[c-nsp] 7301 - copper vs fibre port throughput

[Lee]

On 9/1/14, Tom Storey <tom at snnap.net> wrote:
>
> The other end was a Cisco 3750 switch. Originally just a straight
> copper patch, but with only 10/100 ports on the 3750 it autoneg'd at
> 100/full on both ends just fine

>>> After moving the ISP link over to fibre, the throughput shot up to
>>> 500-600mbit (NATed.)

fibre port is 1Gb, right?

Lee


>
> They are happy with the fibre uplink and will leave it that way. I was
> hoping someone might have been aware of some kind of obvious
> limitation of the copper ports or something.
>
>
> On 31 August 2014 22:39, Łukasz Bromirski <lukasz at bromirski.net> wrote:
>>
>> On 31 Aug 2014, at 23:00, Tom Storey <tom at snnap.net> wrote:
>>
>>> Hi all.
>>>
>>> Been watching a thread on a forum where someone using a 7301 was
>>> suffering rather lousey speeds through a 7301 when using an onboard
>>> copper port between him and his ISP - only able to obtain about 25mbit
>>> or so of throughput (all traffic NATed.)
>>>
>>> After moving the ISP link over to fibre, the throughput shot up to
>>> 500-600mbit (NATed.)
>>>
>>> Theres not much room for playing around with the setup at this stage,
>>> but does anyone have any ideas why this might be so?
>>>
>>> The onboard ports are all gigabit as far as I know, whether or not you
>>> use copper or fibre, and the copper port augo negotiated at 100/full
>>> with the remote device so I cant think of a reason for the disparity.
>>
>> And how was the fiber connected on the other end?
>>
>> It looks like problem with the autonegotiation. Or maybe flow
>> control - is the remote device using fiber natively and going
>> to copper through some intermediate converter? Those can cause
>> such problems also.
>>
>> We need way more info to get this through troubleshooting. Or maybe
>> they should involve TAC?
>>
>> --
>> "There's no sense in being precise when |               Łukasz Bromirski
>>  you don't know what you're talking     |      jid:lbromirski at jabber.org
>>  about."               John von Neumann |    http://lukasz.bromirski.net
>>
>
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