Can you use HWIC-4ESW to route to another network?

Unanswered Question
Aug 17th, 2007

We have 2801 router with two interfaces.

We want to add HWIC-4ESW to have at least 2 more routable interfaces. I understand that if you assign 1 interface to vlan 1 and and one of the other interfaces on the card to vlan 2, and assign Ip;s to the vlans you make a router out of the vlans. Does anyone know were any documentation is on web to make this work?

The built in interfaces are being used as routed ports to internet. The Vlan router will be a gateway to another network.

I have this problem too.
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Paolo Bevilacqua Fri, 08/17/2007 - 11:27

Yes. There should be also another way, that is "no switchport" and assign IP directly under interface.

If you have not purchased the module yet, you can also look at installing 2 x HWIC-1FE instead. With these, all the QoS, routing etc, features are guaranteed to work like on the built-in ports.

Hope this helps, please rate post if it does!

royalblues Fri, 08/17/2007 - 13:26

Paolo, I doubt that these modules support routed port configurations.

Having said that, unless there is a requirement to connect 4 devices i would prefer the HWIC-1FE or HWIC-2FE


royalblues Fri, 08/17/2007 - 13:47


Even i have never used these HWICS and hence not sure. Perhaps somebody who has tried it can confirm :-)


mohammedmahmoud Fri, 08/17/2007 - 13:48

Hi Paolo and Narayan,

Unfortunately i tried using this HWIC in one of my labs but as per this document "No, the Cisco EtherSwitch HWICs do not support routed ports. This means you cannot assign an IP address directly to the interface and make it a Layer 3 interface".

[edit] for the original poster, each switch port can be assigned to its own VLAN, effectively providing four additional routed ports (SVI) and give the ip addresses under the VLAN interfaces, but take care of this "However, there are serious performance and feature limitations to doing this. The VLAN interfaces are truly Layer 3 switching interfaces and are treated uniquely among interface types on the router. Many features are not supported or tested on these interfaces, including Point-to-Point Protocol over Ethernet (PPPOE) termination, Layer 2 Tunneling Protocol Version 3 (L2TPv3) termination, MAC address assignment, Layer 3 QoS, and others. You should carefully test any desired feature and solution prior to deploying it."


Mohammed Mahmoud.

royalblues Fri, 08/17/2007 - 13:57


Thanks for testing it out and clarifying the doubts :-)

Hows prep going btw?


mohammedmahmoud Fri, 08/17/2007 - 14:02

Hi Narayan,

Its going great, but i hope to be able to return to a normal person again after getting the number :) Thanks very much for asking.


Mohammed Mahmoud.

nat.watkins Sat, 08/18/2007 - 03:36

Thanks All for the info. I am green to cisco router config.

I have installed card. Assigned ports 0 to vlan 1, assigned ports 2 thru 4 to vlan 2.

Assigned IP's i side for my LAN the other side for WAN.Setup static route.

But it still does not seem to route. Even tried ping from router. Am I missing a step?

The worst thing is that when I install card it seems to interupt-slow down service on my other routed ports.

Thanks Again

muhasif99 Sun, 08/19/2007 - 03:46


I have recently configured 2811 router with HWIC-4ESW card could successfully route between three networks.

show me your config and I can help

mohammedmahmoud Mon, 08/20/2007 - 11:38

Hi Nathaniel,

This should work, but make sure that you've added VLAN2 and 3 to the VLAN database, if you may please post a "show vlan-switch", you can add them as follows:

router#vlan database

router(vlan)#vlan 2

VLAN 2 added:

Name: VLAN0002

router(vlan)#vlan 3

VLAN 3 added:

Name: VLAN0003


APPLY completed.




Mohammed Mahmoud.

nat.watkins Mon, 08/20/2007 - 11:56


I will try tonight.


any books you would recomend for cisco beginners

mohammedmahmoud Mon, 08/20/2007 - 12:02


Please do enjoy your test :)

I'll recommend the Cisco CCNA Self-Study Exam Certification Guide by Wendell Odom, its a nice book that covers many things, and it'll be a nice step if you've decided to go for your CCNA.


Mohammed Mahmoud.

nat.watkins Tue, 08/21/2007 - 06:28


Vlans do not want to route. I Plug laptop into vlan3 configured with DG= (vlan3 interface ip) =, but I cannot ping remote router. I can ping from 2801 via vlan 2.


mohammedmahmoud Tue, 08/21/2007 - 09:50


Its either a typo or you have configured the wrong IP for VLAN3, from the configuration it is:


interface Vlan3

description SwGI-Switch

ip address



Please let me know, and if it there is still a problem then please paste a show ip interface brief.


Mohammed Mahmoud.

nat.watkins Wed, 08/22/2007 - 06:59

Sorry, vlan3 was supposed to be

I changed that -saved running config , but it still does not route. I have a PC pluged into vlan3 set with ip of DG=, but I cannot ping to or 17.




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