Setting up Cisco TenGig ethernet SFP on ASR 1001-x

10gbasecisco-asrsfp

I'm having trouble with what should be a simple config setting up a 10GigE SFP on an ASR-1000-x. A fiber patch is connected to the SFP sitting in the TE0 port of the device. The interface reports being up, and lower level probing of the subsystems show that the photons are flowing (i think):

router-asr1001-r0101-a#sh hw-module subslot 0/0 transceiver 0 status 
The Transceiver in slot 0 subslot 0 port 0 is enabled.
  Module temperature                        = +37.039 C
  Transceiver Tx supply voltage            = 3261.4 mVolts
  Transceiver Tx bias current              = 36000 uAmps
  Transceiver Tx power                      = -4.7 dBm
  Transceiver Rx optical power              = -3.9 dBm

this is the SFP:

router-asr1001-r0101-a#sh hw-module subslot 0/0 transceiver 0 idprom 
IDPROM for transceiver TenGigabitEthernet0/0/0:
  Description                              =  optics (type 130)
  Transceiver Type:                        = SFP+ 10GBASE-LR (274)
  Product Identifier (PID)                  = SFP-10G-LR          
  Vendor Revision                          = B 
  Serial Number (SN)                        = FNS17031564    
  Vendor Name                              = CISCO-FINISAR  
  Vendor OUI (IEEE company ID)              = 00.0B.40 (2880)
  CLEI code                                = COUIA75CAA
  Cisco part number                        = 10-2457-03
  Device State                              = Enabled.
  Date code (yy/mm/dd)                      = 15/08/11
  Connector type                            = .
  Nominal bitrate                          =  (0 Mbits/s)
  Minimum bit rate as % of nominal bit rate = not specified
  Maximum bit rate as % of nominal bit rate = not specified

Finally the interface at the upper level reports:

router-asr1001-r0101-a#show int tengig 0/0/0
TenGigabitEthernet0/0/0 is up, line protocol is up 
  Hardware is BUILT-IN-2T+6X1GE, address is 188b.9d1f.f400 (bia 188b.9d1f.f400)
  Description: Link to XO
  Internet address is 200.1.95.02/30
  MTU 1500 bytes, BW 10000000 Kbit/sec, DLY 10 usec, 
     reliability 255/255, txload 1/255, rxload 1/255
  Encapsulation ARPA, loopback not set
  Keepalive not supported 
  Full Duplex, 10000Mbps, link type is force-up, media type is SFP-LR
  output flow-control is on, input flow-control is on
  ARP type: ARPA, ARP Timeout 04:00:00
  Last input never, output 00:06:11, output hang never
  Last clearing of "show interface" counters 4d01h
  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
     156 output errors, 0 collisions, 3 interface resets
     0 unknown protocol drops
     0 babbles, 0 late collision, 0 deferred
     0 lost carrier, 0 no carrier, 0 pause output
     0 output buffer failures, 0 output buffers swapped out

The handoff has been confirmed to be 10GigE by the carrier. And they confirm that they are up and see us go down when we disconnect the fiber patch.

Trying to ping the remote end (200.1.95.1) does not work. I suspect two things here – the output errors, and the link-type being "forced up". I also suspect this is something simple that I've overlooked in the basic setup.

Does anybody have any experiencing troubleshooting this kind of setup?

Best Answer

Problem solved: Somewhere along the troubleshooting path the SFP was removed and reinserted without rebooting the router. We tried a reboot today and the interface came up successfully. I don't know if this is a documented behavior or not, but it makes sense - try a reboot if all else fails.

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