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New Member

Can we have the LAN interface on the cisco2811 router to be Layer2 interface

Hi,

I am using a cisco 2811 router.I am running short of Layer3 interface.

Can i use L2 interface on the router for connecting my LAN segment.

To explain in detail.

I have totally 4 L3interface on the router.

2 interfaces will be used for WAN connection

1 intercae will be used for internet connection

1 interface for HSRP

Now can i use the L2 interface for connecting my LAN segment and still have connectivity to 2WAN,Internet,HSRP

Please help

Regards

Arlkumar

1 ACCEPTED SOLUTION

Accepted Solutions
New Member

Re: Can we have the LAN interface on the cisco2811 router to be

Yes you can do it. Consider HWIC-4ESW as a mini layer 3 switch with 4 ports. Now when you will add this card in ur 2811, you will see 4 L2 fastethernet ports. These ports are layer 2. So you need to create Interface Vlan 1 (SVI) and assign it your lan IP (which will serve as a gateway to your lan machines). Like this

Interface vlan 1

ip address 10.0.0.1 255.255.255.0

no shut

Now all the L2 ports of HWIC are part of vlan 1 and therefore part of this SVI.

Rate if helps

6 REPLIES
Purple

Re: Can we have the LAN interface on the cisco2811 router to be

  Please clarify what you mean by a L2 interface .  Do you have like a 4 port hwic module installed ?  If so then yes you can run your lan on that as you can route thru that card by using configured SVI's .

New Member

Re: Can we have the LAN interface on the cisco2811 router to be

Hi,

Can I assign ip address if I am using hwic-4esw.

Regards

Arulkumar

Purple

Re: Can we have the LAN interface on the cisco2811 router to be

  Yes you would create a layer 3 SVI  and a Layer 2  definition in the vlan database and then put the port on the card into that vlan ...

New Member

Re: Can we have the LAN interface on the cisco2811 router to be

Yes you can do it. Consider HWIC-4ESW as a mini layer 3 switch with 4 ports. Now when you will add this card in ur 2811, you will see 4 L2 fastethernet ports. These ports are layer 2. So you need to create Interface Vlan 1 (SVI) and assign it your lan IP (which will serve as a gateway to your lan machines). Like this

Interface vlan 1

ip address 10.0.0.1 255.255.255.0

no shut

Now all the L2 ports of HWIC are part of vlan 1 and therefore part of this SVI.

Rate if helps

New Member

Re: Can we have the LAN interface on the cisco2811 router to be

Thank you

New Member

Re: Can we have the LAN interface on the cisco2811 router to be

Hi Arlkumar,

You can convert the swtich ports in an etherswitch module to Layer 3.

You can achieve this by the following commands-:

router(config)#int f0/1

router(config-int)#no switchport

router(config-int)#ip address ........

Hope this helps

Chris

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