Configuring Unicast Neighbors - Cisco ASR 9000 Series Routing Configuration Manual

Implementing EIGRP
DETAILED STEPS
Command or Action
Step 1
configure
Step 2 router eigrp as-number
Example:
RP/0/RSP0/CPU0:router(config)# router eigrp 100
Step 3 vrf vrf-name
Example:
RP/0/RSP0/CPU0:router(config-eigrp)# vrf vrf1
Step 4 address-family { ipv4 | ipv6 }
Example:
RP/0/RSP0/CPU0:router(config-eigrp-vrf)#
address-family ipv4
Step 5 interface type interface-path-id
Example:
RP/0/RSP0/CPU0:router(config-eigrp-vrf-af)#
interface gigabitEthernet 0/1/5/0
Step 6 authentication keychain keychain-name
Example:
RP/0/RSP0/CPU0:router(config-eigrp-vrf-af-if)#
authentication keychain
Step 7 commit

Configuring unicast neighbors

EIGRP typically broadcasts or multicasts routing updates. For security reasons, you can opt to configure static
neighbors in the EIGRP routing process, forcing EIGRP to communicate to specified neighbors using unicast.
When you specify a static neighbor relationship over a particular interface, EIGRP disables the processing of
multicast EIGRP packets on the specified interface. This ensures that EIGRP does not send nor process
received multicast EIGRP traffic on an interface which has a static neighbor defined under the EIGRP routing
process.
In cases where the neighbors are not adjacent, normal EIGRP peering mechanisms cannot be used to exchange
EIGRP information. In order to support this type of network, EIGRP provides the neighbor command, which
allows remote neighbors to be configured and sessions established though unicast packet transmission.
Cisco ASR 9000 Series Aggregation Services Router Routing Configuration Guide, Release 5.3.x
Configuring unicast neighbors
Purpose
Specifies the autonomous system number of the
routing process to configure an EIGRP routing
process.
Creates a VRF instance and enters VRF
configuration mode.
Enters a VRF address family configuration mode.
Configures the interface on which EIGRP runs.
Authenticates all EIGRP protocol traffic on the
interface, based on the MD5 algorithm.
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