BGP Router high process

[ALL SMART IPOPS]

What do we need to do if BGP Router contribute high process in CPU?

CPU utilization for five seconds: 97%/43%; one minute: 99%; five minutes: 92%

PID Runtime(ms)   Invoked      uSecs   5Sec   1Min   5Min TTY Process

44    36270732  35464661       1022 25.03% 15.21% 14.43%   0 BGP Router

325   7703860203228294256          0 10.47%  5.58%  5.24%   0 IP Input

455     7596596  28244228        268  5.59%  1.60%  0.82%   0 BGP I/O

543    13576608   8569950       1584  3.83% 18.94%  9.57%   0 BGP Task

9   152474380  15201602      10030  2.07%  0.27%  0.57%   0 Check heaps

376    16372652   7777145       2105  1.83% 13.93% 13.76%   0 IP RIB Update

358    56785192  14452691       3929  0.95%  0.44%  0.52%   0 CEF: IPv4 proces

23    55656604 116191071        479  0.71%  0.51%  0.50%   0 ARP Input

348     5736736   7812055        734  0.63%  4.19%  5.03%   0 XDR mcast

546    36531108 132425650        275  0.63%  0.37%  0.28%   0 Port manager per

35    56337684 306101724        184  0.23%  0.42%  0.30%   0 IPC Seat Manager

330   287962916 871459868        330  0.23%  0.39%  1.61%   0 SNMP ENGINE

286      7682841067821917          0  0.15%  0.07%  0.07%   0 Ethernet Msec Ti

626      354112    825565        428  0.15%  0.11%  0.09%   0 IPv6 Input

3      754316 523105917          1  0.15%  0.10%  0.09%   0 HSRP Common

385     2182508  14151135        154  0.15%  0.10%  0.14%   0 L3 Manager

317    44655884 658073408         67  0.07%  0.04%  0.21%   0 PDU DISPATCHER

395     4363480   4661440        936  0.07%  0.04%  0.05%   0 HIDDEN VLAN Proc

323     1161648 134374319          8  0.07%  0.04%  0.05%   0 VRRS Main thread

56     2269676   9230664        245  0.07%  0.08%  0.07%   0 Per-Second Jobs

240     1449416   1870109        775  0.07%  0.04%  0.05%   0 Compute load avg

243   1488814081309230003        113  0.07%  0.13%  0.76%   0 IP SNMP           CPU utilization for five seconds: 97%/43%; one minute: 99%; five minutes: 92%  PID Runtime(ms)   Invoked      uSecs   5Sec   1Min   5Min TTY Process    44    36270732  35464661       1022 25.03% 15.21% 14.43%   0 BGP Router         325   7703860203228294256          0 10.47%  5.58%  5.24%   0 IP Input           455     7596596  28244228        268  5.59%  1.60%  0.82%   0 BGP I/O            543    13576608   8569950       1584  3.83% 18.94%  9.57%   0 BGP Task             9   152474380  15201602      10030  2.07%  0.27%  0.57%   0 Check heaps        376    16372652   7777145       2105  1.83% 13.93% 13.76%   0 IP RIB Update      358    56785192  14452691       3929  0.95%  0.44%  0.52%   0 CEF: IPv4 proces    23    55656604 116191071        479  0.71%  0.51%  0.50%   0 ARP Input          348     5736736   7812055        734  0.63%  4.19%  5.03%   0 XDR mcast          546    36531108 132425650        275  0.63%  0.37%  0.28%   0 Port manager per    35    56337684 306101724        184  0.23%  0.42%  0.30%   0 IPC Seat Manager   330   287962916 871459868        330  0.23%  0.39%  1.61%   0 SNMP ENGINE        286      7682841067821917          0  0.15%  0.07%  0.07%   0 Ethernet Msec Ti   626      354112    825565        428  0.15%  0.11%  0.09%   0 IPv6 Input           3      754316 523105917          1  0.15%  0.10%  0.09%   0 HSRP Common        385     2182508  14151135        154  0.15%  0.10%  0.14%   0 L3 Manager         317    44655884 658073408         67  0.07%  0.04%  0.21%   0 PDU DISPATCHER     395     4363480   4661440        936  0.07%  0.04%  0.05%   0 HIDDEN VLAN Proc   323     1161648 134374319          8  0.07%  0.04%  0.05%   0 VRRS Main thread    56     2269676   9230664        245  0.07%  0.08%  0.07%   0 Per-Second Jobs    240     1449416   1870109        775  0.07%  0.04%  0.05%   0 Compute load avg   243   1488814081309230003        113  0.07%  0.13%  0.76%   0 IP SNMP

[e.ciollaro]

Hi,

BGP Router process is in charge to determine the best path and processes any route "churn". It also sends and receives routes, establishes peers, and interacts with the routing information base (RIB).

(http://www.cisco.com/c/en/us/support/docs/ip/border-gateway-protocol-bgp/107615-highcpu-bgp.html)

So I suggest to check what make this process working hard. Depending on that you can choose what to do: bgp dampening (if you have many changes in advertisement received form a neighbor), tuning timer (if neighbor is flapping), using peer-group / update-groups to reduce the amount of job your BGP process has to do to process updates etc...

Have a look here: https://supportforums.cisco.com/discussion/11604471/high-cpu-usage-bgp-router-process

Bye,

enrico

PS please rate if useful

[paul driver]

Hello What is your router make/model? Do you have soft inbound configuration enabled? Are you excepting a full internet route table? Res Paul