Cisco Catalyst 2960S-48FPS-L connected via fiber to Allied Telesis AT-9924SP

[DavidReisner]

Hello,

I want to connect a Catalyst 2960s-48FPS-L switch via SFP trancievers to an AT-9924SP switch. I have a Cisco GLC-FE-100FX tranciever in the Cisco and an  AT-SPFX/2 100FX tranciever in the Allied Telesis.

Here is my problem:

RTS-SW4A-01#show int gi 1/0/52

GigabitEthernet1/0/52 is up, line protocol is up (connected)

  Hardware is Gigabit Ethernet, address is **omitted**

  MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,

     reliability 255/255, txload 1/255, rxload 1/255

  Encapsulation ARPA, loopback not set

  Keepalive not set

  Full-duplex, 100Mb/s, link type is auto, media type is 100BaseFX-FE SFP

  input flow-control is off, output flow-control is unsupported

  ARP type: ARPA, ARP Timeout 04:00:00

  Last input never, output 00:00:10, output hang never

  Last clearing of "show interface" counters never

  Input queue: 0/75/0/0 (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 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 input packets with dribble condition detected

     634 packets output, 68098 bytes, 0 underruns

     0 output errors, 0 collisions, 1 interface resets

     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

They don't talk. There are no input packets only output. So the Cisco is sending but not  getting any replies. If I use an eithernt cable I can talk to the network just fine(through a different switch because the AT in question is fiber only).

Any ideas on what to try? any help would be appreciated!

Thanks

[cadoimnoc]

You should also try using the same Cisco brand GBIC in both switches.

Sent from Cisco Technical Support iPad App

[jimmysands73_2 · Accepted solution]

Have you considered testing the fiber port on the Cisco device?  On the allied side do you have a cisco sw to plug in and connect via fiber so we can guarantee the fiber line is working with devices everyone here is comfortable with (minus Ryan who knows both)?  Just a thought.  The Cisco side has never recvd any packets this entire time, lets verity that works.

[DavidReisner]

It works!!!!!!! It's ALIIIIIIIIIIIIIIIIIIIVE!!!!!!!  Finally! So I wanted to test the tranciever in other ports on the 2960s and in another switch as Jimmysands recommended. I moved the transciever to port gi 51 on the 2960s and rebooted the 9924s. Boom! it started receiving input packets immediately. Then after setting the proper native vlan I could then talk to the whole network and internet from the switch. I'm actually updating this discussion thorugh the fiber connection in question.

Thanks everyone for the ideas and the help. I really appreciate it.