[FROG] BGP CPU Usage

Richard J Palmer richard at merula.net
Tue Oct 17 07:52:10 EDT 2017


Hi

We have FRR running on a number of core routers here - However it 
seems that bgpd is using 100% CPU most of the time:

top - 12:48:16 up 95 days, 20:02,  1 user,  load average: 1.41, 1.25, 
1.20
Tasks: 151 total,   4 running, 147 sleeping,   0 stopped,   0 zombie
%Cpu(s): 11.7 us,  3.6 sy,  0.0 ni, 83.8 id,  0.0 wa,  0.0 hi,  0.9 
si,  0.0 st
MiB Mem : 3937.914 total,  509.301 free, 2035.738 used, 1392.875 
buff/cache
MiB Swap: 3082.750 total, 3082.750 free,    0.000 used. 1410.402 avail 
Mem

  PID USER      PR  NI    VIRT    RES    SHR S  %CPU %MEM     TIME+ 
COMMAND
23010 root      20   0 1651212 1.515g   3764 R  93.0 39.4   1594:12 
bgpd
 1050 root      20   0  409292 347104   3676 R  36.2  8.6  48720:02 
zebra
    7 root      20   0       0      0      0 S   0.3  0.0 866:46.42 
rcu_sch

There's only 15 peers mostly internal (one transit link). I am using 
both Ipv4 and IPv6

I am happy to share the bgp config as needed - biut there's nothing 
obvious I can see ... And the log is not showing any substantial 
entries

Is there something I am missing / or would give a hint on what is 
causing this high load / and how to resolve it ?

Thanks

Richard

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