[c-nsp] CEF fun in SXF

[Gert Doering]

Hi,

On Mon, Apr 24, 2006 at 10:09:11PM -0400, Phil Rosenthal wrote:
> Bringing this back up from the dead, but we ran into this today on a  
> SXF4 box with 6748-dfc3bxl and 6704-dfc3bxl.  Anyone know if this  
> will be fixed ever?
> 
> TAC seemed to be clueless about this issue.

Hmmm.  Now this is interesting - TAC was quite helpful on our issue
("shutdown a VLAN interface, and traffic on other VLANs is getting
dropped").  Turns out it was related to uRPF - something in the hardware
gets confused, and other interface's traffic is uRPF dropped due to
looking up the wrong interface's CEF routes.

We have upgraded to SXF2 (Sup720/3B, no DFC cards), and since then,
we haven't seen any issues regarding "VLAN interface shutdown" since then.

TAC case # ist SR 602601049,  bug ID CSCsc90277

gert

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Gert Doering - Munich, Germany                             gert at greenie.muc.de
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