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Re: [eng/rtg] changing loopbacks

  • From: Ian Dickinson
  • Date: Thu Sep 29 19:20:28 2005

Randy Bush wrote:
>>Personally, the cleanest way I've been able to accomplish changing this 
>>in regard to OSPF, logging and authentication on Cisco's is to suck 
>>down the running config, make the changes in your editor of choice, 
>>push it back up to startup-config and schedule a reboot.  iBGP is much 
>>easier to make the changes as you outline.
> this is my fear.  which is why i asked.  pushing out new configs
> (the canonic config is on disk, not the router [0]) and setting a
> reload of a bunch of routers at time t0 does not give me warm
> fuzzies about what the world will be like at time tn (n > 0).
> but i may have to take that path.  i am hoping folk will give me a
> magic pill.  after all, any group with such a deep understanding of
> how to deal with the world's social ills must know a bit of router
> magic <smirk>.

You may need to change your BGP router-id to match if you set it explicitly,
which *may* alter path selection (a long way down the tree I admit).

Another nasty is if you run TE and use the old Loopback as your TE-ID,
even with IS-IS.

Plus of course, your zone/hosts file for managing/polling these nodes in the
first place :-)
Ian Dickinson
Development Engineer

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