Hi, You could try to enable bgp dampening.
Dumitru On 07-Mar-13 3:20 PM, Drew Weaver wrote: > Howdy, > > One of our routers in a smaller facility is still rocking a pair of PRP-2s > and we've been getting notices lately that it has been failing to respond to > SNMP queries. > > Makes sense, as my cell phone likely has a better CPU than the PRP-2 but I > wanted to see if there was any way to extend the life of this thing just a > little longer. > > I tracked the CPU usage and it appears that the BGP ROUTER process is what is > eating all of the CPU time when this issue happens. > > There seems to be a constant deadly drip of routing updates coming in from > one of the upstream providers attached to this router: > > The below were taken just 1 second apart: > > Neighbor V AS MsgRcvd MsgSent TblVer InQ OutQ > Up/Down State/PfxRcd > x.x.x.13 4 3356 164983466 1610722 334466344 13 0 > 4w2d 434626 > > Neighbor V AS MsgRcvd MsgSent TblVer inQ OutQ > Up/Down State/PfxRcd > x.x.x.13 4 3356 164983671 1610725 334466843 0 0 > 4w2d 434664 > > Neighbor V AS MsgRcvd MsgSent TblVer InQ OutQ > Up/Down State/PfxRcd > x.x.x.13 4 3356 164983700 1610725 334466843 0 0 > 4w2d 434674 > > We have only been getting the notices that SNMP is failing 2-3 times a day > out of 480 pollings but it's enough to cause alerts and operational events to > be created, etc. > > Awhile back we had a problem with another upstream where it would take an > hour sometimes to download the full table from them so we implemented PMTUD > which helped in that scenario; the max data segment size on this particular > neighbor appears to be 1460 bytes. > > Does anyone have any tips or tricks on ways to lessen the impact of the > constant route churn aside from either "Don't use a PRP-2 because it sucks" > or "don't import a full table". > > We're already scheduled to be upgrading to ASR9000s with RSP440s fairly soon > but like I said I do need to squeeze out just a few more months on this > beastie. > > This particular router is still running IOS and hasn't been upgraded to XR. > > Thanks! > -Drew > > _______________________________________________ > 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/
