You can use the EIGRPv6 passive-interface command to control the advertisement of routing information.
The command enables the to stop routing updates over some interfaces while it allows updates to be exchanged normally over other interfaces.
How to Configure EIGRP Passive Interface.
We use the topology below as example.
Before you start, make sure ipv6 routing is been enabled on your router interface. Use the following command if not:
To enable an EIGRP for IPv6 routing configuration process, use the command ipv6 router eigrp 22, where AS number is denoted as 22.
HQ(config)# ipv6 router eigrp 22
HQ(config-rtr)# passive-interface GI0/0
HQ(config-rtr)# passive-interface Gi0/1
The configuration above enable the router to stop the exchange of hello packets between routers which will result in the loss of a neighbor relationship.
Therefore, it is only used on interfaces where no routers are connected.
This stops not only routing updates from being advertised, but it also suppresses incoming routing updates.
Use the show ipv6 protocols command to verify your configuration.
HQ#show ipv6 protocols
IPv6 Routing Protocol is “ND”
IPv6 Routing Protocol is “connected”
IPv6 Routing Protocol is “eigrp 22”
EIGRP-IPv6 Protocol for AS(22)
Metric weight K1=1, K2=0, K3=1, K4=0, K5=0
NSF-aware route hold timer is 240
Topology : 0 (base)
Active Timer: 3 min
Distance: internal 90 external 170
Maximum path: 16
Maximum hopcount 22
Maximum metric variance 1