Your going to have to have CSUs between the routers
most likely w/crossover between the CSUs. 

Back-to-back with Nortels requires internal clocking
be set on both sides (this is w/v.35 cables). cisco's
work fine w/internal on 1 side. Friends of mine tried
several custom v.35 dte/dce crossovers with no luck. 

If you have internal CSUs in the routers (WIC-T1,
MCT1, 56k CSU, etc) then that shouldn't be a problem
since it's a CSU/DSU interface and you have standard
56 or T1 cable pinout to cross, depending on module
type. 

You will need to run PPP between them; I have a doc on
that if you need it. MPPP works. Nortel routers are
rock solid IMHO. Might not be as feature rich but they
rock for general routing stuff. 

Erick
CCNP, NNCSE

--- Daniel Cotts  wrote:
> There used to be a writeup on this on the web. The
> URL now gives a 404. The
> short story IIRC was that there is a MTU mismatch
> due to the way that Cisco
> and Bay count packet size. One had to be changed to
> match the other. Also
> had to use PPP.
> This may not be true for newer Nortel gear. I've
> never tried it.
> 
> > -----Original Message-----
> > From: Godswill Oletu [mailto:[EMAIL PROTECTED]]
> > Sent: Monday, November 25, 2002 10:11 AM
> > To: [EMAIL PROTECTED]
> > Subject: Connecting Bay Router with Cisco Router
> (Back-to-Back)
> > [7:58036]
> > 
> > 
> > Hi group,
> > 
> > Has anyone done this kind of connection before? Is
> it 
> > possible to connect a
> > Cisco router and Bay(Nortel) Router together, back
> to back?
> > 
> > Am thinking of doing this in my home Network. I
> have a couple 
> > of Bay Routers
> > (Nortel) and I thought it will be great!
> simulating a WAN 
> > connection between
> > them and my Cisco routers through the Serial
> interfaces and 
> > NOT THE ETHERNET
> > INTERFACE.
> > 
> > This I can do if both routers were Cisco by using
> a DTE/DCE 
> > cables. However,
> > in this scenario which kind of cables are mine
> looking to 
> > buy, so that this
> > Serial Interface-WAN connection would be done (OR
> HAS CISCO 
> > AND NORTEL NOT
> > THOUGHT OF CO-EXISTING IN THIS FORMAT YET?)
> > 
> > Your comment(s) however little would be
> appreciated.
> > 
> > Thanks in advance.
> > 
> > Godswill Oletu
> answer.


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