12-27-2007 07:52 AM - edited 03-03-2019 08:03 PM
Hello,
A customer recently purchased the PA-MC-8TE1+ module for their 7500 Router at their head office. They would like for the T1 module to connect to their remote offices that have Paradyne CSU/DSU's which connect to a 2801 Cisco Router via V.35 cable to a serial port. Before testing this via the actual T1 link, we decided to test the equipment first via a T1 crossover cable (back-to-back) just to make sure that everything is working correctly.
I configured both the Cisco T1 module and the Paradyne CSU & DSU to use B8ZS linecoding and ESF framing. And since this is a back to back connection, I configured the Cisco router to run the internal clocking. I then configured the IP Address's on both routers within the same subnet and used Encapsulation PPP, yet despite my best efforts, I only get Line Up and Protocol Down.
When checking the Paradyne equipment, they indicate that the connection is established without any problems.
The actual Part Numbers for the Paradyne CSU/DSU are 7974 TDM SDSL and 7975 TDM SDSL.
I know this is a stupid question, but does Cisco integrate with non-Cisco CSU/DSU's? I would appreciate any help and working configuration samples with similar non-cisco products.
Thanks
12-27-2007 10:55 AM
Yes it does integrate, also because cisco does't make external csu/dsu.
Collect show interface and show controller on both routers, send it here together with configuration.
01-01-2008 07:53 AM
Dear all,
Here is the Show interface and show run for the branch router
Serial0/0/0 is up, line protocol is down
Hardware is GT96K Serial
Description: connection to Basateen Computer room
Internet address is 10.0.30.34/30
MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec,
reliability 250/255, txload 1/255, rxload 1/255
Encapsulation PPP, LCP Listen, loopback not set
Keepalive set (10 sec)
Last input never, output 00:00:24, output hang never
Last clearing of "show interface" counters 00:00:42
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: fifo
Output queue: 0/40 (size/max)
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
0 packets input, 0 bytes, 0 no buffer
Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
21 input errors, 21 CRC, 11 frame, 9 overrun, 0 ignored, 15 abort
10 packets output, 140 bytes, 0 underruns
0 output errors, 0 collisions, 4 interface resets
0 output buffer failures, 0 output buffers swapped out
0 carrier transitions
DCD=up DSR=up DTR=up RTS=up CTS=up
Show Run:
interface Serial0/0/0
description T1 connection to Head Office
ip address 10.0.30.34 255.255.255.252
encapsulation ppp
no ip mroute-cache
no fair-queue
!
router rip
version 2
redistribute connected
network 10.0.0.0
!
Here is the Show interface, show controller and show run for the main 7500 Router
Show Controller:
show controllers t1 5/0/3 brief
T1 5/0/3 is up.
Applique type is Channelized T1
Cablelength is short 110
No alarms detected.
alarm-trigger is not set
Framing is ESF, Line Code is B8ZS, Clock Source is Internal.
Data in current interval (722 seconds elapsed):
0 Line Code Violations, 0 Path Code Violations
0 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins
0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 0 Unavail Secs
Total Data (last 24 hours)
0 Line Code Violations, 0 Path Code Violations,
0 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins,
0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 0 Unavail Secs
Show Interface:
show int serial 5/0/3:1
Serial5/0/3:1 is up, line protocol is down
Hardware is Multichannel T1/E1 without TDM
Internet address is 10.222.30.3/24
MTU 1500 bytes, BW 1536 Kbit, DLY 20000 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation PPP, LCP Listen, crc 16, loopback not set
Last input 1d04h, output 00:00:31, output hang never
Last clearing of "show interface" counters 4d01h
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: weighted fair
Output queue: 0/1000/64/0 (size/max total/threshold/drops)
Conversations 0/1/256 (active/max active/max total)
Reserved Conversations 0/0 (allocated/max allocated)
Available Bandwidth 1152 kilobits/sec
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
106 packets input, 680 bytes, 0 no buffer
Received 0 broadcasts, 0 runts, 1 giants, 0 throttles
1 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 115024810 abort
69820 packets output, 977480 bytes, 0 underruns
0 output errors, 0 collisions, 6988 interface resets
0 output buffer failures, 0 output buffers swapped out
9 carrier transitions no alarm present
Timeslot(s) Used:1-24, subrate: 64Kb/s, transmit delay is 0 flags
Transmit queue length 27
Show run:
controller T1 5/0/3
framing esf
clock source internal
linecode b8zs
cablelength short 110
channel-group 1 timeslots 1-24
interface Serial5/0/3:1
ip address 10.222.30.3 255.255.255.0
encapsulation ppp
keepalive 10 0
!
router rip
version 2
network 10.0.0.0
01-01-2008 08:17 AM
Mohamed
I notice that the LCP on both ends is in the Listening state and I wonder if they are hearing anything. Is it possible that the T1 crossover cable is not correct? Can you use it to connect other routers T1 interfaces and it works? Or can you use it to connect 2 T1 interfaces on the 7500 and it works?
I also note a serious mismatch in addressing:
the branch router has
ip address 10.0.30.34 255.255.255.252
while the 7500 has
ip address 10.222.30.3 255.255.255.0
It makes me wonder whether we are looking at the right interfaces, or whether you are disguising things - and if so are you disguising more than the addresses which might help hide the real problem.
To go back to your original post and the question that it asks:
does Cisco integrate with non-Cisco CSU/DSU's
it is certainly true that Cisco integrates with non-Cisco CSU/DSU equipment.
HTH
Rick
01-01-2008 10:15 AM
Hello Rick,
Good catch, i just realized that i posted the old configuration with the wrong ip address... without making this post more complicated, rest assured that both routers are on the same subnet, the branch router ip address is in fact 10.222.30.1/24, and the show controller and show interface commands were taken while these ip addresses were in the same subnet. With regards to the T1 crossover cable, it's been used before and works fine. any ideas as to what else could cause this?
Thanks
01-01-2008 08:51 PM
hi
I suppose u have not included "Framing is ESF, Line Code is B8ZS, Clock Source is Internal. " in branch router for the controller
plz include it
regards
01-02-2008 01:55 AM
The branch router is connected to a Paradyne CSU/DSU, those are configured for framing ESF and line code b8zs as mentioned in the very first post.
12-30-2007 12:29 PM
Hi
Try to use clocking internall on the Paradyne also ( along with the cisco also as internal)
see what is the result
if the problem has been solved or not( I know this is weried , but it happens but it can give u error but ur line protocol will be up )
If u don't get ur line protocol up check the pin connection ( v.35 cross cable b/w both of the routers
If both these solution don't solved ur problem plz past ur run conf and the sh controller status
regards
12-31-2007 04:37 AM
It probably is a configuration issue somewhere, unless you have some bad hardware, you can check that with an E1 loop back adapter on both ends with the encapsulation set to HDLC. Protocol should come up, and if all is good you will be able to pint the serials IP address. If that is the case check all the settings on both ends, pay attention to timeslots, framing settings, ect.
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