From: Weidong Xiao (Weidong.Xiao@vi.net)
Date: Tue Feb 25 2003 - 14:05:24 GMT-3
Thanks Chuck, you are always helpful.
For the purpose to off load the 6509, I issued "ip route TARGET-IP 255.255.255.255 Null 0", the cpu usuage immediately increased by 25%. When I took that off, the cpu usuage immediatly droped. I should be able to draw the conclution that something must be wrong in the IOS. Have sheuded time to upgrade and I'll let you know the result.
Cheers,
Weidong
> -----Original Message-----
> From: Chuck Church [mailto:ccie8776@rochester.rr.com]
> Sent: 24 February 2003 19:22
> To: Weidong Xiao; ccielab@groupstudy.com
> Subject: Re: cpu usuage high
>
>
> It's a long shot, but you might want to try a newer IOS. I
> know there were
> some performance problems with buffers on some of the 12.1.8
> or so versions.
> Don't know if the problem existed in 12.1.2E. Might want to
> try 12.1.13Ex.
> It'll add the luxury of NBAR as well, in case you need that
> down the road.
>
> Chuck Church
> CCIE #8776, MCNE, MCSE
>
>
> ----- Original Message -----
> From: "Weidong Xiao" <Weidong.Xiao@vi.net>
> To: <ccielab@groupstudy.com>
> Sent: Monday, February 24, 2003 9:33 AM
> Subject: RE: cpu usuage high
>
>
> > Thanks.
> >
> > "sh ip bgp flap-statistics" shows nothing. bgp connection is pretty
> stable. I used bongon BGP template as well. The interface
> didn't flap. The
> high cpu usuage happened when income traffic suddenly
> increased. Logs show
> most of the traffic go to the target.
> >
> > br1.rtr#sh ver
> > Cisco Internetwork Operating System Software
> > IOS (tm) MSFC2 Software (C6MSFC2-IS-M), Version 12.1(2)E,
> EARLY DEPLOYMENT
> RELEASE SOFTWARE (fc
> > 1)
> >
> > br1.rtr#sh run
> > ...
> > interface Null0
> > no ip unreachables
> > ...
> >
> > > -----Original Message-----
> > > From: Nawaz, Ajaz [mailto:Ajaz.Nawaz@bskyb.com]
> > > Sent: 24 February 2003 11:24
> > > To: 'Tony Huang'; Weidong Xiao; ccielab@groupstudy.com
> > > Subject: RE: cpu usuage high
> > >
> > >
> > >
> > > This has nothing to do with Spantree whatsover - the issues
> > > higlighted are
> > > related to router processes pointed out by Weidong Xiao
> > > below. They are IP
> > > Input and BGP Scanner.
> > >
> > > There is not enough information to say exactly what may be
> > > causing this but
> > > it could be a bug or something like BGP flap. We need to see
> > > output from
> > > show ver and config too for starters. If you see it again use
> > > show ip bgp
> > > flap-statistics. Does the high CPU follow an interface flap ?
> > >
> > >
> > > ajaz
> > >
> > >
> > >
> > > -----Original Message-----
> > > From: Tony Huang [mailto:tonyh5@hotmail.com]
> > > Sent: 24 February 2003 02:00
> > > To: Weidong Xiao; ccielab@groupstudy.com
> > > Subject: Re: cpu usuage high
> > >
> > >
> > > Hi,
> > > I think the frequent change of networkk status could cause
> > > the high cup
> > > usage because the switch needs to run spantree times. By
> > > issuing sh spantree
> > > statistics, you should be able to see which port has incured
> > > the change. You
> > > can find this by looking at the column: topology change last
> > > recvd. from.
> > > From there, you can keep tracing the source of problems.
> > > Hope it helps,
> > >
> > > Cheers,
> > >
> > > Tony
> > >
> > > ----- Original Message -----
> > > From: "Weidong Xiao" <Weidong.Xiao@vi.net>
> > > To: <ccielab@groupstudy.com>
> > > Sent: Monday, February 24, 2003 9:34 AM
> > > Subject: cpu usuage high
> > >
> > >
> > > > Hi Group,
> > > >
> > > > A cat6509 is receiving about 30Mb/s traffic from the
> > > Internet. Normally
> > > the cpu usuage is under 10%. But for the last couple of hours
> > > it's like
> > > below. I am wondering what kind of traffic can be so
> > > 'powerful', and what
> > > does pid 19 (see below) mean. Can anyone shed some light?
> > > >
> > > > Thanks very much,
> > > > Weidong
> > > >
> > > >
> > > > br1.rtr#sh proc cpu
> > > > CPU utilization for five seconds: 48%/32%; one minute: 64%;
> > > five minutes:
> > > 65%
> > > > PID Runtime(ms) Invoked uSecs 5Sec 1Min 5Min
> TTY Process
> > > > ....
> > > > 19 42728104 184864569 231 16.54% 19.07% 19.36%
> 0 IP Input
> > > > ....
> > > > 66 175270476 1282394 136677 0.00% 1.39% 1.94% 0
> > > BGP Scanner
> > >
> > >
> > > .
> > >
> > >
> > >
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> > >
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