[f-nsp] Current Total Free Memory [...] is below 5 percent of Installed Memory.

[Franz Georg Köhler]

Am 11.01.12 14:28, schrieb Dunc:
>>
>> I have high CPU utilization on the first line card.
>> My impression is that this is related to cam memory exhaustion, which
>> causes the packets to be switched to the line card CPU:
> 
> Hiya,
> 
> I might be wrong, but I thought dynamic mode means everything is sent to
> the CPU. Do you need to have dynamic enabled?
> 
> I think that as long as you haven't run out at the top of the table [IP]
> then it's OK. On an MLX here, I have SNet 7 being 100% used, but still
> free room at the top.

Hello,


after changing to static cam mode CPU utilization is indeed back to normal.

I was under the impression that dynamic cam mode would save cam memory.
It was surprising that CPU utilization on the line card was that high.
While I thought the used networks would stay in the dynamic CAM and only
being looked up the the CPU once it seems that dynamic CAM mode is
actually not to be recommended on routers with lots of active
destination routes.

CAM partitioning and utilization changed a bit:

#show cam-p u

CAM partitioning profile: multi-service-2

Slot 1 XPP20SP 0:
            [IP] 458752(size),   70890(free), 84.54%(used)
        :SNet 0:   6993(size),    3608(free), 48.40%(used)
        :SNet 1: 413274(size),   64632(free), 84.36%(used)
        :SNet 2:  32183(size),    2209(free), 93.13%(used)
        :SNet 3:   4795(size),      11(free), 99.77%(used)
        :SNet 4:    869(size),       7(free), 99.19%(used)
        :SNet 5:    173(size),       1(free), 99.42%(used)
        :SNet 6:     30(size),       0(free), 100.00%(used)
        :SNet 7:     19(size),       9(free), 52.63%(used)
        :SNet 8:     32(size),      30(free), 06.25%(used)
        :SNet 9:     32(size),      32(free), 00.00%(used)
       :SNet 10:     16(size),      16(free), 00.00%(used)
       :SNet 11:     16(size),      16(free), 00.00%(used)


Do I have to worry about a totally used SNet?




Best regards,

Franz Georg Köhler