[c-nsp] Long list of route-maps

[Arie Vayner (avayner)]

BTW, what kind of feeds are you taking from the 150 peers? I hope these
are not full route feeds... Make sure this is not the case...

Arie

-----Original Message-----
From: cisco-nsp-bounces at puck.nether.net
[mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Arie Vayner
(avayner)
Sent: Thursday, March 11, 2010 19:32
To: Andy B.; cisco-nsp at puck.nether.net
Subject: Re: [c-nsp] Long list of route-maps

Andy,

150 BGP peers could be a bit too much for some routers... You did not
mention your platform and the CPU level before activating this new link.

A few things to check in general which could have impact on BGP
performance:
- Do you have BGP Path MTU Discovery enabled?
- Increase the ingress hold queue of your ingress interface
- Check that you do not have a too restrictive COPP policy, which
creates drops, and hence retransmit ions of packets.

Arie

-----Original Message-----
From: cisco-nsp-bounces at puck.nether.net
[mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Andy B.
Sent: Thursday, March 11, 2010 19:19
To: cisco-nsp at puck.nether.net
Subject: [c-nsp] Long list of route-maps

I feel desperate: I just turned up a new Transit Session with an
upstream and my router goes nuts and is dropping other BGP sessions on
it: 4/0 (hold time expired) 0 bytes

The situation is like this:

The router is peering on a public IX with approximatively 150 members.
Each BGP session has its own route-map, so the list is really BIG!

When I turned up my transit about an hour ago, CPU went to 100% and is
still at 100% right now and it drops BGP peers and brings them back,
and drops and brings them back, ... I'm in a loop and I think the only
way to get out of that look is to bring up each bgp peer step by step
- really not an option.

CPU utilization for five seconds: 100%/5%; one minute: 99%; five
minutes: 99%
 PID Runtime(ms)   Invoked      uSecs   5Sec   1Min   5Min TTY Process
 442    56982884  32932073       1730 83.93% 85.54% 82.20%   0 BGP
Router
 329     1639012   1857164        882  3.35%  2.01%  3.28%   0 IP RIB
Update
 403     6686764   2462837       2715  1.91%  0.71%  0.81%   0 BGP
Scheduler
 273     7514324  63409992        118  1.51%  1.55%  1.44%   0 IP Input
 340      421908   2376861        177  1.35%  0.63%  0.96%   0 XDR mcast
 553     3487144  30648800        113  0.87%  1.21%  1.28%   0 BGP I/O
   9    35017808   1752692      19979  0.79%  0.54%  0.50%   0 Check
heaps
 550     7132896  84539324         84  0.47%  0.30%  0.32%   0 IPv6
Input
  12    20351908 188141150        108  0.15%  0.54%  0.36%   0 ARP Input
 493      465108   4375354        106  0.07%  0.05%  0.03%   0 Port
manager per
  66        7916    202448         39  0.07%  0.00%  0.00%   0 BGP Open
 333      284012  26233730         10  0.07%  0.16%  0.15%   0 TCP Timer
 402       41152  73291500          0  0.07%  0.00%  0.00%   0 RADIUS
  51      155388   2479245         62  0.07%  0.05%  0.05%   0
Per-Second Jobs
  95       45504   2448923         18  0.07%  0.00%  0.00%   0 Heartbeat
Proces
  24     9277560  71169033        130  0.00%  0.10%  0.11%   0 IPC Seat
Manager
  52     1725428     43152      39984  0.00%  0.08%  0.05%   0
Per-minute Jobs
 328     5111328     41990     121727  0.00%  0.23%  0.18%   0 IP
Background
 341      723640    487509       1484  0.00%  0.01%  0.00%   0 IPC LC
Message H
 353      851584   3607096        236  0.00%  0.03%  0.04%   0 CEF: IPv4
proces
 371       20720   2473579          8  0.00%  0.01%  0.00%   0 OSPF-1
Router
 372      475340   1244448        381  0.00%  0.03%  0.02%   0 HIDDEN
VLAN Proc
 546       33060    117785        280  0.00%  0.00%  0.03%   0 IPv6 RIB
Redistr
 551       77312  12335517          6  0.00%  0.03%  0.04%   0 IPv6 ND
 560       49732     17676       2813  0.00%  0.01%  0.10%   0 SNMP
Traps
 562       41720       903      46201  0.00%  0.00%  0.23%   0
Collection proce
 563    55952820    420289     133129  0.00%  0.88%  1.80%   0 BGP
Scanner
 565         784       200       3920  0.00%  0.15%  0.13%   1 SSH
Process


6500 box with SXI3

What is eating my router's CPU?
Is it the big list of route-maps?
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