These are just some notes about the differences between EIGRP for IPV4 and EIGRP for IPv6
A more detailed post on configuration will follow.
- As with OSPFv3 and RIPng EIGRP advertises networks based on interface commands
- You must no shut the routing process, When IPV6 is configured this action creates a routing process however this process needs to be no shut to bring it up.
- EIGRPv6 requires a router-id
- Passive interfaces are configured on the routing process only
- EIGRPv6 performs route filtering using only the distribute-list prefix-list command.
- Automatic summarisation EIGRPv6 has no equivalent to the IPV4 no auto-summary command as there is no concept of classful routing in IPv6
- EIGRPv6 is supported in Cisco IOS beginning 12.4(6)T
Unchanged Features
All of the following features work the same as they did in IPv4. When configuring the commands use the command ipv6 instead of ip in interface commands.
- Metric weights
- Authentication
- Link Bandwidth Percentage
- Split Horizon
- Next-hop setting
- Hello interval and hold time config
- Address summarisation
- Stub networks
- Variance
- Most other features.
Configuring EIGRP for IPv6
- Enable IPv6 unicast routing
- Configure EIGRP on at least one interface
- In the EIGRP routing process, assign a router-ID
- Issue the no shutdown command in the EIGRP process
- Use the relevant show commnads to check your config.
