Question for the braintrust. I am reading thru Lammle's book (for about the 6th time) and a thought just struck me--If you have nodes on either side of a router configured with different encap's, does that mean that every packet that comes into the router goes out in EVERY encap configured on the outbound interface? If I'm off base on this let me know. Seems incredibly inefficient (thus the recommendation to use 1 frame type, huh). Thanks people.

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I'm not sure I got what you are asking...........................let me try. the router of course knows the outbound interface and what type of encapsulation that node is using. When you configure a protocol ie rip, the network command tells the router for which network this protocol applies to. for instance.....I have two networks.....ospf on the right and rip on the left. When a packet destined for the network on the right reaches the router...the router will redistribute the packet in the apprpiate protocol......the same will happen to a packet destined for the left. I think that's what you atre asking.............

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It looks like I put this posting in the wrong forum. Thanks for the input anyway, devecchio. CCNP is a ways away for me at this point. I will have to "file" this response away for future reference. DOH!

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First of all, you can configure only one encapsulation type in each interface. For example, the serial interface with PPP encapsulation cannot be configured to encapsulate frame-relay at the same time.

In case both peer router encapsulation is different, the interface will down and that interface cannot be the outgoing interface for sure.

Hope this help,

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