Hi All, Reviving this old thread, is anyone running a hierarchical FIB on a 7600, how is it working for you? Has it halved your PPS rate for VPNv4/VPNv6 traffic due to recirculation?
The Cisco documentation is fairly light and ambiguous. L2 and L3 VPNs are a major bread-and-butter at $dayjob so halving the PPS rate for MPLS VPN traffic through these boxes would be quite serious :) Also what about memory usage, at 2KBs per prefix carrying the full table plus customer routes on our 7600s (RSP-720-3CXLs) it looks like I couldn’t even turn it on if I wanted to? PIC Edge is “working” in that backup prefixes are installed into FIB however I haven’t been able to do any failover timing tests. I would still expect this to be fairly quick since the backup prefix is computed and programmed into FIB. In a PIC edge scenario only a small number (usually) of prefixes are being updated due to a CE-PE failure, comparatively speaking to a P/PE node failure which may require a set of full-table prefixes that need next-hop updates. In the case that a PE connected to a transit provider goes bang the 7600s are still slow to update. I don’t even have to measure this I can see it when performing maintenance work on transit links (CPU shoots to 100% and SSH slows down a bit etc whilst BGP churns). Cheers, James. _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
