I am quite a bit rusty from my days of networking. I am trying to setup my lab so I purchased 3 cisco 2501 to study for my CCNA, my question is? I have 2 serial interfaces and 1 AUI for ethernet on each router. How can I configure the Ethernet interface, if I don't see it on the configuration. From the CLI command I issue the command show ip int brief. But It only shows the 2 serials but no E0 interface. Any help will be greatly appreciated.

PS. I do have an Ethernet Transceiver connected to the AUI port on the router with a straight through cable going into a 2950 switch.

do you have link lights?

try a show run, do you see it there?

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"If you're good at anticipating the human mind. It leaves nothing to chance."
-Jigsaw

I do have a link light on the Transceiver as well as the Switch port that it is connected to. When I do a show run, it only displays the 2 serial interfaces. no Ethernet interface on the config.
I am at a loss.

Don't ask me why I actually have a 2501 lying around...

What does your "show version" say? Anything like this near the end?



And what version of IOS do you have on there?

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blog.brokennetwork.ca

Ironically mine only says 2 serial interfaces, take a look below. Also what IOS version are you running?
BTW, I am sending a screen copy as an attachment, since my laptop is the one connected to the console.

This one here I have is running c2500-ik8os-l.122-19a.bin

If it's not showing in sh ver then either the image you have doesn't support ethernet (not likely) or the physical ethernet ports are broken and not being detected.

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blog.brokennetwork.ca

informative!!!

Interesting as I mentioned at the beginning of the string, I purchased 3 routers, Router 1 actually shows an Ethernet port, Routers 2 and 3 do not??? At this point I am not sure if this is a hardware issue or a software issue. Any help trying to troubleshoot will be greatly appreciated.

Below is the Show Ver executed on Router 1 and Router 2

ROUTER 1
IOS (tm) 2500 Software (C2500-JS-L), Version 11.2(26e), RELEASE SOFTWARE (fc1)
Copyright (c) 1986-2003 by cisco Systems, Inc.
Compiled Fri 04-Jul-03 04:13 by cmong
Image text-base: 0x0304045C, data-base: 0x00001000

ROM: System Bootstrap, Version 11.0(10c), SOFTWARE
BOOTFLASH: 3000 Bootstrap Software (IGS-BOOT-R), Version 11.0(10c), RELEASE SOFTWARE (fc1)

Router1 uptime is 20 hours, 50 minutes
System restarted by power-on
System image file is "flash:c2500-js-l.112-26e.bin", booted via flash

cisco 2500 (68030) processor (revision N) with 6144K/2048K bytes of memory.
Processor board ID 06164485, with hardware revision 00000000
Bridging software.
SuperLAT software copyright 1990 by Meridian Technology Corp).
X.25 software, Version 2.0, NET2, BFE and GOSIP compliant.
TN3270 Emulation software.
1 Ethernet/IEEE 802.3 interface(s)
2 Serial network interface(s)
32K bytes of non-volatile configuration memory.
8192K bytes of processor board System flash (Read ONLY)

ROUTER2

Cisco Internetwork Operating System Software
IOS (tm) 2500 Software (C2500-F-L), Version 11.2(15a), RELEASE SOFTWARE (fc1)
Copyright (c) 1986-1998 by cisco Systems, Inc.
Compiled Mon 24-Aug-98 00:58 by tmullins
Image text-base: 0x0301F6AC, data-base: 0x00001000

ROM: System Bootstrap, Version 11.0(10c), SOFTWARE
BOOTFLASH: 3000 Bootstrap Software (IGS-BOOT-R), Version 11.0(10c), RELEASE SOFTWARE (fc1)

Router2 uptime is 21 hours, 15 minutes
System restarted by power-on
System image file is "flash:c2500-f-l.112-15a", booted via flash

cisco 2500 (68030) processor (revision N) with 2048K/2048K bytes of memory.
Processor board ID 09779076, with hardware revision 00000000
Bridging software.
2 Serial network interface(s)
32K bytes of non-volatile configuration memory.
8192K bytes of processor board System flash (Read ONLY)

Configuration register is 0x2102