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

[Larry Smith]

On Thursday 02 March 2006 12:01, Joseph Jackson wrote:
> > -----Original Message-----
> > From: cisco-nsp-bounces at puck.nether.net
> > [mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Dave Lim
> > Sent: Thursday, March 02, 2006 2:45 AM
> > To: cisco-nsp at puck.nether.net
> > Subject: [c-nsp] HDLC or PPP for layer 2 encapsulation?
> >
> > 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.
>
> You are correct HDLC is the default.  We use PPP because it is an open
> standard and if
> For any reason we have to replace a router with a non-cisco at one end
> we don't have to configure the other router.
> As for the NetBIOS stuff as long as you have IP connectivity between the
> too sites you won't have any issues
> With the communication of them.
>

Hmmm, I was under the impression that pretty much all Netbios communication 
was done as broadcast packets (ports 137, 138, 139, and now 450 to the .255 
network address) and that broadcast packets are not transferred across 
routers.   A wins server takes care of all this, but natively I do not 
believe that you will "see" the other network in standard Windows Network 
without a wins server or something running running that does this function???

-- 
Larry Smith
SysAd ECSIS.NET
sysad at ecsis.net