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I had a simular issue and i received these comments .
High CPU Utiliazation is normal on VIP. Check out the file, Internetworking Troubleshooting Handbook, Second Edition Chapter 15 Troubleshooting Serial Lines.
Sorry I do not have a link
The fix was to issue no ip route-cache on each serial interface.
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From: “Subhash P” Reply-To: “Subhash P” To: “Vishal Patel” CC: “Cisco certification” Subject: Re: 7500 CPU Processes Date: Wed, 6 Sep 2006 05:53:29 +0530 Hi Vishal,
Can you try disabling the ” ip accounting” feature for a while and see if its enabled?
Regards, Subhash.
On 9/6/06, Vishal Patel wrote: > > Hey guys, > > I have a 7500 , with dual RSP 4 / 256 MB RAM. > > The router has 1 VIP 4-80 , and that VIP has two PAs > > 1) Fast Eth > > 2) ATM > > Customers connect to Fast Eth , on it’s subinterfaces and almost all the > Fast Eth subinterfaces have CAR being implemented ( may be around 250 > subinterfaces ) > > And ATM is used to connect to the SP’s network , it also have around 80 > VCs. > > Router runs around 12 VRFs but no MPLS ( VRFs are connected back to > back > ) > > Now the issue is the cpu run at around 80 % on average ,and the IP Input > Process is eating 25/30 % of the processes. > > I have trying to implement all the fast , CEF and DCEF switching , still > it > seems lot of traffic is process switched. > > VIP’s cpu runs at only 20 % > > Any ideas which will help me to releive the CPU ? > > Cheers > > Vishal > >