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March 3, 2011

IPv6: Cisco IOS

Addressing. Routing. DHCP. EIGRP. HSRP. Mobility. After consuming Cisco’s 706-page IOS IPv6 Configuration Guide, these are just a few of the areas we’re processing as the deployment plan starts coming together. If you’re running something other than Cisco, some of the commands below, and of course EIGRP, may not directly apply, but perhaps you can abstract the concepts and use them in your own network.

Here’s a rundown of the IOS commands we’ll be utilizing as we begin to implement:

  • ipv6 address: (Interface) Apply to VLAN interfaces, routing interfaces, etc (i.e. vlan20, g1/10, g2/0/23)
  • ipv6 general-prefix: (Global) Specifies the prefix of your IPv6 address space (i.e. 2001:d8:91B5::/48)
  • ipv6 unicast-routing: (Global) Enables IPv6 routing on the switch/router
  • ip name-server: (Global) Not specific to IPv4 or v6, but necessary to add IPv6 name server addresses
  • ipv6 dhcp relay destination: (Interface) Configure on all interfaces that need DHCP relaying
  • ipv6 eigrp: (Interface) Unlike IPv4, EIGRP is interface-specific (no “network” statements); apply to routing interfaces
  • ipv6 router eigrp: (Global) Creates the EIGRP router process on the switch
  • ipv6 hello-interval eigrp: (Interface) Configured on interfaces using EIGRP to set the frequency of hello packets to adjacent routers
  • ipv6 hold-time eigrp: (Interface) Configured on interfaces using EIGRP to tell neighbors how long the sender is valid

Coming next: a consolidated IPv6 deployment plan, derived from NIST Guidelines for the Secure Deployment of IPv6

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By Chris Gurley, MCSE, CCNA
Last updated: March 3, 2011

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