| Author |
Enabling Interfaces?
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| Quarantine 2004-05-09, 3:51 am |
| Hi all, I'm wondering if anyone can help me in figuring out what command will let me enable the interfaces plugged into a 2600 and 3600 series routers from 'down - down' to 'up - up'. I'd apreciate the help so thanks in advance! | |
| Sexy Lexy 2004-05-09, 5:15 am |
| Have you tried no shutdown for the interface?
Router01>enable
Router01#config terminal
Router01(config)#interface e0
Router01(config-if)#no shutdown
Don't forget the IP address for the interface either!
When you have finished, don't forget to save the configuration:
Router01#copy running-config startup-config
I don't think that the commands would be that different on the 3600 series.
Can anyone else add to this?
 | |
| forbesl 2004-05-09, 5:29 am |
| I don't believe the interface is shut down, otherwise it would show "adminstratively down - down". There could be a number of things causing this problem. Things to check:
Ensure you have the proper cables connected to your interface. If you are connecting to a switch or a hub, ensure your have a straight-through cable connected. If you are connecting to another router (on the ethernet interfaces) or directly to a computer, make sure you have a cross-over cable connected. If you are connecting to another router on a serial interface, one side needs to be DCE and the other side DTE with the appropriate cable(s). | |
| darthfeces 2004-05-09, 2:32 pm |
| he did say down/down | |
| forbesl 2004-05-09, 3:53 pm |
| quote:
Originally posted by darthfeces
he did say down/down
Yes, she did say down/down. But there is a difference between an interface showing "interface down, line protocol down" and "interface administratively down, line protocol down". That's why I assumed the interface was not shutdown. If it was shutdown, it would show "interface administratively down, line protocol down", and she didn't state that.
Quarantine,
If your interface is showing "interface administratively down, line protocol down", then Lexy is correct, you need to put in a "no shut" statement on that interface. If it's showing "interface down, line protocol down", then you might be having connectivity issues. | |
| Sexy Lexy 2004-05-09, 4:16 pm |
| Quarantine,
Can you give us anymore information? | |
| darthfeces 2004-05-09, 10:52 pm |
| look at it as
layer1/layer2
other then that everything is just speculation since more info is needed  | |
| Quarantine 2004-05-10, 4:21 am |
| Sorry for not makingit as clear as I should have, but I got it! The router did say "interface administratively down, line protocol down", so in the end it seemed to have just been a command isuue and not a conectivity matter. Thanks a bunch Lexy and Forbesl! | |
| Quarantine 2004-05-10, 6:11 am |
|  I'm sorry for my overreacting, but it seems that I had not gotten it. After seeing if all interfaces were"up - up" by using the "show ip interface brief" command I see that practically all of them are still down. OK wait, I think I'm being very ignorant by having not explained the situation at all. I'm sorry I should have said this before but what I am doing was setting up a used router with a lost password so I was going through the recovery procedures and came to the step where I enable my interfaces to the "up - up" state. I followed the directions to get the following:
C3620(of)1_Fe(config)#interfac
e ethernet0/0
C3620(of)1_Fe(config-if)#no shutdown
C3620(of)1_Fe(config-if)#
01:51:05: %LINK-3-UPDOWN: Interface Ethernet0/0, changed state to up
C3620(of)1_Fe(config-if)#interface serial0/0
C3620(of)1_Fe(config-if)#no shutdown
C3620(of)1_Fe(config-if)#^Z
C3620(of)1_Fe#
01:52:46: %SYS-5-CONFIG_I: Configured from console by console
C3620(of)1_Fe#show ip interface brief
Interface IP-Address OK? Method Status Prot
ocol
Ethernet0/0 150.215.17.9 YES manual up down
Serial0/0 unassigned YES manual down down
BRI0/0 unassigned YES unset administratively down down
BRI0/0:1 unassigned YES unset administratively down down
BRI0/0:2 unassigned YES unset administratively down down
Theres so much I don't know that I'm not even sure if I' asking the right qusetions but why does the etherport say "YES manual up" and the serialport say"YES manual down"
even after performing the same "no shutdown" command for each interface? Is it actually a cabling issue? I might sound really stupid with this but I'm trying to set this royter up without it being connected to a network so its just a stand-alone setup I geuss, since I'm only "turning on" its interfaces I thought. Does the router actually have to be connected to another or is there anything elase that is very wrong? I am grateful for the help so far and just need a little more (lots actually) help. Thanks. | |
| forbesl 2004-05-10, 8:17 am |
| I you don't have anything connected to your router, you'll never see an "up - up" indication on any of the interfaces unless you configure a "no keepalive" on the interface. Try putting in a "no keepalive" statement on your ethernet interface. You should see it come "up - up" then.
router#conf t
router(config)#int e0/0
router(config-if)#no keepalive
router(config-if)#^Z
router#wr mem | |
| darthfeces 2004-05-10, 1:53 pm |
| no keepalive
will force an ethernet interface up even if there is no physical connector .....
oh daa you already said that ....
please shoot me ....  | |
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