3750 Connectivity issue

[keith.mckay]

I have a WS-C2960G-24TC-L

with a 1000base LX SFP

connected via single mode to an Incomming gigabit circuit from SSE/Telco (Scottish and Southern Electric)

this configuration works ok.

When i move the connection to a WS-C3750G-24TS-1U (with the same sfp) i get no connectivity, no physical or anything,
has anyone seen this before when i do a show interface it does nothing, not connected etc.

Any top tips and handy hots would be appreciated

Keith

[Nagaraja Thanthry]

Hello,

Can you post the output of "show interface " from both

switches with the SFP in the slot?

Regards,

NT

[keith.mckay]

sh int gi0/22

GigabitEthernet0/22 is up, line protocol is up (connected)

  Hardware is Gigabit Ethernet, address is 0023.052b.a096 (bia 0023.052b.a096)

  MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec,

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

  Encapsulation ARPA, loopback not set

  Keepalive not set

  Full-duplex, 1000Mb/s, link type is auto, media type is 1000BaseLX SFP

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

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

  Last input 00:00:09, output 00:00:00, 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 108000 bits/sec, 64 packets/sec

     112643 packets input, 51674930 bytes, 0 no buffer

     Received 54673 broadcasts (0 multicasts)

     0 runts, 0 giants, 0 throttles

     1 input errors, 1 CRC, 0 frame, 0 overrun, 0 ignored

     0 watchdog, 54638 multicast, 0 pause input

     0 input packets with dribble condition detected

     56007230 packets output, 26626201288 bytes, 0 underruns

     0 output errors, 0 collisions, 5 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

-------------------------------------------------------------------------------------------------

sh int gi1/0/25                          
GigabitEthernet1/0/25 is down, line protocol is down (notconnect)                                                                
  Hardware is Gigabit Ethernet, address is 2893.fe02.5119 (bia 2893.fe02.5119)                                                                             
  MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec,                                              
     reliability 255/255, txload 1/255, rxload 1/255                                                   
  Encapsulation ARPA, loopback not set                                     
  Keepalive not set                  
  Auto-duplex, Auto-speed, link type is auto, media type is 1000BaseLX SFP
  input flow-control is off, output flow-control is unsupported
  ARP type: ARPA, ARP Timeout 04:00:00
  Last input 21:19:20, output 21:19:20, 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
     21 packets input, 2890 bytes, 0 no buffer
     Received 21 broadcasts (0 multicasts)
     0 runts, 0 giants, 0 throttles
     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
     0 watchdog, 21 multicast, 0 pause input
     0 input packets with dribble condition detected
     22 packets output, 3480 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

[Leo Laohoo]

And this is the same on all 4 SFP ports of the 3750?

[Nagaraja Thanthry]

Hello,

Are you using the same SFP on both switches i.e. are you moving the SFP from the 2960 to 3750? If not, can you please try that. It could be a bad SFP issue. Also, if you are going via a patch panel for 3750, can you try bypassing the patch panel and see if that helps?

Regards,

NT

[keith.mckay]

Hi

There is no intermediate patching all connections are direct, same SFP is being used and has been tested in all ports.

Keith

[tprendergast]

Can you give us the make/model of the SFP?

Also, provide "show run int gi1/0/25" from the 3750, and "show run int gi0/22" of the 2960. Also provide "show ver" for both switches.

Thanks,

Tim

[keith.mckay]

interface GigabitEthernet1/0/25
switchport trunk encapsulation dot1q
switchport mode trunk
end

interface GigabitEthernet0/22
switchport mode trunk
end

#sh ver
Cisco IOS Software, C2960 Software (C2960-LANBASE-M), Version 12.2(35)SE5, RELEASE SOFTWARE (fc1)
Copyright (c) 1986-2007 by Cisco Systems, Inc.
Compiled Thu 19-Jul-07 20:06 by nachen
Image text-base: 0x00003000, data-base: 0x00D40000

ROM: Bootstrap program is C2960 boot loader
BOOTLDR: C2960 Boot Loader (C2960-HBOOT-M) Version 12.2(25r)SEE1, RELEASE SOFTWARE (fc1)

HC-HQ01-63 uptime is 35 weeks, 3 days, 20 hours, 30 minutes
System returned to ROM by power-on
System restarted at 13:21:43 UTC Sun Nov 29 2009
System image file is "flash:c2960-lanbase-mz.122-35.SE5/c2960-lanbase-mz.122-35.SE5.bin"

cisco WS-C2960G-24TC-L (PowerPC405) processor (revision E0) with 61440K/4088K bytes of memory.
Processor board ID FOC1233Y6P8
Last reset from power-on
1 Virtual Ethernet interface
24 Gigabit Ethernet interfaces
The password-recovery mechanism is enabled.

64K bytes of flash-simulated non-volatile configuration memory.
Base ethernet MAC Address       : 00:23:05:2B:A0:80
Motherboard assembly number     : 73-10015-06
Power supply part number        : 341-0098-02
Motherboard serial number       : FOC12335ZJ3
Power supply serial number      : AZS1230150B
Model revision number           : E0
Motherboard revision number     : A0
Model number                    : WS-C2960G-24TC-L
System serial number            : FOC1233Y6P8
Top Assembly Part Number        : 800-26673-03
Top Assembly Revision Number    : B0
Version ID                      : V03
CLEI Code Number                : COM3G00BRB
Hardware Board Revision Number  : 0x01

Switch   Ports  Model              SW Version              SW Image
------   -----  -----              ----------              ----------
*    1   24     WS-C2960G-24TC-L   12.2(35)SE5             C2960-LANBASE-M

Configuration register is 0xF

Cisco IOS Software, C3750 Software (C3750-IPSERVICES-M), Version 12.2(35)SE5, RELEASE SOFTWARE (fc1)
Copyright (c) 1986-2007 by Cisco Systems, Inc.
Compiled Thu 19-Jul-07 19:15 by nachen
Image text-base: 0x00003000, data-base: 0x01280000

ROM: Bootstrap program is C3750 boot loader
BOOTLDR: C3750 Boot Loader (C3750-HBOOT-M) Version 12.2(25r)SEE4, RELEASE SOFTWARE (fc1)

HC-INV10-01 uptime is 2 weeks, 1 day, 17 hours, 55 minutes
System returned to ROM by power-on
System image file is "flash:c3750-ipservices-mz.122-35.SE5/c3750-ipservices-mz.122-35.SE5.bin"

cisco WS-C3750G-24TS-1U (PowerPC405) processor (revision F0) with 118784K/12280K bytes of memory.
Processor board ID FOC1412Y4DD
Last reset from power-on
4 Virtual Ethernet interfaces
56 Gigabit Ethernet interfaces
The password-recovery mechanism is enabled.

512K bytes of flash-simulated non-volatile configuration memory.
Base ethernet MAC Address       : 28:93:FE:02:51:00
Motherboard assembly number     : 73-10219-07
Power supply part number        : 341-0098-02
Motherboard serial number       : FOC14114ZRC
Power supply serial number      : AZS14080139
Model revision number           : F0
Motherboard revision number     : F0
Model number                    : WS-C3750G-24TS-E1U
System serial number            : FOC1412Y4DD
Top Assembly Part Number        : 800-27484-01
Top Assembly Revision Number    : F0
Version ID                      : V03
CLEI Code Number                : CNMWZ00ARC
Hardware Board Revision Number  : 0x09

Switch   Ports  Model              SW Version              SW Image
------   -----  -----              ----------              ----------
*    1   28     WS-C3750G-24TS-1U  12.2(35)SE5             C3750-IPSERVICES-M
     2   28     WS-C3750G-24TS-1U  12.2(35)SE5             C3750-IPSERVICES-M

Switch 02
---------
Switch Uptime                   : 2 weeks, 1 day, 17 hours, 54 minutes
Base ethernet MAC Address       : FC:FB:FB:6D:EC:80
Motherboard assembly number     : 73-10219-07
Power supply part number        : 341-0098-02
Motherboard serial number       : FOC14124W74
Power supply serial number      : AZS141217YZ
Model revision number           : F0
Motherboard revision number     : F0
Model number                    : WS-C3750G-24TS-E1U
System serial number            : FOC1412Y4HA
Top assembly part number        : 800-27484-01
Top assembly revision number    : F0
Version ID                      : V03
CLEI Code Number                : CNMWZ00ARC

Configuration register is 0xF

SFP model

GLC-LH-SM

Keith

[keith.mckay]

Hi all

Hopefully this will be useful to someone else but the issue i was having was based around each negotiating a different speed.  In the Gig interface on the 3750 i executed the "speed nonegotiate" command.  This solved the issue.