Cisco Support Community
cancel
Showing results for 
Search instead for 
Did you mean: 
Announcements

Welcome to Cisco Support Community. We would love to have your feedback.

For an introduction to the new site, click here. If you'd prefer to explore, try our test area to get started. And see here for current known issues.

New Member

iBgp full mess

Hello,

Can anybody tell me the equation you use to calculate how many ibgp sessions you need to create a full mess ( with x amount of bgp peers)

Thanks for your help!

1 ACCEPTED SOLUTION

Accepted Solutions

Re: iBgp full mess

n*(n-1)/2

where n is the number of nodes running BGP

Since this would sometimes result in a large number of IBGP sessions you can implement RR(route reflectors) and confederations.

HTH

Narayan

4 REPLIES

Re: iBgp full mess

n*(n-1)/2

where n is the number of nodes running BGP

Since this would sometimes result in a large number of IBGP sessions you can implement RR(route reflectors) and confederations.

HTH

Narayan

New Member

Re: iBgp full mess

That's it...couldn't find it, thanks

Re: iBgp full mess

if you have X amount of BGP Peers then you will have X(X-1)/2 session in your AS

regards

Devang

New Member

Re: iBgp full mess

The [n(n-1)]/2 is a good general calculation for full mesh. Used to be used a lot before in Frame-Relay when calculating the number of PVC's needed for full mesh.

Just my additional $.02.

-lloyd

156
Views
0
Helpful
4
Replies