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Implementing EIGRP on Cisco IOS XR Software
Information About Implementing EIGRP on Cisco IOS XR Software
RC-140
Cisco IOS XR Routing Configuration Guide
OL-14356-01
RP/0/RP0/CPU0:router(config)# router eigrp 100
RP/0/RP0/CPU0:router(config-eigrp)# vrf customer1
RP/0/RP0/CPU0:router(config-eigrp-vrf)# address-family ipv6
RP/0/RP0/CPU0:router(config-eigrp-vrf-af)#
Interface Configuration Mode
The following example shows how to enter interface configuration mode in IPv4 address family
configuration mode:
RP/0/RP0/CPU0:router# configuration
RP/0/RP0/CPU0:router(config)# router eigrp 100
RP/0/RP0/CPU0:router(config-eigrp)# address-family ipv4
RP/0/RP0/CPU0:router(config-eigrp-af)# interface POS0/3/0/0
RP/0/RP0/CPU0:router(config-eigrp-af-if)#
The following example shows how to enter interface configuration mode in IPv6 VRF configuration
mode:
RP/0/RP0/CPU0:router# configuration
RP/0/RP0/CPU0:router(config)# router eigrp 100
RP/0/RP0/CPU0:router(config-eigrp)# vrf customer1
RP/0/RP0/CPU0:router(config-eigrp-vrf)# address-family ipv6
RP/0/RP0/CPU0:router(config-eigrp-vrf-af)# interface POS0/5/0/0
RP/0/RP0/CPU0:router(config-eigrp-vrf-af-if)#
EIGRP Interfaces
EIGRP interfaces can be configured as either of the following types:
• Active—Advertises connected prefixes and forms adjacencies. This is the default type for interfaces.
• Passive—Advertises connected prefixes but does not form adjacencies. The passive command is
used to configure interfaces as passive. Passive interfaces should be used sparingly for important
prefixes, such as loopback addresses, that need to be injected into the EIGRP domain. If many
connected prefixes need to be advertised, then the redistribution of connected routes with the
appropriate policy should be used instead.
Redistribution for an EIGRP Process
Routes from other protocols can be redistributed into EIGRP. A route policy can be configured along
with the redistribute command. A metric is required, configured either through the default-metric
command or under the route policy configured with the redistribute command to import routes into
EIGRP.
A route policy allows the filtering of routes based on attributes such as the destination, origination
protocol, route type, route tag, and so on. When redistribution is configured under a VRF, EIGRP
retrieves extended communities attached to the route in the routing information base (RIB). The SoO is
used to filter out routing loops in the presence of MPSL VPN backdoor links.