[119665] in North American Network Operators' Group
Re: Having trouble trying to activate a GigE connection>
daemon@ATHENA.MIT.EDU (=?UTF-8?Q?Peter_Sandstr=C3=B6m?=)
Wed Nov 25 13:40:13 2009
In-Reply-To: <9F285BFE1D7757499D9FF095B4EE347D0490FA5F@tw-xchange01.TWC.local>
Date: Wed, 25 Nov 2009 10:39:23 -0800
From: =?UTF-8?Q?Peter_Sandstr=C3=B6m?= <peter@stardoll.com>
To: Michael Ruiz <mruiz@telwestservices.com>
Cc: nanog@nanog.org
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
I have seen this behavior caused by a mismatch of SFPs, SX on one side
and LX on the other.
/p
On Tue, Nov 24, 2009 at 9:04 AM, Michael Ruiz <mruiz@telwestservices.com> w=
rote:
>>I don't think there is any reason to have hard-set speed and duplex,
>>particularly between two Cisco's. =C2=A0Why not just set *both* sides (yo=
u
>>can't set just one) to auto-negotation - 'no speed nonegotiate' on the
>>7606 side. =C2=A0Is this a straight shot, single fiber pair between the t=
wo
>>or are there intermediate junctions or optics? =C2=A0It sounds like you h=
ave
>>questionable fiber or optics in the path. =C2=A0It could be the fiber its=
elf
>>or the GBICs on either side.
>
> Mike,
>
> =C2=A0 =C2=A0 =C2=A0 =C2=A0I tried setting the 7206 to auto, and the 7606=
to nonnegtiate,
> however, no dice. =C2=A0We put light meter on both ends of the GBIC and l=
ight
> readings are at -20, which are applicable. Between the two routers are
> MMF and it is straight shot with no transport equipment in between.
>
> -----Original Message-----
> From: Michael K. Smith - Adhost [mailto:mksmith@adhost.com]
> Sent: Tuesday, November 24, 2009 10:25 AM
> To: Michael Ruiz; nanog@nanog.org
> Subject: RE: <Help --> Having trouble trying to activate a GigE
> connection>
>
> Hello Michael:
>
>> -----Original Message-----
>> From: Michael Ruiz [mailto:mruiz@telwestservices.com]
>> Sent: Tuesday, November 24, 2009 8:02 AM
>> To: nanog@nanog.org
>> Subject: <Help --> Having trouble trying to activate a GigE
> connection>
>>
>> Group,
>>
>>
>>
>> =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 I am having an i=
ssue with activating a Gige interface
>> between a Cisco 7206 VXR w/IO-1GE module to a 7606 w/sup720-3bxls
>> connecting to a line module WS-X6416-GBIC. =C2=A0I have verified that th=
e
>> GBIC-MMF have good light reading and the MMF fiber jumper are not
>> reversed. =C2=A0The GigE connection comes up briefly for about a few
>> seconds,
>> takes a burst of errors and goes down. =C2=A0I have tried to set the spe=
ed
>> to
>> nonegotiate on both ends, set one end to speed auto. =C2=A0No dice. =C2=
=A0Here
> is
>> the copy of the configuration. =C2=A0On my 7606 I show that the GigE
>> interface is up/up but on the 7206vxr I show down/down. =C2=A0Any help w=
ill
>> be greatly appreciated. =C2=A0Thanks!
>>
>>
>>
> I don't think there is any reason to have hard-set speed and duplex,
> particularly between two Cisco's. =C2=A0Why not just set *both* sides (yo=
u
> can't set just one) to auto-negotation - 'no speed nonegotiate' on the
> 7606 side. =C2=A0Is this a straight shot, single fiber pair between the t=
wo
> or are there intermediate junctions or optics? =C2=A0It sounds like you h=
ave
> questionable fiber or optics in the path. =C2=A0It could be the fiber its=
elf
> or the GBICs on either side.
>
> Regards,
>
> Mike
>
>
--=20
Peter Sandstr=C3=B6m
Head of Operations, Stardoll AB
phone: +46 (0)70 456 05 28
e-mail: peter@stardoll.com | stardoll: pj0tr
mail/visit: Hudiksvallsgatan 8, 113 30 Stockholm, Sweden
www.stardoll.com - Fame, fashion and friends
