08-02-2012 11:59 AM - last edited on 03-25-2019 03:36 PM by ciscomoderator
Hello all, I've a question about a T1 set up that I'm working on. I'm attempting to use a 2901 router with a purchased T1 HWIC and that will go as a Point to Point (Lease line) connection back to the local network where it will connect to an adtran CSU device.
Currently there are 2 older Nortell routers with an attached CSU via a serial cable. On the "home side" the clocking is set to "network" and on the "remote" side the clocking is currently set to internal.
My problem is I can't seem to get the 2901 to connect. Currently in the lab environment there is home made cross over cable that connects fully functioninig set up from on nortell to the other. As such I'm using the same cable and putting into the HWIC on the cisco device: This is my set up:
===================================================================================================
R1#sh run
Building configuration...
Current configuration : 3735 bytes
!
! Last configuration change at 18:10:41 UTC Thu Aug 2 2012 by bcit
! NVRAM config last updated at 13:49:25 UTC Thu Aug 2 2012 by bcit
! NVRAM config last updated at 13:49:25 UTC Thu Aug 2 2012 by bcit
version 15.1
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname R1
!
boot-start-marker
boot-end-marker
!
!
logging buffered 51200 warnings
!
no aaa new-model
!
no ipv6 cef
ip source-route
ip cef
!
!
!
!
!
ip domain name yourdomain.com
multilink bundle-name authenticated
!
!
crypto pki token default removal timeout 0
!
crypto pki trustpoint TP-self-signed-2510099137
enrollment selfsigned
subject-name cn=IOS-Self-Signed-Certificate-2510099137
revocation-check none
rsakeypair TP-self-signed-2510099137
!
!
license udi pid CISCO2901/K9 sn
!
!
username privilege 15 password 0
!
!
!
!
!
!
interface Embedded-Service-Engine0/0
no ip address
shutdown
!
interface GigabitEthernet0/0
description DIA-interface
no ip address
duplex auto
speed auto
!
interface GigabitEthernet0/1
description internal
ip address 10.110.5.1 255.255.255.192
duplex full
speed auto
!
interface Serial0/0/0
ip address 10.160.3.66 255.255.255.240
encapsulation ppp
service-module t1 clock source internal
service-module t1 timeslots 1-24
!
router rip
version 2
network 10.0.0.0
!
!
ip http server
ip http access-class 23
ip http authentication local
ip http secure-server
ip http timeout-policy idle 60 life 86400 requests 10000
!
ip route 0.0.0.0 0.0.0.0 10.160.3.64
!
access-list 1 permit 10.110.0.0 0.0.255.255
access-list 1 permit 10.0.0.0 0.255.255.255
access-list 1 permit 10.160.0.0 0.0.255.255
access-list 1 permit any
access-list 100 permit ip any any
access-list 100 permit ip 10.0.0.0 0.255.255.255 any
!
!
!
control-plane
!
!
!
line con 0
login local
line aux 0
line 2
no activation-character
no exec
transport preferred none
transport input all
transport output pad telnet rlogin lapb-ta mop udptn v120 ssh
stopbits 1
line vty 0 4
access-class 23 in
privilege level 15
login local
transport input telnet ssh
line vty 5 15
access-class 23 in
privilege level 15
login local
transport input telnet ssh
!
scheduler allocate 20000 1000
end
R1#
Aug 2 18:43:15.054: %LINK-3-UPDOWN: Interface Serial0/0/0, changed state to up
R1#sh int ser
R1#sh int serial 0/0/0
Serial0/0/0 is up, line protocol is down
Hardware is GT96K with integrated T1 CSU/DSU
Internet address is 10.160.3.66/28
MTU 1500 bytes, BW 1536 Kbit/sec, DLY 20000 usec,
reliability 251/255, txload 1/255, rxload 1/255
Encapsulation PPP, LCP REQsent, loopback not set
Keepalive set (10 sec)
Last input 00:00:02, output 00:00:00, output hang never
Last clearing of "show interface" counters 20:11:23
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
381 packets input, 11428 bytes, 0 no buffer
Received 0 broadcasts (0 IP multicasts)
173 runts, 5 giants, 0 throttles
290 input errors, 14 CRC, 0 frame, 89 overrun, 0 ignored, 14 abort
773 packets output, 10822 bytes, 0 underruns
0 output errors, 0 collisions, 2494 interface resets
327 unknown protocol drops
0 output buffer failures, 0 output buffers swapped out
20 carrier transitions
DCD=up DSR=up DTR=up RTS=up CTS=up
R1#sh ip int bri
R1#sh ip int brief
Any interface listed with OK? value "NO" does not have a valid configuration
Interface IP-Address OK? Method Status Protocol
Embedded-Service-Engine0/0 unassigned YES NVRAM administratively down down
GigabitEthernet0/0 unassigned YES unset down down
GigabitEthernet0/1 10.110.5.1 YES manual down down
Serial0/0/0 10.160.3.66 YES manual up down
NVI0 unassigned NO unset up up
R1#
Aug 2 18:43:43.314: %LINK-3-UPDOWN: Interface Serial0/0/0, changed state to down
*********************************************************
Thank you for any help you guys can provide.
Message was edited by: willy moronta
08-02-2012 12:08 PM
The home made may not have everything pinned like a cisco cable.Is it a 4 wire crossover between the csu's ?
Timing on both sides should be set to line or network.
What is the far end router ?
08-02-2012 12:17 PM
There are so many errors, pointing to faulty circuit. Have telco fix, even if they claim all is fine, have them prove it's working in front of you on presemis.
08-02-2012 12:28 PM
Hello, thank you for responses.
Vmiller: The cable is a full 8 pin cross over cable made by "good union labor" and currently works in the set up. I'm on an end work station that is connected to the main network via the T1 connection
Both ends of the connection have same set up:
Nortel Router <-->serial <-->adtran CSU <--- > adtran CSu <----> Nortell router
[remote] timing currently "internal [home] timing currently "network"
I tried to change both to be internal - as I didn't see a network option on the cisco device only a line option.
The circuit is currently in a lab environment but has worked in the past. Ofcourse the old, if it ain't broke why fix it comes to mind. But we'd like to start using a Cisco device in order to do other things on it which the Nortell is incapable of.
Again, thank you very much for your replies.
08-02-2012 12:35 PM
Vmiller: The cable is a full 8 pin cross over cable made by "good union labor" and currently works in the set up. I'm on an end work station that is connected to the main network via the T1 connection
I have news for the union labourer, T1 cross only requires 2 pairs, or 4 pins:
08-02-2012 02:37 PM
Ok, so this is an inhouse test circuit is it just a cable, or is the carrier involved?
If you connect a nortel where the cisco is, do things work ?
If thats true, then there is something else amiss.
How are the adtrans set up for clock ?
08-02-2012 03:58 PM
Thanks guys you got me thinking on the right track.
I figured out the problems and in case anyone has to deal with old ARN here is a quick summary:
The MTU on nortell device is by default 1600 as opposed to cisco's 1500, the encapsulation is set to "default HDLC" which is nortell HDLC and not the same cisco's HDLC, regardless it needs to be the same on both ends, in this case we'll make it PPP. I'm still seeing a small number of errors but the connection is up now. Timing as vmiller pointed out to me needs to be the same on both sides.
I appreciate the help so far.
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