[c-nsp] BGP neighbors & load

[Stephen Wilcox]

It will support hundreds .. the issue is how many paths you learn  
which is what will use both CPU and memory.

I dont exactly remember the limit but I think when we hit 120000 BGP  
routes was when I had to take my NPE-200s out of service just because  
it ran out of memory. But even before the memory limit was hit, the  
router was low on resources.

I am guessing you are only talking of a few thousand routes and a  
handful of BGP peers? In which case it will be fine...

Steve

On Nov 20, 2007, at 3:32 PM, Adam Greene wrote:

> Hi,
>
> I'm planning on setting up lots of eBGP neighbors on a 7200  
> NPE-200 / 128MB RAM / 12.3(15b). Each neighbor would receive a  
> default route from the 7200, and the 7200 would receive a single  
> route announcement from each neighbor.
>
> I wonder how many neighbors the router will support. Another way of  
> asking this could be how much CPU / RAM resources will each  
> neighbor consume on average?
>
> Currently the router terminates about 100 PPPoEoA DSL connections  
> and runs at about 12% CPU / 65MB RAM. We're just starting to set up  
> BGP so that we can provide redundancy on some of the links.
>
> Thanks for any insight ...
>
> Adam
>
>
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