On Thu, Sep 06, 2007 at 02:11:03PM -0400, Drew Weaver wrote:
> Hi there.
>
> We are trying to connect a Catalyst 6509 connected via fiber to two GSR 12000
> routers.
>
> When we connect the switch to the router(s) via G5/1 and G5/2 (on the
> Supervisor 720) we get input errors on the Router (the GSR side), the line
> goes up/up but we see:
>
> Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
> 1668 input errors, 1668 CRC, 0 frame, 0 overrun, 0 ignored
>
> The throughput between the two pairs is also terribly slow.
>
> We have tried different cards in the GSRs, we have tried different fiber
> cables.
I'd generally recommend swapping ports, etc.. and checking different
patch panels, etc.. as you have already done.
A few other things that may be of value:
1) do a 'sh ip int <x/y>' to determine if the interfaces are using
CEF, etc..
2) Make sure you don't have any odd/strange configs, such as
have you disabled proxy-arp globally on the box? I strongly
recommend adding the following two on all your ethernet interfaces:
no ip proxy-arp
no ip redirects
Those should help reduce the cpu usage of the boxes. If you have
wonky static routes, eg: "ip route 10.0.0.0 255.0.0.0 someEthernet X/y" those
will stop working and your router cpu will come back to a sane level :)
If you tie the route to the interface, make sure you include the next-hop.
There's a lot of dumb defaults that cisco has left in over the years
that could contribute to your issues.
Check your interfaces, eg:
65xx#sh interfaces status
65xx#sh int gig5/1 cap
65xx#sh int gig5/1 stats
make sure things are showing up as you expect..
Hope this helps get you in the right direction.
- Jared
--
Jared Mauch | pgp key available via finger from [EMAIL PROTECTED]
clue++; | http://puck.nether.net/~jared/ My statements are only mine.
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