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:
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
[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.
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.
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