ASR 1K SFP Connectivity Issue

[Vishal Kolamkar]

We are commisining new link on our router. SFP is connected but not coming up. Here is the interface ststus. Is this physical connectivity problem ot configuration negotion issue?

Thsi is a ASR 1K. I guess if its a physical coneectivty issue does it show notconnecte on the line in bracket? Or on router it doesent please help.

ITV-GRW-INET-RTR1B#show int gigabitEthernet 0/1/2
GigabitEthernet0/1/2 is down, line protocol is down
  Hardware is SPA-5X1GE-V2, address is f866.f2aa.e941 (bia f866.f2aa.e892)
  Description: ** Part of ether-channel to 6DG internet **
  MTU 1500 bytes, BW 1000000 Kbit/sec, DLY 10 usec,
     reliability 255/255, txload 1/255, rxload 1/255
  Encapsulation ARPA, loopback not set
  Keepalive not supported
  Full Duplex, 1000Mbps, link type is auto, media type is SX
  output flow-control is on, input flow-control is on
  ARP type: ARPA, ARP Timeout 04:00:00
  Last input never, output never, output hang never
  Last clearing of "show interface" counters never
  Input queue: 0/375/0/0 (size/max/drops/flushes); Total output drops: 0
  Queueing strategy: fifo
  Output queue: 0/40 (size/max)
  5 minute input rate 0 bits/sec, 0 packets/sec
  5 minute output rate 0 bits/sec, 0 packets/sec
     0 packets input, 0 bytes, 0 no buffer
     Received 0 broadcasts (0 IP multicasts)
     0 runts, 0 giants, 0 throttles
     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
     0 watchdog, 0 multicast, 0 pause input
     0 packets output, 0 bytes, 0 underruns

[rvarelac]

Hi raiden1987 ,

Have you checked all the physical possibilities ? 

 - Bad cables

  -  Bad SFP.

 - Bad port

Have you checked the other side , if it is connected ?

If everything seems fine , you may need to open a TAC case in order to  investigate deep the issues with Hardware team  or end up in a RMA.

Hope this helps.

-Randy -

[kka]

If your SFP has DOM support, you can verify the optical receive-signal from the other side. This is independant of establishing a link:

xxx#sh hw-module subslot 0/0 transceiver 0 status 
The Transceiver in slot 0 subslot 0 port 0 is enabled.
  Module temperature                        = +39.164 C
  Transceiver Tx supply voltage             = 3298.5 mVolts
  Transceiver Tx bias current               = 19904 uAmps
  Transceiver Tx power                      = -5.5 dBm
  Transceiver Rx optical power              = -12.4 dBm

For 1000Base-SX you should have a signal above -17 dBm. Levels below -30 dBm are typically interchanged (or broken) fibers.