[c-nsp] ASR920 drops despite policy-map

Jason Lixfeld jason at lixfeld.ca
Mon Jun 6 10:56:38 EDT 2016


These are all optical fibre, so duplex/autoneg isn’t really a factor; the links are up :)

I’ll give everything another good cleaning and a scope.

> On Jun 6, 2016, at 10:54 AM, Juergen Marenda <cnsp at marenda.net> wrote:
> 
> 
> Start at Layer 0+1...
> Sure that the links are all full-duplex , esp. to the test-loop ?
> If half-duplex, then youll see collisions.
> (and autoneg'ed an both sides shows same result, on all links ?)
> 
> (just as a starting point, before checking higher levels
> And doing days off dbugging: eliminate bad cable/transiever...)
> 
> Juergen.
> 
>> [...]
>> It’s a pretty simple topology.  Gi0/0/22 on each A920 is connected to an Exfo test set.  Gi0/0/23 on each A920 is connected to the other.  I’ve got an EoMPLS PW connecting Gi0/0/22 on both devices.
>> 
>> Exfo Tester - gi0/0/22 - ASR920-1 - gi0/0/23 - gi0/0/23 - ASR920-2 - gi0/0/22 - Exfo Loopback
>> 
>> The Exfo transmitted 45469372 packets during the test, and I’m seeing output drops on ASR920-1 Gi0/0/23.
>> 
>> There’s no other traffic going across this box, except for ISIS and BFD, but I highly doubt this would contribute to 2.1 million dropped packets.
>> [...]
> 



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