[alcatel-nsp] 7750 CPU Utilization

[Alexander Saveliev]

Hello!

We have same issue with our 7750 with sfm2. We have large L2 segments 
(vpls on 7450s in aggregation) terminated on 7750 at L3 level. Our 
problem is caused by broadcast storms in access network. This storms 
generate many mcast/bcast packets of protocols configured on 7750 ip 
interface (example- arp, vrrp). Then 7750 tries to process this packets 
with its cpu. We can see this problem interfaces with command "show 
system security cpu-protection violators".




29.12.2010 10:46, Achmad Himawan ?????:
> Dear all,
>
> I found high CPU IP Stack utilization on our 7750 SR7 (TiMOS-C-6.0.R4).
>
> Router's main utilization is for Triple-Play service router.
>
> Anyone found similar case ?
>
> Thanks in advance.
>
> -Achmad
>
> =========================================
> CPU Utilization (Test time 999916 uSec)
> =========================================
> Name              CPU Time     CPU
> Usage
>
> (uSec)
> ----------------------------------------------------------------------------------
> System            25092         2.50%
> Icc                   2492         0.24%
> RTM/Policies         0         0.00%
> OSPF                277         0.02%
> MPLS/RSVP    1655         0.16%
> LDP                3443         0.34%
> IS-IS                    0         0.00%
> RIP                      0         0.00%
> VRRP             2245         0.22%
> BGP                      0         0.00%
> Services              1039         0.10%
> IOM                      0         0.00%
> CFLOWD                   0         0.00%
> IGMP/MLD               317         0.03%
> PIM                   7320         0.73%
> MCast Stack           4110         0.41%
> *IP Stack            949947        95.00% *
> DHCP server            207         0.02%
> MBUF                     0         0.00%
> IGMP/MLD Snpg          515         0.05%
> TLS MFIB              1107         0.11%
> WEB Redirect           150         0.01%
> MSDP                     0         0.00%
> BFD                      0         0.00%
> MCPATH                   0         0.00%
> Idle                     0         0.00%
> =========================================
>
>
>
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