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Trying to connect two 2960CX Series switches with SFP (GLC-BX10-U) modules using LC-LC UPC cable but not successful

ahmed.alghawas
Level 1
Level 1

Hi All,

 

I need help connecting two 2960CX Series switches with SFP (GLC-BX10-U) modules using LC-LC UPC cable but not successful.  The connectivity required is L2 as a trunk interface.

 

Appreciate your support,

 

Thanks,

Ahmed 

 

Here are some details:

 

Switch #1:

Current configuration : 152 bytes

!

interface GigabitEthernet0/12

 switchport mode trunk

 speed nonegotiate

 udld port aggressive

 spanning-tree port-priority 240

end

 

Switch #2

Current configuration : 152 bytes

!

interface GigabitEthernet0/12

 switchport mode trunk

 speed nonegotiate

 udld port aggressive

 spanning-tree port-priority 240

end

 

show int g0/12

GigabitEthernet0/12 is down, line protocol is down (notconnect) 

  Hardware is Gigabit Ethernet, address is 4cbc.48ad.a98c (bia 4cbc.48ad.a98c)

  MTU 1500 bytes, BW 100000 Kbit/sec, DLY 1000 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 force-up, media type is 1000BaseBX10-U SFP

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

  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: 0/75/0/0 (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

     0 packets output, 0 bytes, 0 underruns

     0 output errors, 0 collisions, 1 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

 

Interface              IP-Address      OK? Method Status                Protocol

Vlan1                  192.168.2.7     YES NVRAM  up                    up      

GigabitEthernet0/1     unassigned      YES unset  up                    up      

GigabitEthernet0/2     unassigned      YES unset  down                  down    

GigabitEthernet0/3     unassigned      YES unset  down                  down    

GigabitEthernet0/4     unassigned      YES unset  down                  down    

GigabitEthernet0/5     unassigned      YES unset  down                  down    

GigabitEthernet0/6     unassigned      YES unset  down                  down    

GigabitEthernet0/7     unassigned      YES unset  down                  down    

GigabitEthernet0/8     unassigned      YES unset  down                  down    

GigabitEthernet0/9     unassigned      YES unset  down                  down    

GigabitEthernet0/10    unassigned      YES unset  down                  down    

GigabitEthernet0/11    unassigned      YES unset  down                  down    

GigabitEthernet0/12    unassigned      YES unset  down                  down    

Port-channel1          unassigned      YES unset  down                  down    

 

show ver

Cisco IOS Software, C2960CX Software (C2960CX-UNIVERSALK9-M), Version 15.2(7)E2, RELEASE SOFTWARE (fc3)

Technical Support: http://www.cisco.com/techsupport

Copyright (c) 1986-2020 by Cisco Systems, Inc.

Compiled Sat 14-Mar-20 18:35 by prod_rel_team

 

ROM: Bootstrap program is C2960CX boot loader

BOOTLDR: C2960CX Boot Loader (C2960CX-HBOOT-M) Version 15.2(6r)E, RELEASE SOFTWARE (fc1)

 

Admin uptime is 55 minutes

System returned to ROM by power-on

System restarted at 11:11:48 UTC Mon Jun 1 2020

System image file is "flash:c2960cx-universalk9-mz.152-7.E2/c2960cx-universalk9-mz.152-7.E2.bin"

Last reload reason: Reload command

 

 

 

This product contains cryptographic features and is subject to United

States and local country laws governing import, export, transfer and

use. Delivery of Cisco cryptographic products does not imply

third-party authority to import, export, distribute or use encryption.

Importers, exporters, distributors and users are responsible for

compliance with U.S. and local country laws. By using this product you

agree to comply with applicable laws and regulations. If you are unable

to comply with U.S. and local laws, return this product immediately.

 

A summary of U.S. laws governing Cisco cryptographic products may be found at:

http://www.cisco.com/wwl/export/crypto/tool/stqrg.html

 

If you require further assistance please contact us by sending email to

export@cisco.com.

 

cisco WS-C2960CX-8PC-L (APM86XXX) processor (revision L0) with 524288K bytes of memory.

Processor board ID FOC2312Y3CH

Last reset from power-on

1 Virtual Ethernet interface

12 Gigabit Ethernet interfaces

The password-recovery mechanism is enabled.

 

512K bytes of flash-simulated non-volatile configuration memory.

Base ethernet MAC Address       : 4C:BC:48:AD:A9:80

Motherboard assembly number     : 73-100862-04

Power supply part number        : 341-0675-02

Motherboard serial number       : FOC23114XUX

Power supply serial number      : LIT23012XFY

Model revision number           : L0

Motherboard revision number     : C0

Model number                    : WS-C2960CX-8PC-L

System serial number            : FOC2312Y3CH

Top Assembly Part Number        : 68-100568-01

Top Assembly Revision Number    : E0

Version ID                      : V03

CLEI Code Number                : CMMT410BRB

Hardware Board Revision Number  : 0x09

 

 

Switch Ports Model                     SW Version            SW Image                 

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

*    1 12    WS-C2960CX-8PC-L          15.2(7)E2             C2960CX-UNIVERSALK9-M    

 

 

Configuration register is 0xF

 

Admin#

 

 

2 Accepted Solutions

Accepted Solutions

Giuseppe Larosa
Hall of Fame
Hall of Fame

Hello @ahmed.alghawas ,

you need a different type of SFP on one side.

look at the following

https://www.optcore.net/product/cisco-glc-bx-u-compatible-1000base-bx10-u-smf-tx1310nmrx1490nm-10km-sfp-transceiver/

 

This special type of SFP are made to work on a single fiber and onde side transmits at 1310 nm and receives at 1490 nm the other side must do the opposite.

 

the other side must be of type final D

 

https://www.optcore.net/product/cisco-glc-bx-d-compatible-1000base-bx10-d-smf-tx1490nmrx1310nm-10km-sfp-transceiver/

 

if you have two fibers avaiable you can use more conventional SFP, if you have only one you need two SFPs of different types.

 

Hope to help

Giuseppe

 

View solution in original post

Thank you!

 

Yes, I was using GLC-BX-U on both sides which is incorrect.

 

 

 

 

View solution in original post

4 Replies 4

Giuseppe Larosa
Hall of Fame
Hall of Fame

Hello @ahmed.alghawas ,

you need a different type of SFP on one side.

look at the following

https://www.optcore.net/product/cisco-glc-bx-u-compatible-1000base-bx10-u-smf-tx1310nmrx1490nm-10km-sfp-transceiver/

 

This special type of SFP are made to work on a single fiber and onde side transmits at 1310 nm and receives at 1490 nm the other side must do the opposite.

 

the other side must be of type final D

 

https://www.optcore.net/product/cisco-glc-bx-d-compatible-1000base-bx10-d-smf-tx1490nmrx1310nm-10km-sfp-transceiver/

 

if you have two fibers avaiable you can use more conventional SFP, if you have only one you need two SFPs of different types.

 

Hope to help

Giuseppe

 

Thank you!

 

Yes, I was using GLC-BX-U on both sides which is incorrect.

 

 

 

 

Reza Sharifi
Hall of Fame
Hall of Fame

Hi,

Looking at the Cisco transceiver matrix document, it appears that "GLC-BX10-U" is not supported but  "GLC-BX-U" is.

 

https://tmgmatrix.cisco.com/?si=2960CX

 

HTH

Thanks for your input bro.

 

GLC-BX10-U is same as GLC-BX-U (10km).

 

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