[f-nsp] Route cache leak on MLX 5.0.00b ?

[Dunc]

Hi,

What are your system-max values for ip-cache and ip-route set to?

Are you using a CAM profile with enough room?


I've seen very strange things happen once you hit a limit and usually
end up changing something and rebooting.

Cheers,

Dunc



On 07/04/11 02:28, George B. wrote:
> Has anyone seen route cache issues on 5.0.00b?
>
> I have two routers both have basically the same peers:
>
> First one:
>
> IP Routing Table - 349996 entries
>
> Second one:
>
> IP Routing Table - 350213 entries
>
> If I do "sho ip cache" on the first unit, I get:
>
> Total IP and IPVPN Cache Entry Usage on LPs:
>  Module        Host    Network       Free      Total
>       1         131     349869          0     350000
>       2         143     349857          0     350000
>
> Both units were in that state when I logged into them earlier today.
>
> If I rconsole to either module and "clear ip cache", it clears out maybe
> 50 routes and that's it.
>
> After rebooting the second unit and letting it run for a couple of
> hours, it looks like:
>
> Total IP and IPVPN Cache Entry Usage on LPs:
>  Module        Host    Network       Free      Total
>       1         219      16763     363018     380000
>       2          54         33     379913     380000
>
> Which is much closer to what I expected to see and is closer to what
> another pair of units have after running for several weeks (notice I
> upped the max on this one but that doesn't really matter).  That first
> unit is obviously wacky (but as I mentioned, both units were in that
> state).  Another pair of units that have been running for months:
>
> uptime is 160 days 21 hours 40 minutes 8 seconds
> IP Routing Table - 349593 entries
>
> Total IP and IPVPN Cache Entry Usage on LPs:
>  Module        Host    Network       Free      Total
>       1        1021      62984     285995     350000
>       2          39       1358     348603     350000
>
>
>
> Both units were reporting stuff like this in the logs:
>
> Apr  7 01:26:17:I:Warning: MODULE 1 - No free cache entry for new rout
> Apr  7 01:26:17:I:Warning: MODULE 2 - No free cache entry for new rout
> Apr  7 01:26:08:I:Warning: cannot allocate free cache entr
> Apr  7 01:26:04:I:Warning: cannot allocate free cache entr
> Apr  7 01:25:07:I:Warning: cannot allocate free cache entr
>
> It sure looks like some kind of cache leak to me, like it can't reap
> stale cache entries.
>
> Anyone seen anything like this?  Looks like a reboot clears it just fine.
>
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