[j-nsp] BGP Flowspec + NSR
Harry Reynolds
harry at juniper.net
Tue Mar 16 19:54:22 EDT 2010
I can confirm that the flowspec family is one of several that are not yet nsr supported. The expected results are as you show...
There is an ER/RLI to add but this is not currently scheduled for any release.
Regards
-----Original Message-----
From: juniper-nsp-bounces at puck.nether.net [mailto:juniper-nsp-bounces at puck.nether.net] On Behalf Of Richard A Steenbergen
Sent: Tuesday, March 16, 2010 4:44 PM
To: juniper-nsp at puck.nether.net
Subject: [j-nsp] BGP Flowspec + NSR
So I noticed something interesting about NSR, apparently it doesn't support BGP sessions with flowspec SAFIs enabled. Here is a sh bgp sum from the backup RE of a router trying to do NSR, note the number of
flaps:
ras at backupre.somerouter> show bgp summary
Groups: 53 Peers: 74 Down peers: 24
Table Tot Paths Act Paths Suppressed History Damp State Pending
inet.0 394198 250825 0 0 0 0
inetflow.0 0 0 0 0 0 0
inet6.0 3288 2418 0 0 0 0
Peer AS InPkt OutPkt OutQ Flaps Last Up/Dwn State|#Active/Received/Accepted/Damped...
x.x.x.x xxxx 0 0 0 142650 6 Idle
x.x.x.x xxxx 0 0 0 137608 3 Idle
x.x.x.x xxxx 0 0 0 130645 5 Idle
x.x.x.x xxxx 0 0 0 138745 1 Idle
etc etc etc
ras at backupre.somerouter> show bgp neighbor x.x.x.x | match "Last flap"
Last flap event: NsrNotsupported
It just sits and spins forever trying to bring up the BGP sync session between the master and backup RE, and turning off inetflow negotiation makes things work properly again. This was under 9.5 and 9.6, but I haven't seen anything in any release notes about support for it in any later software versions. Does anybody know if this is actually on the roadmap to get supported, or has flowspec just completely fallen off the radar since Pedro and Raszuk left Juniper? :)
--
Richard A Steenbergen <ras at e-gerbil.net> http://www.e-gerbil.net/ras
GPG Key ID: 0xF8B12CBC (7535 7F59 8204 ED1F CC1C 53AF 4C41 5ECA F8B1 2CBC)
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