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New Member

1712 router

I am about to configure nat on a 1712 router. The fast ethernet 0 will be the outside interface connected to the internet. Which one of the 4-port switch will be the inside? How is the 4-port switch is connected? I mean where do I put the ip address since the 4 port switch is a layer 2 device? Please help me.

thanx

6 REPLIES
VIP Purple

Re: 1712 router

Hello,

I think the easiest way to configure your 1712 with NAT is though the SDM (Security Device Manager) tool.

Not sure if you are familiar with this tool, here are some links (for which you need a CCO login):

Downloading and Installing Cisco Security Device Manager (SDM)

http://www.cisco.com/en/US/partner/products/sw/secursw/ps5318/prod_installation_guide09186a00801cc733.html#23144

Using SDM (to configure NAT):

http://www.cisco.com/en/US/partner/products/hw/routers/ps221/products_quick_start09186a00801a110e.html#42582

Regards,

Georg

New Member

Re: 1712 router

Thank you for the information, but how do I get the CCO login ? As a CCNP can I have access to this?

thanks

VIP Purple

Re: 1712 router

Hello,

you can go to this site to register and create a CCO login (I am not sure though what access you will get):

http://tools.cisco.com/RPF/register/register.do

Regards,

Georg

New Member

Re: 1712 router

Hi,

As it is 4 port Switch module, you can not assign ip to any of the ports.

How ever, you can configure VLANs (Upto 16), like if you are doing in L3 switch.

So any VLAN interface can be used to participate in NAT

Pls refer to

http://www.cisco.com/univercd/cc/td/doc/product/access/acs_mod/1700/1700cnts/1711swm.htm

New Member

Re: 1712 router

ok, thaks. But if I create 2 vlans, vlan1 and vlan2, then what about creating a trunk between the switch and the ethernet port of the router? Do I have to create subinterfaces with dot1q encapsulation or is not needed. How would the 2 vlans communicated without an external router?

thanks in advace

New Member

Re: 1712 router

As both VLAN present in the same L3 box (here router), one VLAN traffic will be routed to other VLAN (Router routing function will take care of inter VLAN routing), You do not require external router.

Here trunking is not requied and can not be used between VLAN in the same device.

You require trunking only when multiple VLAN info need to pass accross the boxes (Switch/router).

Switch1----Trunk-----Switch2

Router1----Trunk-----Router2

Switch----Trunk-----Router

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