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.
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)
Please rate if it help.
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.
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.
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.