[c-nsp] CSCti84025

[Tim Durack]

On Tue, May 17, 2011 at 4:01 AM, Phil Mayers <p.mayers at imperial.ac.uk> wrote:
> On 05/16/2011 05:00 PM, Tim Durack wrote:
>>
>> Anyone run into CSCti84025 on a C6K, VS-S720-3C, 12.2(33)SXI3?
>>
>>
>> VRFs hardware re-mapping causing MLS/CEF inconsistencies
>
> We've had something very like this on SXI3 - routing changes trigger MPLS
> label mis-programming resulting in CPU punt and high packet loss on affected
> LSPs. TAC logged in and did some poking at the TCAM and fixed it, then I
> reloaded the box a week or so later.
>
> We're on SXI5 and these seem to have gone away.

Good to know. We have case open with TAC, and are testing SXI6 as the fix.

>> Interested in knowing what it "feels" like. We are seeing these
>> invalid entries, and have been experiencing random/cyclic packet loss.
>> I'm guessing invalid labels punting to control plane with CoPP
>> configured might result in seemingly random packet loss.
>
> That's exactly what we experienced.
>
> It seems to "go away" for a while after reload i.e. the TCAM mis-programming
> doesn't seem to happen until the box has been up a while. But that was very
> much an impression/gut feeling, no hard evidence.

Thanks for the comments.

-- 
Tim:>