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Gmane
From: Doug Warner <doug <at> warner.fm>
Subject: Re: S50n w/ 10ge Input CRCs/Discards
Newsgroups: gmane.network.nsp.force10
Date: Saturday 30th April 2011 13:50:45 UTC (over 5 years ago)
We're using SR optics for a short run (~3m).

-Doug

On 04/29/2011 02:54 PM, Leslie wrote:
> Are you using LR optics and it's a short run? I've found f10 lr xfp's to
be
> finicky if they're receiving above -4db
> 
> Leslie
> 
> Sent from the road while on tour.
> 
> On Apr 29, 2011 10:53 AM, "Marcus Stoegbauer"  > wrote:
>> On 28.04.11 17:12, Doug Warner wrote:
>>> We're trying to deploy 10ge upstream to our S50n stack (read, all the
port 0
>>> modules are stacking modules). We're seeing a decent amount of Input
>>> CRCs/Discards and can't get the link to go > ~120Mbps. We've replaced
>>> *everything* in this link (other than the upstream RSP) -- fiber, 10ge
module,
>>> XFPs and are still seeing this problem. Flow control is off on both
ends; CPU
>>> seems fairly low (<12%).
>>>
>>> Any ideas on what might be going on here? Anyone else having problems
w/ 10GE
>>> on S50?
>>
>> We used to have 10GE on one S50n (no stack), but only moderate traffic
>> levels - around 1.2 Gbps. The other side was a S25p, no noticeable
>> problems/packet loss with this setup.
>>
 
CD: 3ms