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Serial link between 2 cisco 2500's not working help

I have a 2503 and a 2507 connected via dce to dte crossover cable on s0. I also have each router with its on switch. The problem:
2503 = router1a
2507 = router1
On router1a I get the rip update and the router to router1's switch. I can not ping it. On router1 I do not get the rip update. The serial link says that it is up/up on both routers. What is my problem. I will include the sh run and sh int for both routers.

router1#sh run
Building configuration...

Current configuration : 1464 bytes
!
version 12.2
service config
service timestamps debug uptime
service timestamps log uptime
no service password-encryption
!
hostname router1
!
logging queue-limit 100
enable secret 5 $1$d16I$iegadzRtixfeGspgzCaKk1
enable password nate
!
ip subnet-zero
!
!
!
!
hub ether 0 1
link-test
auto-polarity
!
hub ether 0 2
link-test
auto-polarity
!
hub ether 0 3
link-test
auto-polarity
!
hub ether 0 4
link-test
auto-polarity
!
hub ether 0 5
link-test
auto-polarity
!
hub ether 0 6
link-test
auto-polarity
!
hub ether 0 7
link-test
auto-polarity
!
hub ether 0 8
link-test
auto-polarity
!
hub ether 0 9
link-test
auto-polarity
!
hub ether 0 10
link-test
auto-polarity
!
hub ether 0 11
link-test
auto-polarity
!
hub ether 0 12
link-test
auto-polarity
!
hub ether 0 13
link-test
auto-polarity
!
hub ether 0 14
link-test
auto-polarity
!
hub ether 0 15
link-test
auto-polarity
!
hub ether 0 16
link-test
auto-polarity
!
interface Ethernet0
ip address 196.10.10.1 255.255.255.0
no ip mroute-cache
no cdp enable
no mop enabled
!
interface Serial0
bandwidth 1544
ip address 201.10.10.1 255.255.255.0
no ip mroute-cache
no keepalive
no cdp enable
!
interface Serial1
no ip address
no ip mroute-cache
shutdown
no cdp enable
!
router rip
version 2
network 196.10.10.0
network 201.10.10.0
no auto-summary
!
ip classless
ip http server
!
no cdp run
!
!
line con 0
exec-timeout 0 0
line aux 0
line vty 0 4
password nate
login
!
end
router1#sh int s0
Serial0 is up, line protocol is up
Hardware is HD64570
Internet address is 201.10.10.1/24
MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation HDLC, loopback not set
Keepalive not set
Last input never, output 00:10:07, output hang never
Last clearing of "show interface" counters never
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 4
Queueing strategy: weighted fair
Output queue: 125/1000/64/4 (size/max total/threshold/drops)
Conversations 20/20/256 (active/max active/max total)
Reserved Conversations 0/0 (allocated/max allocated)
Available Bandwidth 1158 kilobits/sec
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
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
3 packets output, 98 bytes, 0 underruns
0 output errors, 0 collisions, 1 interface resets
0 output buffer failures, 0 output buffers swapped out
2 carrier transitions
DCD=up DSR=up DTR=up RTS=up CTS=up

router1#sh ip protocols
Routing Protocol is "rip"
Sending updates every 30 seconds, next due in 22 seconds
Invalid after 180 seconds, hold down 180, flushed after 240
Outgoing update filter list for all interfaces is not set
Incoming update filter list for all interfaces is not set
Redistributing: rip
Default version control: send version 2, receive version 2
Interface Send Recv Triggered RIP Key-chain
Ethernet0 2 2
Serial0 2 2
Automatic network summarization is not in effect
Maximum path: 4
Routing for Networks:
196.10.10.0
201.10.10.0
Routing Information Sources:
Gateway Distance Last Update
Distance: (default is 120)

router1a#sh run
Building configuration...

Current configuration : 716 bytes
!
version 12.1
no service single-slot-reload-enable
service timestamps debug uptime
service timestamps log uptime
no service password-encryption
!
hostname router1a
!
enable secret 5 $1$fEBC$V3hq0h5oI0YfCUAXPcav3.
enable password nate
!
!
!
!
!
ip subnet-zero
!
!
!
!
interface Ethernet0
ip address 195.10.10.1 255.255.255.0
!
interface Serial0
bandwidth 1544
ip address 201.10.10.2 255.255.255.0
no keepalive
!
interface Serial1
no ip address
shutdown
!
interface BRI0
no ip address
shutdown
!
router rip
version 2
network 195.10.10.0
network 201.10.10.0
no auto-summary
!
ip classless
ip http server
!
!
snmp-server community public RO
!
line con 0
line aux 0
line vty 0 4
password nate
login
!
end

router1a#sh int s0
Serial0 is up, line protocol is up
Hardware is HD64570
Internet address is 201.10.10.2/24
MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation HDLC, loopback not set
Keepalive not set
Last input never, output 00:14:11, output hang never
Last clearing of "show interface" counters never
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: weighted fair
Output queue: 48/1000/64/0 (size/max total/threshold/drops)
Conversations 3/3/256 (active/max active/max total)
Reserved Conversations 0/0 (allocated/max allocated)
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
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
3 packets output, 329 bytes, 0 underruns
0 output errors, 0 collisions, 2 interface resets
0 output buffer failures, 0 output buffers swapped out
4 carrier transitions
DCD=up DSR=up DTR=up RTS=up CTS=up

router1a#sh ip pro
Routing Protocol is "rip"
Sending updates every 30 seconds, next due in 11 seconds
Invalid after 180 seconds, hold down 180, flushed after 240
Outgoing update filter list for all interfaces is not set
Incoming update filter list for all interfaces is not set
Redistributing: rip
Default version control: send version 2, receive version 2
Interface Send Recv Triggered RIP Key-chain
Ethernet0 2 2
Serial0 2 2
Automatic network summarization is not in effect
Maximum path: 4
Routing for Networks:
195.10.10.0
201.10.10.0
Routing Information Sources:
Gateway Distance Last Update
Distance: (default is 120)

rrhunt28

I do not see a clock rate set on your serial interfaces, Did you set it?

boulders

You will only need to set the clockrate on one of the serial interfaces for the link. Test the connectivity by enabling cdp and showing the cdp timers before testing ip pings. This will prove physical connectivity between the devices.

liqid_ice

ASKER

It was set but I had the cables switched now it is set and still the same results. Router1a receives rip update router1 does not.
router1a#sh ip route
Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter area
* - candidate default, U - per-user static route, o - ODR
P - periodic downloaded static route

Gateway of last resort is not set

R 196.10.10.0/24 [120/1] via 201.10.10.1, 00:00:14, Serial0
C 195.10.10.0/24 is directly connected, Ethernet0
C 201.10.10.0/24 is directly connected, Serial0

router1#sh ip route
Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter area
* - candidate default, U - per-user static route, o - ODR
P - periodic downloaded static route

Gateway of last resort is not set

C 196.10.10.0/24 is directly connected, Ethernet0
C 201.10.10.0/24 is directly connected, Serial0

rrhunt28

The order in which you plug the cable in does not matter. Just plug it in, then set the clock rate on BOTH serial interfaces. Now that said, only the DCE will take the clock rate, however, it is a good practive to set on both, because the router will let you know if it does not need it.

Les Moore

router#sho controller serial 0
This will show you which one has a DCE cable attached. That one only should have the clockrate command.

Turn cdp on on the serial interfaces, it is an indepsensible troubleshooting tool.

boulders

Try setting up static routes to both networks pointing to each other to eliminate any rip issues.

liqid_ice

ASKER

Ok here is something of intrest. I enabled cdp and did a sh cdp neighbor. The results were as follows. router1a showed router1 as a neighbor. Router1 did not show any neighbors. I can look at the led for the serial port. When I ping from router1 to router1a the led works. I still get failed ping. When I ping from router1a to router1 the led never works. I wonder if the serial port is in a one way mode or possibly a bad port on this router. What do ya'll think.

Les Moore

Possible. Start with some simple debugs.
debug cdp
debug rip
See what the output shows..

rrhunt28

Maybe save your current config, and redo it with something very simple just to test with.

liqid_ice

ASKER

Upon playing around here is what I found. I will up the points to 50 if someone can explain it to me. router1 = dce
router1a = dte I have only one way transmission from router1 to router1a.

I swapped dce and dte cables and enabled clock on router1a. Now everything works fine. I can ping and have rip updates for both routers. router1 = 2507 router1a =2503

This is just weird.

rrhunt28

Might have been a bad cable connection, and when you swapped it you corrected it.

liqid_ice

ASKER

No that is not the case rrhunt. I have swapped the cables back and forth. The only way for it work is for the 2503 to be the DCE side and the 2507 to be the DTE side. When I do this it works. When I swap them it does not work.

Les Moore

Did your "clockrate" command follow the dce cable, get removed on the side with the dte, and it still only works one way?

liqid_ice

ASKER

That is correct Irmoore. The clock rate follows the DCE and the DTE side will not take the command for clock rate. Like I said though. The only way for this to work is for the 2303 to have the DCE side and the 2507 to have the DTE side. I am confused as to why this is happening. I have stumped the CCNPS at my work with this. So I will up the points to 75 for info on what is the reason for this.

liqid_ice

ASKER

rrhunt28

I think he means to say, did you erase the serial and redo it, incase it kept the clockrate setting on the wrong side. You are correct that it will not take it if you try and set it, but if it is already there, you might have problems.

liqid_ice

ASKER

Yes I made sure that the clock rate was off on the DTE side.

Les Moore

What clockrate are you using?

Les Moore

What version IOS on each one?

liqid_ice

ASKER

I am using 12.2.16. The clock rate is set at 56000

Les Moore

Hmmmm.... got me stumped, too. Sorry. Could be bad serial interface on one...??

rrhunt28

Did you make sure non of the pins where bent or missing on the cable, and the router?

Les Moore

liqid_ice,
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