How do you turn on subinterfaces on Cisco 2600 series router

mysql1988

I tried

no shutdown on interface f0/0.1 and it says command incomplete.

but when I type no shutdown ?

<cr> this comes up.

does anyone knows what it is?

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Comments

erikd65

<cr> means carriage return. Basically, your only option is to press enter and that will shut down the subinterface. I suppose you could also delete the subinterface if you no longer need it.

mysql1988

erikd65 wrote:

<cr> means carriage return. Basically, your only option is to press enter and that will shut down the subinterface. I suppose you could also delete the subinterface if you no longer need it.

how do you turn on subinterface on a cisco router?

mikej412

What have you done other than the
interface fa0/0.1 and no shut?

Did you set the encapsulation -- either dot1q or isl, depending on your switch (and include the VLAN) on the subinterface?

Did you take the IP address off of the physical interface with the no ip address command?

Did you set your IP address and subnet mask on the subinterface?
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erikd65

Oops, my bad. I didn't read it correctly.

mgeorge

mysql1988 wrote:

I tried

no shutdown on interface f0/0.1 and it says command incomplete.

but when I type no shutdown ?

<cr> this comes up.

does anyone knows what it is?

What exactly are you trying to do? if you want the interface to be up, then you have to be in interface configuration,
Router(confg-if)#No shut

If you want to create a interface f0/0.1 then you simply type Router(config)#int f0/0.1
then it will create the interface for you automatically

If you want to remove it, then type in Router(config)#no int f0/0.1

Before you can assign an ip addy to a lan sub-int, you have to have encap set first, and no ip addy on the physical interface. As well as you need an IP Plus IOS, which could be c2600-is-mz.12.0-1.T.bin or HIGHER. The IS in a c2600-is-mz stands for IP plus. Most ip plus ios's will support IEEE 802.1Q Vlan Trunking, any feature set higher then IP Plus, such as Enterprise basic, or w/e will definately support all IP Plus features and more.

For more information on Feature sets by platform/build and/or revisions visit;

http://tools.cisco.com/ITDIT/CFN/jsp/index.jsp

mysql1988, are you using a NetSim by any chance