[c-nsp] GBIC requires restart after link loss

[Martin T]

Jeff,
port Gi3/4 in WS-C4506 wasn't errdisabled. Port status was
"notconnect". Once I did "shutdown" and "no shutdown" to port Gi3/4 in
WS-C4506 port status changed to "connected".


FF,
if TAC replaces such GBIC's for free, Cisco has probably documented
and acknowledged this problem- is there an official TAC document for
this?


Quinn,
Thank you for this! Description of bug "CSCti80308" is "On reloading
Catalyst 4500 series switch, Catalyst 3xxx switches connected to
WS-X4448-GB-SFP may get err-disabled", but the WS-C4506 didn't reload
and WS-C4506 port facing the WS-C2960G-24TC-L flapped only two times.
I mean there were no errdisabled port on neither side.


regards,
martin


2011/10/4 quinn snyder <snyderq at gmail.com>:
> check into the following bug
> bug id: CSCti80308
> i have hit this in other c4k chassis with different cards, but the result is
> the same.
> regards,
> q.
> -= sent via ipad. please excuse brevity, spelling, and grammar =-
> On Oct 3, 2011, at 17:55, Martin T <m4rtntns at gmail.com> wrote:
>
> I have a following setup:
>
> WS-C2960G-24TC-L[Gi0/22] <-> [Gi3/4]WS-C4506
>
> SFP in WS-C2960G-24TC-L is a noname 1000BASE-LX10 transceiver working
> thanks to "service unsupported-transceiver". GBIC in WS-C4506 is an
> Avago AFCT-5611Z 1000BASE-LX10. Linecard model in WS-C4506 is
> WS-X4306-GB.
>
> I had a situation where WS-C2960G-24TC-L reloaded, but link between
> WS-C2960G-24TC-L and WS-C4506 did not came up until I did "shutdown"
> and "no shutdown" to port Gi3/4 in WS-C4506. I have seen similar
> behaviour with GBIC transceivers on WS-X4306 linecard as well(in
> another WS-C4506) and for example in case there is a fibre cut between
> the switches, once the cable is repaired, sometimes one needs to make
> "shutdown" and "no shutdow" to GBIC port in order for line protocol to
> come up.
>
> As I understand, in case there is no Rx signal to the GBIC, the Tx is
> still operational(tested this with light meter and in case of
> 1000BASE-SX one is even able to see the red light constantly on) and
> both ends should see each other.
>
>
> Anybody else seen something like this? What might be the reason behind
> this behaviour? How common is this with SFP's? Are there GBIC's with
> chip set design preventing such problems?
>
>
> regards,
> martin
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