[c-nsp] multicast vrf on 7600 - high cpu after upgrade to 12.2(33)SRE2

[Artyom Viklenko]

08.10.2010 10:25, Artyom Viklenko пишет:
> Hi, All!
>
> Sorry, but I need some quick advise.
>

Found caveta on Cisco site.

'mls rate-limit multicast ipv4 fib-miss' solves high cpu problem.


Thanks!


> I have multicast vpn configured on several 7600 routers
> with rsp720-3cxl-ge. One router receives multicast traffic
> for about 90 iptv channels via gi3/10. This interface configured
> as member of multicast vrf. This is entry point for iptv
> from streammers.
>
> interface GigabitEthernet3/10
> description MVRF IPTV Test Input
> ip vrf forwarding mcast
> ip address 172.16.254.1 255.255.255.252
> ip access-group IPTV-IN in
> ip access-group BLOCK-TO-TV out
> ip pim bsr-border
> ip pim sparse-dense-mode
> load-interval 30
> end
>
> All was ok with multicast.
>
> Today morning I've upgraded IOS on this router from
> 12.2(33)SRD4 advipservices to 12.2(33)SRE2 advipservices.
>
> When router backs online I found very high cpu utilization on it.
> After some investigations the problem of high cpu was found.
> It is a multicast stream towards multicast vrf via gi3/10.
>
> If I shutdown gi3/10 - cpu usage drops to usual 0-2%.
> Also, before ios upgrade, command 'sh ip mroute vrf mcast'
> showed routes for all multicast groups. And now only for
> small subset of them.
>
> Also 'sh ip access-list IPTV-IN' shows rapid counters increase.
>
> Extended IP access list IPTV-IN
> 10 permit udp any 233.169.2.0 0.0.0.255 (35705192 matches)
> 20 deny ip any any (10 matches)
>
> The same config on another set of routers with SRD4 works fine.
>
> Can someone please give me some hints to solve this problem?
>
> Thanks in advance!
>


-- 
            Sincerely yours,
                             Artyom Viklenko.
-------------------------------------------------------
artem at aws-net.org.ua | http://www.aws-net.org.ua/~artem
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