[c-nsp] Long list of route-maps

[Andy B.]

On Thu, Mar 11, 2010 at 6:31 PM, Arie Vayner (avayner)
<avayner at cisco.com> wrote:
> 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.

It's a standard 6500 with SUP720-3BXL and SXI3 IOS

CPU when things are stable - meaning no 300k prefixes are received and
handled by a route-map:

CPU utilization for five seconds: 5%/3%; one minute: 8%; five minutes: 22%
 PID Runtime(ms)   Invoked      uSecs   5Sec   1Min   5Min TTY Process
 442    32752540  23050084       1420  1.67%  1.83%  3.58%   0 BGP Router
  12    10530960  73568808        143  0.23%  0.32%  0.43%   0 ARP Input
  24     9929364  66536895        149  0.15%  0.15%  0.12%   0 IPC Seat Manager
 550     5590548 104678906         53  0.07%  0.12%  0.17%   0 IPv6 Input
   9    35321344   1775168      19897  0.00%  1.81%  1.61%   0 Check heaps
  52     1741276     44845      38828  0.00%  0.04%  0.05%   0 Per-minute Jobs
 267        2372      2128       1114  0.00%  0.11%  0.02%   1 SSH Process
 273     6081996  48117818        126  0.00%  0.12%  5.80%   0 IP Input
 328     5130588     41932     122354  0.00%  0.13%  0.16%   0 IP Background
 329     1397596   2073628        673  0.00%  0.03%  0.06%   0 IP RIB Update
 353      825140   3638618        226  0.00%  0.02%  0.03%   0 CEF: IPv4 proces
 403     8109668   2461860       3294  0.00%  0.04%  0.16%   0 BGP Scheduler
 493      626732   4529700        138  0.00%  0.04%  0.02%   0 Port manager per
 553     2499400  19689788        126  0.00%  0.08%  0.17%   0 BGP I/O
 557     1455124   3184221        456  0.00%  0.06%  0.03%   0 SNMP ENGINE
 563    58994480    455252     129587  0.00%  1.66%  2.41%   0 BGP Scanner


>
> A few things to check in general which could have impact on BGP
> performance:
> - Do you have BGP Path MTU Discovery enabled?

No, this is not enabled.

> - Increase the ingress hold queue of your ingress interface

I tried that already, but different values did not change much.

> - Check that you do not have a too restrictive COPP policy, which
> creates drops, and hence retransmit ions of packets.

I currently have no COPP at all. But I can assure that the router is
not under any sort of attack. It's always behaving like that when a
larger peer (full table) is sending me prefixes. And right now the
whole mess does not want to stabilize - sometimes it does after 30
minutes, sometimes it takes forever.

More router info:

#sh ver
Cisco IOS Software, s72033_rp Software
(s72033_rp-ADVENTERPRISEK9_WAN-M), Version 12.2(33)SXI3, RELEASE
SOFTWARE (fc2)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2009 by Cisco Systems, Inc.
Compiled Tue 27-Oct-09 11:12 by prod_rel_team

ROM: System Bootstrap, Version 12.2(17r)SX5, RELEASE SOFTWARE (fc1)

 FRA uptime is 4 weeks, 20 hours, 7 minutes
Uptime for this control processor is 4 weeks, 19 hours, 56 minutes
Time since FRA switched to active is 4 weeks, 19 hours, 55 minutes
System returned to ROM by reload at 22:36:52 CEST Wed Feb 10 2010 (SP by reload)
System restarted at 22:40:49 CEST Wed Feb 10 2010
System image file is "disk0:s72033-adventerprisek9_wan-mz.122-33.SXI3.bin"


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cisco WS-C6504-E (R7000) processor (revision 2.0) with 983008K/65536K
bytes of memory.
Processor board ID FOX1232GUBZ
SR71000 CPU at 600Mhz, Implementation 0x504, Rev 1.2, 512KB L2 Cache
Last reset from s/w reset
3 Virtual Ethernet interfaces
26 Gigabit Ethernet interfaces
4 Ten Gigabit Ethernet interfaces
1917K bytes of non-volatile configuration memory.
8192K bytes of packet buffer memory.

65536K bytes of Flash internal SIMM (Sector size 512K).
Configuration register is 0x2102