Re: Getting pretty close to default IPv4 route maximum for 6500/7600 routers.

[Łukasz Bromirski <lukasz () bromirski net>]

Hi Blake,

On 10 Jun 2014, at 19:04, Blake Hudson <blake () ispn net> wrote:

> In this case, does the 512k limit of the 6500/7600 refer to the RIB or the FIB? And does it even matter since the BGP 
> prefix table can automatically be reduced to ~300k routes?

Te 512k limit refers to FIB in the B/C (base) versions of 6500/7600
Supervisors and DFCs (for line cards). BXL/CXL versions have FIB for
1M IPv4 prefixes.

You can find more information here:

http://www.cisco.com/c/en/us/support/docs/switches/catalyst-6500-series-switches/117712-problemsolution-cat6500-00.html

And yes, you’re right - no matter how many neighbors you have, the FIB
will only contain best paths, so it will be closer to 500k entries in
total rather than N times number of neighbours.

-- 
"There's no sense in being precise when |               Łukasz Bromirski
 you don't know what you're talking     |      jid:lbromirski () jabber org
 about."               John von Neumann |    http://lukasz.bromirski.net