03-02-2006 08:54 AM - edited 03-03-2019 11:55 AM
I'd like to use a 1721 router as a 'one-armed' firewall, i.e. routing and firewalling between vlan's on the FE interface of the router. Do the subinterfaces behave any different than physical interfaces for this purpose?
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03-02-2006 10:34 AM
Hi,
There is no problem with what you are suggesting. You can use the 1721 for inter-vlan routing. You can then applies access-lists on the ethernet sub-interfaces to filter traffic between the VLANs.
In terms of routing capabilities, you can do anything on ethernet sub-interfaces that you can do on physical ethernet interfaces.
Hope that helps - pls rate the post if it does.
Paresh
03-02-2006 10:34 AM
Hi,
There is no problem with what you are suggesting. You can use the 1721 for inter-vlan routing. You can then applies access-lists on the ethernet sub-interfaces to filter traffic between the VLANs.
In terms of routing capabilities, you can do anything on ethernet sub-interfaces that you can do on physical ethernet interfaces.
Hope that helps - pls rate the post if it does.
Paresh
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