SFP Connection issue

[Remon Adel]

Dear all
i have aproblem with sfp in my network

My Network topology





LINK between GI 8/1  and DS1  is Good
LINK Between GI 7/1 and DS 2 doesn't work



MLS#show interfaces status
Port         Name               Status       Vlan       Duplex  Speed Type
Gi7/1        '2 _DS'           notconnect   1            full   1000 1000BaseSX
Gi8/1        '1 _DS'           connected    trunk        full   1000 1000BaseSX

MLS#show diagnostic status

<BU> - Bootup Diagnostics, <HM> - Health Monitoring Diagnostics,
<OD> - OnDemand Diagnostics, <SCH> - Scheduled Diagnostics

====== ================================= =============================== ======
Card   Description                       Current Running Test            Run by
------ --------------------------------- ------------------------------- ------
7      Supervisor Engine 720 (Active)    N/A                             N/A

8      Supervisor Engine 720 (Hot)       N/A                             N/A

9      CEF720 48 port 10/100/1000mb Ethe N/A                             N/A

12     CEF720 48 port 10/100/1000mb Ethe N/A                             N/A
 

MLS#show running-config interface gigabitEthernet 8/1
Building configuration...

Current configuration : 131 bytes
!
interface GigabitEthernet8/1
 description '1_DS'
 switchport
 switchport trunk encapsulation dot1q
 switchport mode trunk
end
 

MLS#show running-config interface gigabitEthernet 7/1
Building configuration...

Current configuration : 131 bytes
!
interface GigabitEthernet7/1
 description '2_DS'
 switchport
 switchport trunk encapsulation dot1q
 switchport mode trunk
end

ON DS2 Switch 
DS2#show interfaces status
Gi0/21                       notconnect   1            auto   auto 1000BaseSX SFP

DS2#show inventory
NAME: "1", DESCR: "WS-C2960G-24TC-L"
PID: WS-C2960G-24TC-L  , VID: V02, SN: FOC1033X1TM

NAME: "GigabitEthernet0/21", DESCR: "1000BaseSX SFP"
PID:                     , VID:    , SN: FNS12390YCR


 

DS2#show running-config interface gigabitEthernet 0/21
Building configuration...

Current configuration : 76 bytes
!
interface GigabitEthernet0/21
 switchport mode trunk
 media-type sfp
end

[Marvin Rhoads]

If your transceiver at either end supports DOM (Digital Optical Monitoring) try:

show interface <int number> transceiver detail

That will tell you the sent and received optical power levels (among other things).

[Remon Adel]

the output of this command on three switchs


MLS#show interfaces gigabitEthernet 8/1 transceiver detail
Diagnostic Monitoring Data is not available.


DS2#show interfaces gigabitEthernet 0/21 transceiver detail
"here there in no any output but on DS1 switch there is this output "Diagnostic Monitoring is not implemented."... Although there are the same model"

DS1#show interfaces gigabitEthernet 0/21 transceiver detail
Diagnostic Monitoring is not implemented.

[Marvin Rhoads]

Ah - too bad you don't have DOM-capable transceivers.

Has the connection ever worked? If so (or even if not) I would try cleaning all the patches and reseating them.

If it has never worked, I would check back with your cabling vendor and have them check the path end to end using a test kit.

[24madaeve1]

Hi Marvin,

I have an issue in my data center, could you please me help out.

I have Cisco ASR1006 router in my data center and a 100Mpbs WAN link (over OFC) is coming from my ISP to my premises. The issue is my ISP is having 100BaseFx module at its end and I am having 1000BaseFx modules in my router. How should I terminate the OFC on my router as 100BaseFx are 1000BaseFx are incompatible ? Please recommend any SFP which I could use at my end in order to terminate the OFC directly on my router. 

[Leo Laohoo]

I have already responded to your THREAD.

[Tom Randstrom]

Can you swap the SFPs from GI 8/1 <--> GI 7/1 and DS 1 <--> DS 2?  This will confirm if the SFPs are all functional.