Regarding Cisco 2811 and NM 2FE-2W

[mukundh86]

Hi

I had a question regarding the Cisco 2811. I tried fitting an NM 2FE-2W card and the fastethernet interfaces of the module never get recognised. Is there a special command to enable it or isn't the module supported at all by the router. If not , is there a way to have the router possess more than the 2 Fastethernet interfaces it already has? Let me know if any more info is needed from my end.

Another question I have out of curiousity. Is it possible to make the controller T1 port of a VWIC 1MFT-T1 or a VWIC 2MFT-T1 act as a fastethernet. Sounds a bit silly but just wanted to know

Thanks

Mukundh

[Roman Rodichev]

You need one of these:

- HWIC-1FE or HWIC-2FE. These are true routed ports supporting the same features as the onboard ethernet ports.

- HWIC-4ESW or HWIC-D-9ESW (double width). These are switched ports. You can create Layer 3 VLAN SVI interfaces and use them as normal routed ports, but some features won't be supported. The most important is you can't do shaping on them.

No, you can't make T1 port into Ethernet Good try though!

[mukundh86]

Thanks for letting me know Roman

But just to know for sure, is there no way an NM 2FE 2W will work on a cisco 2811 ? the problem I have to ship a 2811 router with 4 Fastethernet ports today

[Roman Rodichev]

nope, sorry you can see the list of supported modules here: http://www.cisco.com/en/US/products/ps5854/products_relevant_interfaces_and_modules.html

by the way, can you use ethernet subinterfaces and vlans on a switch?

[mukundh86]

Hi Roman

I just finished ordering some HWIC 2FE modules.

I am not sure what you were asking regarding VLANs and subinterfaces.I have created ethernet subinterfaces for lower 2600 routers but I believe for a switch you should be to create VLANS and subinterfaces.

[Roman Rodichev]

Yes, that's what I meant. If you have switches, you could create vlans and trunk them to a single interface on 2811 and configure subinterfaces. There are obviously downsides to that approach.

[mukundh86]

Yes, what you say is true, but customer requirement is to have a single device with 4 ports..sounds a bit odd, I got this request today morning and am forced to ship out by night or early tomorrow morning. I could only give suggestions but it is ultimately what the big wigs decide

[Roman Rodichev]

Understood, although I've never seen "big wigs" who know what a subinterface is

[mukundh86]

Ha Ha thats right,, the way everything works here is really wierd. they blindly go by what the customer wants

[mukundh86]

Another question I have is how I can use HWIC-4ESW on the cisco 2811. Lets say I have installed them, and I see the fastethernet ports in the sh version and sh ip interface brief outputs. Do I just configure them as in any other router as follows-

interface fa0/1

ip address 1.1.1.1 255.255.255.0

speed auto

duplex auto

no shut

Or is thereany special way of configuring it?

Thanks

Mukundh

[Roman Rodichev]

No, you configure them as switchports with VLANs and Layer 3 SVIs. Examples:

http://www.cisco.com/en/US/docs/ios/12_3t/12_3t8/feature/guide/esw_cfg.html#wp1051418

that whole document is good to look through

[mukundh86]

Thanks Roman

If I am correct, this portion of the document fulfils my requirement

The following example shows how to configure inter-VLAN routing:

Router#vlan database

Router(vlan)#vlan 1

Router(vlan)#vlan 2

Router(vlan)#exit

Router#configure terminal

Router(config)#interface vlan 1

Router(config-if)#ip address 1.1.1.1 255.255.255.0

Router(config-if)#no shut

Router(config-if)#interface vlan 2

Roouter(config-if)#ip address 2.2.2.2 255.255.255.0

Router(config-if)#no shut

Router(config-if)#interface FastEthernet 0/1/0

Router(config-if)#switchport access vlan 1

Router(config-if)#interface Fast Ethernet 0/1/1

Router(config-if)#switchport access vlan 2

Router(config-if)#exit 

[Roman Rodichev]

That's correct, good luck

[mukundh86]

Thanks a lot Roman . Your help has been invaluable. Else I would have had to do a lot of searching for this.

Mukundh

[mukundh86]

Hi Roman

Another question I have. Are these two modules the same thing ?-

WIC-4ESW

HWIC-4ESW

I am not sure if the 'H' makes a difference. Why I am asking is that the price difference between the two is large and that is why I am not sure if both are the same thing.

Mukundh