[84967] in North American Network Operators' Group

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RE: [eng/rtg] changing loopbacks

daemon@ATHENA.MIT.EDU (Neil J. McRae)
Thu Sep 29 15:23:38 2005

From: "Neil J. McRae" <neil@DOMINO.ORG>
To: "'Randy Bush'" <randy@psg.com>, "'David Sinn'" <dsinn@dsinn.com>
Cc: <nanog@nanog.org>
Date: Thu, 29 Sep 2005 20:20:14 +0100
In-Reply-To: <17212.13310.379534.929756@roam.psg.com>
Errors-To: owner-nanog@merit.edu


 > 
> 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>.
> 

I think with OSPF this will be very difficult to 
do without rebooting (or as long an outage as rebooting). 
We migrated from OSPF to IS-IS and changed some loopbacks a  
while ago, the IS-IS change was totally transparent - no issue, 
but on the change of loopback caused a lot of BGP churn. 
It was easier to change it and reboot and do
it over a period of time in small network triangles. 

I always thought that the billing system was the database
of record ;-)

Neil.


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