Ethernet 0 Port does not work Cisco 2600 router

mikejahnke101 · Jul 15, 2016

Hello,

I just bought a cisco 2600 router on ebay, and there is a port that I have no idea what it is. It's labeled Ethernet 0 on the case. (NOT Ethernet 0/0. There is another port on the case labeled that.) I, for the life of me, cannot find what it is. I do the "Show interfaces" command and what shows up is Ethernet 0/0, serial 0/0, and serial 0/1. This interface does not show up anywhere. When I plug a cable into the Ethernet 0 port, then to my computer, it connects to a network, so the port does work. What is this port for? Because I want to be able to configure this port with an IP address but it doesn't show up on the router's interfaces.

So, what could this port be? Because it's confusing me.

jeff-j · Jul 21, 2016

The port should be e0/0 or fa0/0 the port is most likely shut by default, so make sure to issue the no shut command. If you can, can you please post the results from the show ip int brief command.

mikejahnke101 · Jul 21, 2016

jeff-j :

I'm unable to configure the interface because it doesn't show up when I run the "show interfaces command." It's like the router does not see it there.

nigelivey · Jul 25, 2016

Are you sure its not the console port??

mikejahnke101 · Jul 25, 2016

nigelivey :

No there is another port labeled console on the face plate. It has this for the following ports:

Ethernet 0 (the port that I have no idea what it does)
Ethernet 0/0
Serial 0/0
Serial 0/1
Aux
Console.

Plus if I was plugging into the console port with an ethernet cord, how would I have been able to console in and run the "show interfaces" command?

nigelivey · Jul 25, 2016

mikejahnke101 :

Ethernet 0 is normally just a standard 10baseT interface. What IOS are you running?

mikejahnke101 · Jul 25, 2016

nigelivey :

mikejahnke101 :

Ethernet 0 is normally just a standard 10baseT interface. What IOS are you running?

I'm unsure of what ISO I'm running. What would I do to see that on the router?

nigelivey · Jul 26, 2016

mikejahnke101 :

nigelivey :

I'm unsure of what ISO I'm running. What would I do to see that on the router?

show version

bill001g · Jul 26, 2016

It been so long I forget what 2600 series had. There are network modules that go in the large slot of the router. They look like large silver plates with a single ethernet port in the simplest case. These ports are externally marked ETH0. The actual name internally depends on what slot you plug them into in say a 3600 router.

My guess is that the internal name would be ETH 1/0 since most 2600 only have 1 slot and it is called "1" so all ports are prefixed by that number.

Why it would not show up in a simple show interface is hard to say. There were all kinds of strange restrictions on what NM cards you could put in what models of 2600. It may not be a supported card on the particular hardware you have.

nigelivey · Jul 26, 2016

bill001g :

No there is a separate single rj45 Jack labeled Ethernet 0. Normally surrounded in yellow decal.

bill001g · Jul 26, 2016

nigelivey :

So I got ambitious and went looked though my stack of old 2610/2611 in the garage..I have about 7. The built in ports all say ethernet 0/0 or ethernet 0/1 in yellow as you indicate. The only one I see that says ethernet 0 is on a nm-1e module. I only have one of those modules and it include the old style AUI connections next to the rj45 port.

Now there may be other 2600 routers floating around so maybe a he could post a photo of the router.

.....I still wonder why I have not taken all those old routers to the dump yet, didn't think anyone used them at all.

nigelivey · Jul 26, 2016

bill001g :

nigelivey :

So I got ambitious and went looked though my stack of old 2610/2611 in the garage..I have about 7. The built in ports all say ethernet 0/0 or ethernet 0/1 in yellow as you indicate. The only one I see that says ethernet 0 is on a nm-1e module. I only have one of those modules and it include the old style AUI connections next to the rj45 port.

Now there may be other 2600 routers floating around so maybe a he could post a photo of the router.

.....I still wonder why I have not taken all those old routers to the dump yet, didn't think anyone used them at all.

Stick them on Ebay someone will have them for a lab.

mikejahnke101 · Jul 26, 2016

bill001g :

nigelivey :

yeah do what bill001g was saying. Put them on ebay. I purchased this old router just for practicing purposing. I am a networking major and I want to set up my own practice lab at home so I don't have to rely on the school lab.

Believe me college kids looking to do the same thing I am will for sure jump on them if you put them on for a good deal.

mikejahnke101 · Jul 26, 2016

nigelivey :

mikejahnke101 :

show version

I have not run that command yet, but I will tonight when I get home. I think the person I bought it from on ebay just stuck this card in there, most likely swapping it out for one that was supported. I don't think this card is support but I will do the show version command later and I'll keep you posted.

bill001g · Jul 26, 2016

Most people use the router simulators rather than real routers for any form of certifications. You only really need actual routers when you are doing the CCIE and most people rent time on internet available racks since it costs too much to build your own lab anymore. 2600 series routers are 2 to 3 software level back and do not have the memory to load the new ios versions.

The ones I have were barely usable as a lab more than 15 years ago when I was getting my CCIE.

Unfortunately cisco has artificial limitations in many of the routers that prevent you from using them much for a home router anymore. It makes no sense that a smaller 2900 series router can not keep up with a 100m internet connection but a $100 netgear router can. I am sure it is so you have to buy a more expensive router to get the larger cpu just so they can make more profit.

mikejahnke101 · Jul 27, 2016

bill001g :

Really one of the main reason I am buying actual routers and not just using a router sim, is because it is a way to talk yourself up to an employer. Pretty much what happened to me was I met with an employer as did one of my colleagues. We are both in the same level of our IT program at our school, and have very similar GPAs. He ended up getting the internship over me simply because he had a home lab set up and he showed the employer a few pictures.

I honestly lost an internship because my colleague had a crappy set up in his basement. So I figured having my own rig to practice on could help my chances in the future.

Plus I want to work with the physical equipment and have networking capabilities that only this Cisco gear can provide. And you can find a lot of equipment online for very cheap.

bill001g · Jul 27, 2016

There are a small handful of things you only learn having your own equipment that you never learn in certifications. You learn all about actually installing cards in the equipment and recovery crashed routers from broken IOS loads. This is one of those things that no certification even thinks to test for and you use all the time. Even stuff like hooking up t1/e1 cards is not covered except in the real world.

I assumed you were chasing cisco certifications. Most networking jobs at larger companies require the certifications. There are so many people that lie about what they have done and what there qualifications are. Most the easier certifications from say comptia are not valued much. Training programs that do not result in cisco certs tend to also not be real valuable because there are so many degree mill type of schools.

Then again the rampant cheating by people who pay others to take cert tests for them has made it so you mistrust almost everyone during interviews.

It is just that the old equipment is such a pain, you still have to worry about straight and cross cables and having to deal with knowing how to configure ISL trunks for vlans rather than 802.1q that everyone including cisco now uses. You also need large numbers of routers to really test things running routing protocols like OSPF using multiple areas.

Ethernet 0 Port does not work Cisco 2600 router

Commendable

Honorable

Commendable

Splendid

Commendable

Splendid

Commendable

Splendid

Titan

Splendid

Titan

Splendid

Commendable

Commendable

Titan

Commendable

Titan

Share this page