Subnet Size for BGP peers.

Paul Stewart pstewart at nexicomgroup.net
Wed Jul 29 17:02:07 CDT 2009


/29's here for everyone.... great for troubleshooting and any future
additions typically required...;)

-----Original Message-----
From: Jim Wininger [mailto:jbotctc at gmail.com] 
Sent: July 29, 2009 4:00 PM
To: nanog at nanog.org
Subject: Subnet Size for BGP peers.

I have a question about the subnet size for BGP peers. Typically when we

turn up a new BGP customer we turn them up on a /29 or a /30. That seems
to

be the "norm".


We connect to many of our BGP peers with ethernet. It would be a simple

matter to allocate a /24 for connectivity to the customer on a shared
link.

This would help save on some address space.


My question is, is this in general good or bad idea? Have others been
down

this path and found that it was a bad idea? I can see some of the
pothols on

this path (BGP session hijacking, incorrectly configured customer
routers

etc). These issues could be at least partially mitigated. Are there
larger

issues when doing something like this or is it a practical idea?

-- 

Jim Wininger

-- 
Jim Wininger
jbotctc at gmail.com


 

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