[c-nsp] SFP, ZX and 12.2(18)SXE

[Hank Nussbacher]

At 10:16 AM 28-12-05 +0000, Marko Milivojevic wrote:

>         One thing that we always do on our GigE connections is "speed 
> nonegotiate"
>in the interface config, as we have not been able to make our GigE links
>reliably come up otherwise.

I tried changing the setting "speed nonegotiate" and "no speed nonegotiate" 
but the output of 'sho int capab module 7' *always* shows nonegotiate:

GigabitEthernet7/2
   Dot1x:                 yes
   Model:                 WS-SUP720-3BXL
   Type:                  1000BaseZX
   Speed:                 1000
   Duplex:                full
   Trunk encap. type:     802.1Q,ISL
   Trunk mode:            on,off,desirable,nonegotiate  <-----
                                           -----------

I found CSCsc25558 but that is for 2950s.  I did find CSCdz37366:

"GBIC ports on cat6000 running native IOS code may report under "show 
interfce" link type as "autonegotiate", even it is configured for 
nonegotiate mode.  The interface still operates in nonegotiate mode. This 
is a cosmetic issue." but that was supposedly fixed in 12.1(13.5)E01

Is this the same as what you see?

Also if you do "speed nonegotiate", according to CSCdv29722, "When using 
the speed nonegotiate to disable autonegotiation  on a GBIC interface, the 
interface may indicate that the physical link is up even when it is not 
connected.

Background information:
Link failure detection is directly tied into the autonegotiation
state machine in the 3550 hardware; when autonegotation is disabled,
this disables the hardware's ability to detect link up/down transitions."

How do you live with this if you never see a link failure?

Thanks,
Hank



>Marko.
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