i'd not look at nexus as edge/peering to replace c6k/7600. c6k replacement needs to look at role and requirements, not point product placement.
asr1k with rp2 control-plane or asr9k, depending on density/cost models (although to gert's earlier point, asr9001 fits small edge/pop, especially if more than a handful of 10gbe is needed, which gets expensive in asr1k quickly). q. -= sent via iphone. please excuse spelling, grammar, and brevity =- > On Feb 6, 2015, at 12:56, james list <[email protected]> wrote: > > Hi gert > Good info. > > From customer requirements and pricing point of view the idea is to > replace with a nexus. > > Regards > Il 06/feb/2015 19:45 "Gert Doering" <[email protected]> ha scritto: > >> Hi, >> >>> On Fri, Feb 06, 2015 at 03:16:26PM +0100, james list wrote: >>> do anybody have numbers in terms of BGP sessions scalability oin C7600 >>> SUP-720 ? >> >> "not that great"... >> >> Ours at DE-CIX has a handful of iBGP sessions and about 150 eBGP sessions >> to IXP participants, and if that interface flaps, it will hickup for >> about *1 hour* until everything is stable again. >> >> Effectively it depends on >> >> - number of sessions >> - number of prefixes on each session ("10 each" or "50.000") >> - how complicated your inbound and outbout policy is >> (our policy is slightly too complicated, with as-path matches which >> are not exactly performance efficient) >> - whether peers can be grouped into update-groups (= same export policy) >> - keepalive timers your peers have configured >> (the main issue is "CPU busy -> keepalives not answered in time -> >> session bouncing -> more CPU busy", which is made worse by short >> keepalive timers) >> >> We're not deploying Sup720s for anything with "lots of BGP" anymore, and >> the box in question will be replaced with an ASR9001 any day now, which >> is just laughing its NPUs off on that BGP load... ("BGP convergence in 30 >> seconds. done. anything more interesting to do? Any slow peer I could >> nuke with outgoing updates sent over too fast for it?"). >> >> gert >> -- >> USENET is *not* the non-clickable part of WWW! >> // >> www.muc.de/~gert/ >> Gert Doering - Munich, Germany >> [email protected] >> fax: +49-89-35655025 >> [email protected] > _______________________________________________ > cisco-nsp mailing list [email protected] > https://puck.nether.net/mailman/listinfo/cisco-nsp > archive at http://puck.nether.net/pipermail/cisco-nsp/ _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
