On Wednesday, December 31, 2014, Marcin Kurek <not...@marcinkurek.com> wrote:
> Hi everyone, > > I'm reading Randy's Zhang BGP Design and Implementation and I found > following guidelines about designing RR-based MPLS VPN architecture: > - Partition RRs > - Move RRs out of the forwarding path > - Use a high-end processor with maximum memory > - Use peer groups > - Tune RR routers for improved performance. > > Since the book is a bit outdated (2004) I'm curious if these rules still > apply to modern SP networks. > What would be the reasoning behind keeping RRs out of the forwarding path? > Is it only a matter of performance and stability? > > Thanks, > Marcin > Correct, these ideas are MOSTLY rooted in old school router limitations. Ymmv. Look for facts in the replies you get, not unsubstantiated opinions. There is no technical reason to have a bgp rr out of path on a hardware based forwarding router that has sufficient control plane capacity to run bgp. CB