The CBAC and CEF for VoIP

Hallo

I have a cisco router from 1721 to LAN-to-LAN and Internet access.

The WAN link is EN PVC two one for LAN-to-LAN and Internet.

On the LAN-to-LAN PVC we must apply the VoIP so I would use LLQ, other features QoS and CEF (Cisco Express Forwarding).

On Internet in PVC, we would have IOS Firewall with CBAC.

Can I use the CBAC and CEF at the same time?

Not only should you use CEF, but you must. Such LLQ implemented only with CBWFQ requires that the router has enalbed CEF. CEF will not affect the functionality of the CBAC. CEF is simply analogous to fast switching switching method, except that it has the information previously stored in a table for quick access. It is the most effective method of switching your router can use.

Tags: Cisco Security

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