[c-nsp] The myths of autonegotiate vs forced (was: full duplex mismatch speed - dynamips)

[Derick Winkworth]

This could lead to some frustration when connecting to devices with auto-mdi... 
as auto-neg is required for auto-mdi to work...




________________________________
From: Tassos Chatzithomaoglou <achatz at forthnet.gr>
To: cisco-nsp at puck.nether.net
Sent: Fri, August 20, 2010 11:38:34 AM
Subject: Re: [c-nsp] The myths of autonegotiate vs forced (was: full duplex 
mismatch speed - dynamips)

We have EoSDH equipment (by NSN) which is indeed not able to auto-negotiate.
The strange thing is that older cards supported auto-negotiation, while 
newer ones do not

--
Tassos


Andriy Bilous wrote on 20/08/2010 13:45:
> I started to believe after your post that it could be true as we have
> the same hand over from our EoSDH. That is on fiber and having speed
> nonegotiate on those ports annoys the hell out of me.
>
> Another case - multispeed media-converters which are rare guest by
> ISPs I guess. The lack of optical sockets on old ISRs forced many
> people to use them and having autoneg there isn't the best thing one
> could do.
>
>
> On Fri, Aug 20, 2010 at 10:20 AM, Mark Tinka<mtinka at globaltransit.net>  wrote:
>    
>> On Friday, August 20, 2010 03:34:24 pm Mikael Abrahamsson
>> wrote:
>>
>>      
>>> +1 on the "use autoneg unless you really have to force
>>> duplex".
>>>        
>> We have a customer that connects to us over Gig-E, but their
>> end is an EoSDH implementation.
>>
>> As it were, that SDH box either won't auto-neg (which I
>> can't believe), or they're too scared to make it so.
>>
>> They're just about the only customer we're hard-coding for,
>> and less than 1% of our customers don't connect to us via
>> Ethernet.
>>
>> Mark.
>>
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>>      

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