[isp-bgp] RE: full bgp table + bgp scanner = icmp spikes

["Kevin Schoen" <schoen.kevin@...>]

Spikes are normal because of the bgp scanner. Ping through the router,
if you are not having a problem then its aok. 

You should enable ip route-cache cef, on 12.3 if you have any
subinterface's cef disable it disables all cef on that interface. 

-----Original Message-----
From: mb@...mailto:mb@...] 
Sent: Thursday, April 29, 2004 7:58 PM
To: isp-bgp@isp-bgp.com
Subject: [isp-bgp] full bgp table + bgp scanner = icmp spikes

I have just upgraded our 7206 to 12.3(7)T, and noticed icmp spikes on
all 
connections within our subnet range (/20) i.e. pinging any IP in our
range 
results in a spike every 60 seconds or so. 

This occured on our previos IOS ver, and was because of bgp-scanner cpu
spikes 
(Fixed by enabling ip cef) 

I enabled ip cef - It did not fix the spikes and then noticed that the 
portchannel had "no ip route-cache cef" (Must be added by default?) 

Should the no ip route-cache cef be removed from every interface? 

Adding ip cef to the previous IOS (121-5.T17) fixed the spikes without
any 
further issues. 

Regards, 
MB 




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