make sure you have the right cable connecting them. pins 1,2 to 7,8 and 7,8
to 1,2. that is a 56/64k xover cable...
-b
""Ken W. Alger"" <[EMAIL PROTECTED]> wrote in message
8irtou$9ta$[EMAIL PROTECTED]">news:8irtou$9ta$[EMAIL PROTECTED]...
> I cannot get my two routers to talk over a CSU/DSU connection and cannot
> figure out what I am missing. I get the notice "Serial 0 is up, line
> protocol is down" on both routers. I am just starting out so I would
> appreciate any advice on items to check in troubleshooting this setup.
>
> One router connects to a CSU/DSU running at 64K connected to another
CSU/DSU
> running at 64K. I can do the loopback tests on the CSU/DSUs so I am
fairly
> confident that they can communicate, but I could be wrong. I have one
unit
> set with internal timing. Any advice on what problems to look for with
this
> connection?
>
> IGS Router (IOS 9.1(8))
> serial0 => TCP/IP 197.168.250.1 /24
>
> 2505 Router (IOS 10.4)
> serial0 => TCP/IP 197.168.250.254 /24
>
> I have changed the encapsulation from HDLC to x25 and to PPP to no avail.
> My reasoning for these attempts was that in Lammle's book he mentions
> CSU/DSUs in the x25 area and I tried PPP because the IS manager at my
> company said that he thought that would do it. When using x25 I used both
> the default settings for window and packet size as well as custom ones.
> Neither produced a working solution.
>
> Using PPP encap I do get various results with the "lcp state" information
on
> the 2505. It varies from REQSENT to ACKSENT to LISTEN, and to the best of
> my knowledge these changes do not happen as a result of any other network
> configuration change, i.e. I do a "show int s0" once and it will come up
> with "lcp state = REQSENT" and a few minutes latter it will come up with
> "lcp state = LISTEN".
>
> I know I am new to this level of networking, but I am at a complete loss
as
> to what to look for or change. Any help would be VERY much appreciate.
> Please reply to [EMAIL PROTECTED] as well as to this group.
>
> Thanks,
> Ken W. Alger
>
>
>
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