From: Joseph Brunner (joe@affirmedsystems.com)
Date: Mon Oct 01 2007 - 14:48:12 ART
Is it possible you are using/getting fake sfp's ?
Have you verified them with Cisco as genuine?
It may be time to blame China again...
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Felix Nkansah
Sent: Monday, October 01, 2007 1:26 PM
To: Cisco certification
Subject: Re: Catalyst/Fiber Backbone Connectivity Problem
HI,
We have replaced the SFPs on both switches about twice so far. The problem
still persists nevertheless.
Frederick had suggested seeing my interface configs. They are as below:
3750
interface GigabitEthernet1/0/26
no switchport
ip address 10.5.50.2 255.255.255.0
ip ospf authentication message-digest
ip ospf message-digest-key 3 md5 7 0216054818
storm-control broadcast level 5.00
storm-control multicast level 5.00
end
6509
interface GigabitEthernet4/1
ip address 10.5.50.1 255.255.255.0
ip ospf authentication message-digest
ip ospf message-digest-key 3 md5 7 095C4F1A0A
end
And thanks Marcus for your suggestion on Cisco-NSP. Would follow up with
that too.
Regards,
Felix
On 10/1/07, Marcus Lasarko <mlasarko@baltimorecountymd.gov> wrote:
>
> Greetings Felix,
> As you are powering the SFP on and off this may be a result of
> failing/failed optics.
> Depending on the span distance and type of SFP this could be tricky to
> diagnose.
> Do you have a spare SFP that you can swap out, one-at-a-time?
> I would also recommend bouncing this off the Cisco-NSP list.
> Best,
> ~M
>
>
> >>> "Felix Nkansah" <felixnkansah@gmail.com> 10/1/2007 12:52 PM >>>
> A client of mine has a fiber backbone between two buildings on their
> campus.
>
>
> The fiber terminates on a Catalyst 6509 (at the data centre) and a
> Catalyst
> 3750 at the other end. Users at the far-end connect to servers located at
> the data center over this fiber.
>
> This connection has been working fine for the past 2 years, until a recent
> problem came up.
>
> For two weeks now, the usual occurrence is for the fiber link to stop
> passing traffic while working until the 3750 is rebooted or the fiber
> connectors removed from the SFP port and replugged, or the interface is
> administratively shut down n un-shut.
>
> Meanwhile, the interface and line protocol remain UP on both switches
> during
> this abnormal behaviour. There are also no log messages occurring.
> Everything look fine on both switches. They just wouldnt pass traffic. The
> problem occurs about twice each day.
>
> It's difficult diagnosing the problem now. I need help pls.
>
> Regards,
>
> Felix
>
> _______________________________________________________________________
> Subscription information may be found at:
> http://www.groupstudy.com/list/CCIELab.html
This archive was generated by hypermail 2.1.4 : Fri Nov 16 2007 - 13:11:11 ART