C2960X to ASR9010 link not up

[lwlim8888]

Hi,

I have a pair of WS-C2960X-48TS-L switches and an ASR9010 router. All switches and ASR9010 router are using GLC-SX-MMD SFP.

I have connected C2960X uplink SFP to ASR9010 SFP using multi-mode Fiber, and I can observe that the link was up from ASR9010. But the link is shown as 'down/notconnect' when show the interface on C2960X.

I have tried to use the same Fiber cable to connect between two C2960X and the link was up.

Strange enough is that I could observe the Fiber power reading from C2960X even-though the interface is down when connected to ASR9010.

C2960X is running 15.0(2)EX5 IOS and ASR9010 is running IOS-XR 5.2.2

Appreciate for any thought to this issue.

Switch#sh int gi1/0/49 transceiver 
ITU Channel not available (Wavelength not available),
Transceiver is internally calibrated.
If device is externally calibrated, only calibrated values are printed.
++ : high alarm, +  : high warning, -  : low warning, -- : low alarm.
NA or N/A: not applicable, Tx: transmit, Rx: receive.
mA: milliamperes, dBm: decibels (milliwatts).

                                 Optical   Optical
           Temperature  Voltage  Tx Power  Rx Power
Port       (Celsius)    (Volts)  (dBm)     (dBm)
---------  -----------  -------  --------  --------
Gi1/0/49     24.3       3.29      -4.9      -5.6   

Thank you

[Leo Laohoo]

All switches and ASR9010 router are using GLC-SX-MMD SFP.

GLC-SX-MMD is NOT compatible with ASR 9K.   SFP-GE-S is required for ASR 9K for multi-mode.  Go HERE and refer to Table 5

[lwlim8888]

Hi Leo,

I'm not sure if I'm missing something, based on the document which you'd provided, GLC-SX-MMD= is supported on ASR9000 series.

Regards

[Leo Laohoo]

Can you loop the fibre optic and see if the link goes up?

[Evgeniy Prichinin · Accepted solution]

on ASR9k

try this command.

negotiation auto

[Madhukrishnan Gopinathan Nair]

I agree with Evgeniy to try 

negotiation auto    on ASR9k

Since it has negotition turned off by default. Check using 

sh controller <int>

It will show hardware negotiation on/off. If config change on ASR is not possible for you, turn off negotiation on 2960

speed nonegotiate

Hope this helps 

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Thanks,

Madhu

[lwlim8888]

Thank you guys, I have tried the 'negotiation auto' command and its working now.