Unable to Link 1G to 1G SFP between ASR 920 12 and ASR 920 24

[TrivialPants]

Hi All,

I am unable to link a 24 port ASR 920 with just a 1G port open using a 1G SFP optic (tried BXU, LH, and ZX) all are showing light on the rx/tx lights and I am just leaving the config as default.

The other end is a 12 port ASR 920 which only has a TenGiG slot which is auto negotiated to 1Gbps with the same optics on the other end, but it is failing to link.

Here is the show int summary for each side using the ZX optics:

gi0/0/1 is the 24 port 920 and te0/0/15 is the 12 port 920

		GigabitEthernet0/0/1 is down, line protocol is down
  Hardware is 24xGE-4x10GE-FIXED, address is 6cab.05d9.8d81 (bia 6cab.05d9.8d81)
  MTU 1998 bytes, BW 1000000 Kbit/sec, DLY 10 usec,
     reliability 255/255, txload 1/255, rxload 1/255
  Encapsulation ARPA, loopback not set
  Keepalive set (10 sec)
  Full Duplex, 1000Mbps, link type is auto, media type is ZX
  output flow-control is unsupported, 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
     0 output errors, 0 collisions, 7 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

	TenGigabitEthernet0/0/15 is down, line protocol is down	
  Hardware is 12xGE-4x10GE-FIXED, address is 843d.c679.5a8f (bia 843d.c679.5a8f)	
  MTU 1998 bytes, BW 1000000 Kbit/sec, DLY 10 usec,	
     reliability 255/255, txload 1/255, rxload 1/255	
  Encapsulation ARPA, loopback not set	
  Keepalive set (10 sec)	
  Full Duplex, 1000Mbps, link type is auto, media type is ZX	
  output flow-control is unsupported, 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	
     0 output errors, 0 collisions, 9 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	

[balaji.bandi]

Can you post  show run from bot the devices ?

GigabitEthernet0/0/1

TenGigabitEthernet0/0/15

How is the connection between these ? via provider, as i see it was ZX SFP ?

First check Physical Patches ? if that is good and confirmed, try below command.

Try below both side and check

Interface GigabitEthernet0/0/1

speed nonegotiate

[TrivialPants]

interface TenGigabitEthernet0/0/15
no ip address
negotiation auto
end

interface GigabitEthernet0/0/1
no ip address
negotiation auto
end

I am unable to enter speed no negotiate into the ASR 920 configuration

[balaji.bandi]

Both are ASR ?

Router(config-if)# no negotiation auto

or try below options : (Configuring an Interface)

https://www.cisco.com/c/en/us/td/docs/routers/asr920/configuration/guide/chassis/16-12-1/b-Chassis-Guide-xe-16-12-asr920/b-Chassis-Guide-xe-16-11-asr920_chapter_01011.html

[TrivialPants]

Hi,

Yes, both are ASR 920 platform devices. Running 16.9.X

I could not get the 12 port to link on the tenGig port to the 24 port’s 1Gig port. Both using 1Gbps SFP.

I was able to move the port to a 1Gbps SFp port. After moving to a 1Gbps port they linked together using the same optics.

[balaji.bandi]

You can try making port speed 1000 and test it should work as expected, but glad to know it was resolved.

[EdgarsBricis]

Do you have on ASR-920-12 some extension module inserted in A900-IMA-Blank?

[TrivialPants]

Hi EdgarsBricis,

No I do not have an extension/add-on card in the IMA slot. The router is a 12GE and 4-10GE model.