[c-nsp] HDLC or PPP for layer 2 encapsulation?

Dave Lim dave.daturax at gmail.com
Thu Mar 2 05:45:06 EST 2006


Bear with me guys. I am more of a PIX and switching guy and have not
really done such implementation before.

I am configuring 2 Cisco routers for a point to point connection.
Circuit will be provided by the telco. Am wondering about the layer2
encapsulation between the 2 Cisco 1841 router with WIC-1T module using
V.35 cables.

 I am wondering should I use HDLC or PPP for the layer 2
encapsulation. HDLC is the default encapsulation used by Cisco Routers
right? I understand that HDLC encapsulation doesnt support
asynchronous lines which goes to say that if both circuits are
operating on different timing, the line connection will be down.

 With PPP, it supports both synchronous and asynchronous connection.
So which means that if the timing are different, the line will still
be up. And PPP supports PAP and CHAP for authentication.

And on another note, how do I forward NetBIOS and WINS broadcast on
cisco routers as they have a domain which is on NT servers they have
to access across the point to point leased line.



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