[c-nsp] High CPU on 3750G-24-TS

[William]

We currently use ip igmp join-group x.x.x.x under the vlan interface.

Cheers.

W

2008/11/12 Ozgur Guler <gulerozgur at yahoo.co.uk>:
> As far as i remember ip igmp static-group forces the packets to be process
> switched on the switch/router. You might need to replace it with ip igmp
> static-group which will do the same job (put the interface permanently into
> OIF).
>
>
>
> --- On Wed, 12/11/08, William <willay at gmail.com> wrote:
>
> From: William <willay at gmail.com>
> Subject: [c-nsp] High CPU on 3750G-24-TS
> To: "cisco-nsp" <cisco-nsp at puck.nether.net>
> Date: Wednesday, 12 November, 2008, 11:15 AM
>
> Hi List,
>
> We currently have a 3750G-E in our network which is experiencing a
> high CPU load and I'm trying to understand why, the CPU is over 50%
> all the time and at peak traffic times we are seeing around 85% on
> Cacti using 5 minute
>  averages.
>
> When running a show proc cpu sorted I can see that IP Input is taking
> up most of the CPU time with Spanning Tree coming second however ST is
> only using a fraction of what IP Input is using.
>
> The switch is not in a stack, runs IOS version 12.2(25)SEB4 and the
> image is IPSERVICES, the configuration has one routed port to another
> site (with sparse-dense-mode on), has one EIGRP process, 19 static
> routes,  access lists which are only used for SNMP/VTY and it has two
> VLAN interfaces. One of the VLAN interfaces has sparse-dense-mode
> enabled and a igmp join-group command. It pushes a lot of multicast
> traffic (around 10Mbits) which is probably the problem but I thought
> the 3750 would have been able to handle it without an issue.
>
> Any help is appreciated, I'd like to have a good understanding of what
> is causing the issue.
>
> Thank you for your
>  time,
>
> W
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