From: Tim Fletcher (groupstudy@fletchmail.net)
Date: Sun Dec 14 2003 - 21:39:31 GMT-3
Yes there is. It may work if it's only configured under one or the other, the trick is knowing which to use when. Try adding a 2nd dialer interface, and linking it to the physical interface and see what happens.
The difference is when the dialer interface binds to the physical interface. For inbound calls, if you only have 1 dialer interface linked to a physical interface, the dialer interface gets bound to the physical interface immediately after receiving the call. Since it is bound before ppp negotiation starts, you would only need the ppp parameters under the dialer interface.
If you have multiple dialer interfaces linked to the physical interface, it cannot bind to a dialer interface until it knows which one to bind to. Since the remote authentication name is used to determine which dialer to bind to, it will have to negotiate ppp from the physical interface. Only after authentication is complete, does it bind to the physical interface. In this case, you only need the ppp parameters on the physical interface.
For outbound calls, the dialer initiates the call, so it is bound to the physical interface immediately. Once again, it uses the ppp parameters configured on the physical interface.
It's pretty easy to confirm and test all this. Just do a "debug ppp negotiation". You will see each step of the negotiation, and at the beginning of each line, which interface is doing it.
-Tim
At 06:58 PM 12/14/03, Peng Zheng wrote:
>Some DoC receommend encapsulation ppp and ppp
>multilink should be configured under both dialer
>interface and bri physical interface.
>
>But I tried to only under dialer interface, it works
>fine.
>
>Is there any scenario it doesn't work?
>
>
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