Brixton PPP <-> Cisco IPCP won't come up, LCP does

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3 total messages Started by Nathan D. Lane Sat, 12 Dec 1992 04:23

#179

Author: Nathan D. Lane
Date: Sat, 12 Dec 1992 04:23

33 lines
1823 bytes

I am using Brixton PPP version 1.2 on a SparcStation 1+ clone with an
Aurora Technologies 4-port sync card.  I am trying to connect with
a Cisco router at the other end (don't know anything about it, except
that it uses an "un-numbered" interface or something like that).  This
link is for our main internet feed.  On the same Sparc, I have two other
links to similar equipment via 56K lines [to Sparcs, not to Cisco's]
and they work fine.  

Here is some of the output that I get:

BPOP0015 : (0) Display of object: LCP03
(0)    LCP State = Open


BPOP0015 : (0) Display of object: IPCP03
(0)    IPCP State = Supporting LCP CLosed
(0)    Desired State = Active Open
(0)    Supporting LCP = LCP03

The LCP sure looks open to me!  Are there any peculiarities with Brixton
or with Cisco?  Brixton, of course, says they follow the spec closely,
but I have heard otherwise.  Reason for post:  their tech support doesn't
seem to return my calls with any frequency and the tech support at PSI
says this is an unsupported method of connecting, but they will take
my money anyway (which they did).  I'd really rather not buy a Cisco,
since they cost more than the whole Sparc setup did.

Thanks for any help.

-Nathan Lane
Trico Title Company, Santa Barbara, CA
nlane@well.sf.ca.us [sure would like to get my line to work so I can get
my own domain]

Re: Brixton PPP <-> Cisco IPCP won't come up, LCP does

#200

Author: Vesa Kein{nen
Date: Fri, 18 Dec 1992 08:01

32 lines
1788 bytes

   I am using Brixton PPP version 1.2 on a SparcStation 1+ clone with an
   Aurora Technologies 4-port sync card.  I am trying to connect with
   a Cisco router at the other end (don't know anything about it, except

I once connected 3Com NetBuilder and Cisco together with PPP.
Fortunately I had protocol analyzer, so I could see what
happens on serial line.

Cisco doesn't support any negotiation of parameters. If other side
tries to negotiate ANY parameter, Cisco discards request.

NetBuilder didn't negotiate any parameters in LCP -> no problem.

NetBuilder wanted to "negotiate" IP addresses with IPCP. Cisco
discarded request. NetBuilder was smart enough to try again
without any IPCP parameters, and IPCP got up. (However, when 
NB didn't get Cisco's IP address via IPCP, I had to add static
route for it.)

I have done this with Cisco software 8.? and 9.0.

My guess for your case: Brixton tries to negotiate some IPCP
parameters, and Cisco doesn't like it. Unnumbered interface on
Cisco might also cause problems.


Vesa
--
Vesa Kein{nen                  Nasilinnankatu 24 D 25, Tampere, Finland
Relevantum Oy                  Phone +358 31 147200
(Mikrokonsultit Oy)	       Fax   +358 31 147402
--

Re: Brixton PPP <-> Cisco IPCP won't come up, LCP does

#201

Author: Bob Sutterfield
Date: Fri, 18 Dec 1992 15:11

24 lines
1751 bytes

In article <VJK.92Dec18100137@etana.funet.fi> vjk@etana.funet.fi (Vesa Kein{nen) writes:
   Cisco doesn't support any negotiation of parameters. If other side
   tries to negotiate ANY parameter, Cisco discards request.

In our testing, cisco routers don't discard requests, they (correctly)
reject the parameters they don't like.

   My guess for your case: Brixton tries to negotiate some IPCP
   parameters, and Cisco doesn't like it.

And apparently Brixton doesn't handle the rejection well.  If you can,
try configuring the Brixton end so it doesn't request so much.  But
since newer cisco software handles a larger variety of negotiated
options, perhaps the Brixton end isn't prepared to handle (or
correctly reject) all that the cisco requests.

Either way, you'd have to watch the negotiations progress to see what
made them unhappy with each other.

(Sounds like I'm giving advice to the lovelorn, doesn't it? :-)
--
Bob Sutterfield, Morning Star Technologies            +1 614 451 1883
1760 Zollinger Rd, Columbus Ohio USA, 43221           +1 800 558 7827
bob@MorningStar.Com                                   +1 614 459 5054 (FAX)

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