On 04/12/2014 18:51, Pete Lumbis wrote:


On Tue, Dec 2, 2014 at 7:45 AM, Phil Mayers <[email protected]
<mailto:[email protected]>> wrote:


    What I find most frustrating is that you can't "clear [mls|hardware]
    ..." when these occur. There seem to be no way of resetting it to
    known-good state and reprogramming from scratch short of a reload; I
    would rather a 10 second outage whilst PFC is cleared and
    reprogrammed compared to 180 second as the box is reloaded :o/


You can issue a "clear ip route x.x.x.x" to force a hardware
reprogramming. It won't work every time, but you might get lucky.

I must have done that, and various other "maybe" commands, a dozen or two times in the last 7 years. Not once has it worked.

The only time I've seen a 6500/sup720 recover from a FIB misprogram without power-cycling the affected linecard or entire chassis was after 90 minutes of work by a TAC engineer, who ended up manually poking the CAM entries in via debug commands. His signing off recommendation was "obviously reboot the box asap to get it into a clean state".

This tells me all I need to know, I'm afraid! ;o)

Cheers,
Phil


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