		List of static routes. They are not stored in ifcfg-* file, but in route6-* file instead in the form of command line for 'ip route add'.
ignore-auto-routes	IPV6_PEERROUTES(+)	yes	IPV6_PEERROUTES has the opposite meaning as 'ignore-auto-routes' property.
ignore-auto-dns	IPV6_PEERDNS(+)	yes	IPV6_PEERDNS has the opposite meaning as 'ignore-auto-dns' property.
dhcp-hostname	DHCPV6_HOSTNAME		Hostname to send the DHCP server.
dhcp-timeout	IPV6_DHCP_TIMEOUT(+)		A timeout after which the DHCP transaction fails in case of no response. Example: IPV6_DHCP_TIMEOUT=10
never-default	IPV6_DEFROUTE(+), (and IPV6_DEFAULTGW, IPV6_DEFAULTDEV in /etc/sysconfig/network)	IPV6_DEFROUTE=yes (when no variable specified)	IPV6_DEFROUTE=no tells NetworkManager that this connection should not be assigned the default IPv6 route. IPV6_DEFROUTE has the opposite meaning as 'never-default' property. Example: DHCPV6_HOSTNAME_FLAGS=5 */
may-fail	IPV6_FAILURE_FATAL(+)	no	IPV6_FAILURE_FATAL has the opposite meaning as 'may-fail' property.
route-metric	IPV6_ROUTE_METRIC(+)	-1	IPV6_ROUTE_METRIC is the default IPv6 metric for routes on this connection. If set to -1, a default metric based on the device type is used.
route-table	IPV6_ROUTE_TABLE(+)	0	IPV6_ROUTE_TABLE enables policy-routing and sets the default routing table.
dns-priority	IPV6_DNS_PRIORITY(+)	0	The priority for DNS servers of this connection. Lower values have higher priority. If zero, the default value will be used (50 for VPNs, 100 for other connections). A negative value prevents DNS from other connections with greater values to be used. Example: IPV6_DNS_PRIORITY=20
dns-options	IPV6_RES_OPTIONS(+)		List of DNS options to be added to /etc/resolv.conf Example: IPV6_RES_OPTIONS=ndots:2 timeout:3
ip6-privacy	IPV6_PRIVACY, IPV6_PRIVACY_PREFER_PUBLIC_IP(+)	no	Configure IPv6 Privacy Extensions for SLAAC (RFC4941). Example: IPV6_PRIVACY=rfc3041 IPV6_PRIVACY_PREFER_PUBLIC_IP=yes Allowed values: IPV6_PRIVACY: no, yes (rfc3041 or rfc4941); IPV6_PRIVACY_PREFER_PUBLIC_IP: yes, no
addr-gen-mode	IPV6_ADDR_GEN_MODE	eui64	Configure IPv6 Stable Privacy addressing for SLAAC (RFC7217). Example: IPV6_ADDR_GEN_MODE=stable-privacy Allowed values: IPV6_ADDR_GEN_MODE: eui64, stable-privacy
token	IPV6_TOKEN		The IPv6 tokenized interface identifier token Example: IPV6_TOKEN=::53
dhcp-timeout	IPV6_RA_TIMEOUT(+)		A timeout for waiting Router Advertisements in seconds. Example: IPV6_RA_TIMEOUT=10
dhcp-duid	DHCPV6_DUID(+)		A string sent to the DHCPv6 server to identify the local machine. Apart from the special values "lease", "stable-llt", "stable-ll", "stable-uuid", "llt" and "ll" a binary value in hex format is expected. An hex string where each octet is separated by a colon is also accepted. Example: DHCPV6_DUID=LL; DHCPV6_DUID=0301deadbeef0001; DHCPV6_DUID=03:01:de:ad:be:ef:00:01

Table 12. match setting

Property	Ifcfg-rh Variable	Default	Description

Table 13. ovs-bridge setting

Property	Ifcfg-rh Variable	Default	Description

Table 14. ovs-dpdk setting

Property	Ifcfg-rh Variable	Default	Description

Table 15. ovs-interface setting

Property	Ifcfg-rh Variable	Default	Description

Table 16. ovs-patch setting

Property	Ifcfg-rh Variable	Default	Description

Table 17. ovs-port setting

Property	Ifcfg-rh Variable	Default	Description

Table 18. proxy setting

Property	Ifcfg-rh Variable	Default	Description
method	PROXY_METHOD(+)	none	Method for proxy configuration. For "auto", WPAD is used for proxy configuration, or set the PAC file via PAC_URL or PAC_SCRIPT. Allowed values: none, auto
browser-only	BROWSER_ONLY(+)	no	Whether the proxy configuration is for browser only.
pac-url	PAC_URL(+)		URL for PAC file. Example: PAC_URL=http://wpad.mycompany.com/wpad.dat
pac-script	PAC_SCRIPT(+)		Path of the PAC script. Example: PAC_SCRIPT=/home/joe/proxy.pac

Table 19. sriov setting

Property	Ifcfg-rh Variable	Default	Description
total-vfs	SRIOV_TOTAL_VFS(+)		The total number of virtual functions to create Example: SRIOV_TOTAL_VFS=16
vfs	SRIOV_VF1(+), SRIOV_VF2(+), ...		SR-IOV virtual function descriptors Example: SRIOV_VF10="mac=00:11:22:33:44:55", ...
autoprobe-drivers	SRIOV_AUTOPROBE_DRIVERS(+)	missing variable means global default	Whether to autoprobe virtual functions by a compatible driver Example: SRIOV_AUTOPROBE_DRIVERS=0,1

Table 20. tc setting

Property	Ifcfg-rh Variable	Default	Description
qdiscs	QDISC1(+), QDISC2(+), ...		Queueing disciplines Example: QDISC1=ingress, QDISC2="root handle 1234: fq_codel"
qdiscs	FILTER1(+), FILTER2(+), ...		Traffic filters Example: FILTER1="parent ffff: matchall action simple sdata Input", ...

Table 21. team-port setting

Property	Ifcfg-rh Variable	Default	Description
config	TEAM_PORT_CONFIG		Team port configuration in JSON. See man teamd.conf for details.

Table 22. team setting

Property	Ifcfg-rh Variable	Default	Description
config	TEAM_CONFIG		Team configuration in JSON. See man teamd.conf for details.

Table 23. user setting

Property	Ifcfg-rh Variable	Default	Description
data	NM_USER_*		each key/value pair is stored as a separate variable with name composed by concatenating NM_USER_ with the encoded key. The key is encoded by substituting lowercase letters with uppercase and prepending uppercase letters with an underscore. A dot is encoded as a double underscore. Remaining characters are encoded as underscore followed by a 3 digit octal representation of the character. Example: NM_USER_FOO__BAR=something

Table 24. vlan setting

Property	Ifcfg-rh Variable	Description
parent	DEVICE or PHYSDEV	Parent interface of the VLAN.
id	VLAN_ID or DEVICE	VLAN identifier.
flags	GVRP, MVRP, VLAN_FLAGS	VLAN flags. Allowed values: "yes or "no" for GVRP and MVRP; "LOOSE_BINDING" and "NO_REORDER_HDR" for VLAN_FLAGS
ingress-priority-map	VLAN_INGRESS_PRIORITY_MAP	Ingress priority mapping. Example: VLAN_INGRESS_PRIORITY_MAP=4:2,3:5
egress-priority-map	VLAN_EGRESS_PRIORITY_MAP	Egress priority mapping. Example: VLAN_EGRESS_PRIORITY_MAP=5:4,4:1,3:7
interface-name	PHYSDEV and VLAN_ID, or DEVICE	VLAN interface name. If all variables are set, parent device from PHYSDEV takes precedence over DEVICE, but VLAN id from DEVICE takes precedence over VLAN_ID. Example: PHYSDEV=eth0, VLAN_ID=12; or DEVICE=eth0.12

Table 25. wifi-p2p setting

Property	Ifcfg-rh Variable	Default	Description

Table 26. 802-3-ethernet setting

Property	Ifcfg-rh Variable	Description
port	(none)	The property is not saved by the plugin.
speed	ETHTOOL_OPTS	Fixed speed for the ethernet link. It is added as "speed" parameter in the ETHTOOL_OPTS variable.
duplex	ETHTOOL_OPTS	Fixed duplex mode for the ethernet link. It is added as "duplex" parameter in the ETHOOL_OPTS variable.
auto-negotiate	ETHTOOL_OPTS	Whether link speed and duplex autonegotiation is enabled. It is not saved only if disabled and no values are provided for the "speed" and "duplex" parameters (skips link configuration).
mac-address	HWADDR	Hardware address of the device in traditional hex-digits-and-colons notation (e.g. 00:22:68:14:5A:05). Note that for initscripts this is the current MAC address of the device as found during ifup. For NetworkManager this is the permanent MAC address. Or in case no permanent MAC address exists, the MAC address initially configured on the device.
cloned-mac-address	MACADDR	Cloned (spoofed) MAC address in traditional hex-digits-and-colons notation (e.g. 00:22:68:14:5A:99).
generate-mac-address-mask	GENERATE_MAC_ADDRESS_MASK(+)	the MAC address mask for generating randomized and stable cloned-mac-address.
mac-address-blacklist	HWADDR_BLACKLIST(+)	It denies usage of the connection for any device whose address is listed. Example: HWADDR_BLACKLIST="00:22:68:11:69:08 00:11:22:11:44:55"
mtu	MTU	MTU of the interface.
s390-subchannels	SUBCHANNELS	Subchannels for IBM S390 hosts. Example: SUBCHANNELS=0.0.b00a,0.0.b00b,0.0.b00c
s390-nettype	NETTYPE	Network type of the S390 host. Example: NETTYPE=qeth Allowed values: "qeth", "lcs" or "ctc"
s390-options	OPTIONS and PORTNAME, CTCPROTO,	S390 device options. All options go to OPTIONS, except for "portname" and "ctcprot" that have their own variables.

Table 27. wireguard setting

Property	Ifcfg-rh Variable	Default	Description

Table 28. 802-11-wireless-security setting

Property	Ifcfg-rh Variable	Default	Description
key-mgmt	KEY_MGMT(+)		Key management menthod. Allowed values: IEEE8021X, WPA-PSK, WPA-EAP
wep-tx-keyidx	DEFAULTKEY	1	Index of active WEP key. Allowed values: 1, 2, 3, 4
auth-alg	SECURITYMODE(+)		Authentication algorithm for WEP. Allowed values: restricted, open, leap
proto	WPA_ALLOW_WPA(+), WPA_ALLOW_WPA2(+)	no	Allowed WPA protocols, WPA and WPA2 (RSN). Allowed values: yes, no
pairwise	CIPHER_PAIRWISE(+)		Restrict pairwise encryption algorithms, specified as a space separated list. Allowed values: CCMP, TKIP
group	CIPHER_GROUP(+)		Restrict group/broadcast encryption algorithms, specified as a space separated list. Allowed values: CCMP, TKIP, WEP40, WEP104
pmf	PMF(+)		Enables or disables PMF (802.11w) Example: PMF=required Allowed values: default, disable, optional, required
leap-username	IEEE_8021X_IDENTITY(+)		Login name for LEAP.
wep-key0	KEY1, KEY_PASSPHRASE1(+)		The first WEP key (used in most networks). See also DEFAULTKEY for key index.
wep-key1	KEY2, KEY_PASSPHRASE2(+)		WEP key with index 1. See also DEFAULTKEY for key index.
wep-key2	KEY3, KEY_PASSPHRASE3(+)		WEP key with index 2. See also DEFAULTKEY for key index.
wep-key3	KEY4, KEY_PASSPHRASE4(+)		WEP key with index 3. See also DEFAULTKEY for key index.
wep-key-flags	WEP_KEY_FLAGS(+)		Password flags for KEY<i>, KEY_PASSPHRASE<i> password. (see the section called “Secret flags” for _FLAGS values)
psk	WPA_PSK		Pre-Shared-Key for WPA networks.
psk-flags	WPA_PSK_FLAGS(+)		Password flags for WPA_PSK_FLAGS. (see the section called “Secret flags” for _FLAGS values) Example: WPA_PSK_FLAGS=user
leap-password	IEEE_8021X_PASSWORD(+)		Password for LEAP. It can also go to "key-" lookaside file, or it can be owned by a secret agent.
leap-password-flags	IEEE_8021X_PASSWORD_FLAGS(+)		Password flags for IEEE_8021X_PASSWORD_FLAGS. (see the section called “Secret flags” for _FLAGS values)
wep-key-type	KEY<i> or KEY_PASSPHRASE<i>(+); KEY_TYPE(+)		KEY is used for "key" type (10 or 26 hexadecimal characters, or 5 or 13 character string prefixed with "s:"). KEY_PASSPHRASE is used for WEP passphrases. KEY_TYPE specifies the key type and can be either 'key' or 'passphrase'. KEY_TYPE is redundant and can be omitted. Example: KEY1=s:ahoj, KEY1=0a1c45bc02, KEY_PASSPHRASE1=mysupersecretkey
wps-method	WPS_METHOD		Used to control the WPS methods to be used Valid values are "default", "auto", "disabled", "pin" and "pbc". If omitted, whatver the AP announces is used. Example: WPS_METHOD=disabled, WPS_METHOD="pin pbc"
fils	FILS(+)		Enables or disables FILS (802.11ai) Example: FILS=required Allowed values: default, disable, optional, required

Table 29. 802-11-wireless setting

Property	Ifcfg-rh Variable	Description
ssid	ESSID	SSID of Wi-Fi network. Example: ESSID="Quick Net"
mode	MODE	Wi-Fi network mode. Allowed values: Ad-Hoc, Managed (Auto) [case insensitive]
band	BAND(+)	BAND alone is honored, but CHANNEL overrides BAND since it implies a band. Example: BAND=bg Allowed values: a, bg
channel	CHANNEL	Channel used for the Wi-Fi communication. Channels greater than 14 mean "a" band, otherwise the band is "bg". Example: CHANNEL=6
bssid	BSSID(+)	Restricts association only to a single AP. Example: BSSID=00:1E:BD:64:83:21
rate	(none)	This property is not handled by ifcfg-rh plugin.
tx-power	(none)	This property is not handled by ifcfg-rh plugin.
mac-address	HWADDR	Hardware address of the device in traditional hex-digits-and-colons notation (e.g. 00:22:68:14:5A:05). Note that for initscripts this is the current MAC address of the device as found during ifup. For NetworkManager this is the permanent MAC address. Or in case no permanent MAC address exists, the MAC address initially configured on the device.
cloned-mac-address	MACADDR	Cloned (spoofed) MAC address in traditional hex-digits-and-colons notation (e.g. 00:22:68:14:5A:99).
generate-mac-address-mask	GENERATE_MAC_ADDRESS_MASK(+)	the MAC address mask for generating randomized and stable cloned-mac-address.
mac-address-blacklist	HWADDR_BLACKLIST(+)	It denies usage of the connection for any device whose address is listed.
seen-bssids	(none)	This property is not handled by ifcfg-rh plugin.
mtu	MTU	MTU of the wireless interface.
hidden	SSID_HIDDEN(+)	Whether the network hides the SSID.
powersave	POWERSAVE(+)	Enables or disables Wi-Fi power saving. Example: POWERSAVE=enable Allowed values: default, ignore, enable, disable
mac-address-randomization	MAC_ADDRESS_RANDOMIZATION(+)	Enables or disables Wi-Fi MAC address randomization. Example: MAC_ADDRESS_RANDOMIZATION=always Allowed values: default, never, always
security	(none)	This property is deprecated and not handled by ifcfg-rh-plugin.

Table 30. wpan setting

Property	Ifcfg-rh Variable	Default	Description

The following settings are not supported by ifcfg-rh plugin:

802-11-olpc-mesh, adsl, bluetooth, cdma, dummy, generic, gsm, ip-tunnel, macsec, macvlan, ppp, pppoe, serial, tun, vpn, vxlan, wimax

Secret flags

Each secret property in a NetworkManager setting has an associated flags property that describes how to handle that secret. In the fcfg-rh plugin variables for secret flags have a _FLAGS suffix. The variables contain one or more of the following values (space separated). Missing (or empty) *_FLAGS variable means that the password is owned by NetworkManager.

user - a user-session secret agent is responsible for providing and storing this secret; when it is required, agents will be asked to provide it.
ask - the associated password is not saved but it will be requested from the user each time it is required.
unused - in some situations it cannot be automatically determined that a secret is required or not. This flag hints that the secret is not required and should not be requested from the user.

Files

/etc/sysconfig/network-scripts/ifcfg-*

/etc/sysconfig/network-scripts/keys-*

/etc/sysconfig/network-scripts/route-*

/etc/sysconfig/network-scripts/route6-*

/usr/share/doc/initscripts/sysconfig.txt

Referenced By

NetworkManager.conf(5), nm-settings-keyfile(5).

NetworkManager 1.22.10 Configuration