07-26-2012 02:02 AM - edited 03-07-2019 07:59 AM
Hi Guys,
I have two devices connected to each other using a crossover cable.
The first device output is as below
cisco WS-C3750G-12S (PowerPC405) processor (revision H0) with 118776K/12288K bytes of memory.
Processor board ID CAT0837Y165
Last reset from power-on
2 Virtual Ethernet/IEEE 802.3 interface(s)
12 Gigabit Ethernet/IEEE 802.3 interface(s)
The password-recovery mechanism is enabled.
512K bytes of flash-simulated non-volatile configuration memory.
Base ethernet MAC Address : 00:12:01:8B:43:00
Motherboard assembly number : 73-8307-08
Power supply part number : 341-0048-01
Motherboard serial number : CAT083707WC
Power supply serial number : LIT083204Q2
Model revision number : H0
Motherboard revision number : A0
Model number : WS-C3750G-12S-S
System serial number : CAT0837Y165
Top Assembly Part Number : 800-21966-01
Top Assembly Revision Number : L0
Version ID : N/A
Hardware Board Revision Number : 0x07
THE SECOND DEVICE IS AS BELOW
Cisco Internetwork Operating System Software
IOS (tm) C2950 Software (C2950-I6Q4L2-M), Version 12.1(20)EA1a, RELEASE SOFTWARE (fc1)
Copyright (c) 1986-2004 by cisco Systems, Inc.
Compiled Mon 19-Apr-04 20:58 by yenanh
Image text-base: 0x80010000, data-base: 0x805A8000
ROM: Bootstrap program is C2950 boot loader
NALLIS_SW uptime is 5 hours, 48 minutes
System returned to ROM by power-on
System image file is "flash:/c2950-i6q4l2-mz.121-20.EA1a.bin"
cisco WS-C2950G-24-EI (RC32300) processor (revision K0) with 20713K bytes of memory.
Processor board ID FOC0835X48S
Last reset from system-reset
Running Enhanced Image
24 FastEthernet/IEEE 802.3 interface(s)
2 Gigabit Ethernet/IEEE 802.3 interface(s)
32K bytes of flash-simulated non-volatile configuration memory.
Base ethernet MAC Address: 00:12:00:DD:5A:00
Motherboard assembly number: 73-7280-05
Power supply part number: 34-0965-01
Motherboard serial number: FOC083526UH
Power supply serial number: DAB0834F2W5
Model revision number: K0
Motherboard revision number: A0
Model number: WS-C2950G-24-EI
System serial number: FOC0835X48S
I HAVE CONNECTED BOTH SWITCHES TOGETHER VIA GLC-T MODULE ON THE 3750 AND 2950-24smi ON A FASTETHERNET INTERFACE USING A CAT 5 CABLE.
KINDLY ADVISE.
07-26-2012 02:25 AM
1. Can you please paste the config both ports(1 port on 3750 and other on 2950....where they conbeed on these ports) ?
2. Sh int _ (for Both interface)
Reagrds
Please rate if it help.
07-26-2012 10:03 AM
Hi Rustom,
Please perform the below checks to identify the root cause.
1) From 3750 try connecting a desktop/laptop directly and see the links coming up.
2) Please verify the T - connector which is used is a compatible one.
3) Please check with different speed settings i.e. auto - auto / speed 100 - duplex full.
4) try with the different cable. i.e. another cross cable & straight cable.
These tests will solve your issues or you will come to know the root cause.
Please do rate for the helpful posts.
By
Karthik
07-26-2012 12:05 PM
What is the status of the interfaces on the devices?
Do a show interface
You can also do a show ip interface brief.
It is possible that the interfaces are admin down, which is typically the default.
07-26-2012 02:57 PM
ON A FASTETHERNET INTERFACE USING A CAT 5 CABLE.
What kind of cable?
If you are using GLC-T, this means MDI/MDI-X is disabled, therefore you need a CROSSOVER cable.
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