08-03-2010 03:03 AM - edited 03-06-2019 12:17 PM
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
08-03-2010 06:21 AM
Hello,
Can you post the output of "show interface " from both
switches with the SFP in the slot?
Regards,
NT
08-03-2010 06:41 AM
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
08-03-2010 05:40 PM
And this is the same on all 4 SFP ports of the 3750?
08-03-2010 07:28 PM
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
08-04-2010 12:32 AM
Hi
There is no intermediate patching all connections are direct, same SFP is being used and has been tested in all ports.
Keith
08-04-2010 03:29 PM
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
08-05-2010 03:00 AM
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
11-21-2010 02:18 AM
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.
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