Sunday, February 1, 2015

Cisco CCNP - 300-101 - EIGRP IPv6 Named EIGRP

So it's that time again for me to renew my Cisco Certifications. As a result, this post will be based on my preparation for the CCNP Route Exam (300-101).

In this post I will be focusing on Named EIGRP

EIGRP IPv6 and Named EIGRP
   
- Major difference between EIGRP IPv4 and EIGRP named configuration is how interfaces are configured to participate in EIGRP
- Configuration uses a hierarchical model
- All commands are entered in one place
- Named EIGRP requires fewer commands than regular EIGRP


Differences between EIGRP IPv4 and EIGRP IPv6
    - EIGRP IPv6 advertises prefixes not subnet/mask
    - Uses neighbor's link local address as next hop
    - messages are encapsulates in IPv6 packets
    - Cannot perform route summarisation, since there is no concept of route summarization
    - Neighbors does not have to be in the same subnet IPv6 subnets to become neighbors
   

Configuration
    - enable ipv6 unicast-routing
    - ipv6 router eigrp 10
    - Configure address on each interface
    - ipv6 enable
    - enable on the interface ipv6 eigrp 10
    - stop and start process with shutdown or no shutdown
    - configure router id
    - the EIGRP process must have a router-id or the process won't start
    - All connected subnets are advertised except link-local addresses and local routes
   

- Link local addresses are used to source Hello packets
- Uses multicast address    
- Link Local address is never route
- Link local addresses are automatically assigned when the interface is enabled
- Can be configured manually - use prefix FE80 with a prefix length of /10
   



Reference:
http://www.cisco.com/c/dam/en/us/products/collateral/ios-nx-os-software/enhanced-interior-gateway-routing-protocol-eigrp/Advances_In_EIGRP.pdf
https://supportforums.cisco.com/blog/11939146/glimpse-eigrp-name-mode-configuration

1 comment:

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