Peering best practices advice needed.

Richard Irving rirving at antient.org
Wed Dec 8 17:56:13 UTC 2004


Rolo Tomassi wrote:
> Hi all,
> 
> Please forgive the simplistic nature of the query..
> 
> Basically my company is multi-homed with 2 different providers in the 
> UK, and advertising a /18. Now some colleaguges in another part of the 
> world want to break that /18 into two /19's and advertise one /19 and we 
> advertise the other. This is fine, however we are NOT running IBGP in 
> the core, therefore the UK customers in the /19 will not be able to 
> reach the other /19 as there would be a loop detected through EBGP.

    Pardon my simplistic solution, try dropping the /18, and -only-
advertise the corresponding /19 from each region.

> Now someone mentioned that we could use AS-LOOP-IN feature which will 
> overcome this problem and allow us to route to each other via EBGP. I 
> really think this is a bad idea but until we get an internal link - I 
> dont see a way forward. So... anyone doing this currently in their 
> network or have any "best practices" way round this. I want our company 
> to be good Netizens but still be able to pass traffic between the 2 /19's.

   See above. K.I.S.S. (No offense intended ;)

> 
> Any help would be greatly appreciated.
> 
> Rolo !
> 
> _________________________________________________________________
> Stay in touch with absent friends - get MSN Messenger 
> http://www.msn.co.uk/messenger



More information about the NANOG mailing list