09-30-2003 12:57 AM - edited 03-02-2019 10:40 AM
Hi all, I am trying to connect a Cisco 1721 with 2 WIC-2T double serial cards with four Cisco 805 serial routers using PPP. Two sites connected one at each card works fine the other two shows Serial is up, line protocol is down (looped). I asked the line provider and they double checked the lines. All ok by them.
Does anybody can help about that. Is it a clock problem? How can i cchek it?
09-30-2003 03:54 AM
Unless the router or CSU on the remote end is configured to provide a line loop , there is absolutely no doubt this is a carrier problem . Under your serial interface there is a command 'down when looped' configued , remove this command , then ping your own IP address If you get your pings back then there is a loop on the line. Have the carrier break the circuit when they do if the line goes down you need to tell them to look hardrer , they have a loop up somewhere .
09-30-2003 07:22 AM
I am certain about the router. but i cannot check the CSU. I' ve tried several times the 'no down when looped' but still cannot ping the serial port's ip and the Serial is up, line protocol is down (looped),
Lost!!!
Does anybody knows how to check the clock ?
controller cmd doesnot seem to work in my case...
thanks in advance!!!
09-30-2003 08:11 AM
can you paste in your config
09-30-2003 11:58 PM
I've asked the line provider to recheck the line. I
am still waiting... the configuration is :
Current configuration : 1241 bytes
!
version 12.2
service timestamps debug uptime
service timestamps log uptime
no service password-encryption
!
hostname Cisco1721
!
enable password
!
ip subnet-zero
no ip domain-lookup
!
!
!
!
interface FastEthernet0
description connected to fragkon
ip address 192.168.0.1 255.255.255.0
speed auto
!
interface Serial0
description connected to Cisco805YC10
ip address 10.10.11.1 255.255.255.0
encapsulation ppp
!
interface Serial1
description connected to Cisco805YB01
ip address 10.10.12.1 255.255.255.0
encapsulation ppp
!
interface Serial2
description connected to Cisco805YD00
ip address 10.10.14.2 255.255.255.0
encapsulation ppp
!
interface Serial3
description connected to Cisco805YA11
ip address 10.10.13.1 255.255.255.0
encapsulation ppp
!
ip classless
ip route 192.168.0.0 255.255.255.0 FastEthernet0 permanent
ip route 192.168.1.0 255.255.255.0 10.10.11.2 permanent
ip route 192.168.2.0 255.255.255.0 10.10.13.2 permanent
ip route 192.168.3.0 255.255.255.0 10.10.12.2 permanent
ip route 192.168.4.0 255.255.255.0 10.10.14.1 permanent
no ip http server
!
!
snmp-server community
!
line con 0
exec-timeout 0 0
password
login
line aux 0
line vty 0 4
password
login
!
end
The card with the two Serial ports :
Serial2 is up, line protocol is up
Hardware is PowerQUICC Serial
Description: connected to Cisco805YD00
Internet address is 10.10.14.2/24
MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation PPP, loopback not set
LCP Open
Open: IPCP, CDPCP
Last input 00:00:13, output 00:00:05, output hang never
Last clearing of "show interface" counters 00:03:25
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 0/2/256 (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
56 packets input, 2806 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
53 packets output, 3058 bytes, 0 underruns
0 output errors, 0 collisions, 0 interface resets
0 output buffer failures, 0 output buffers swapped out
0 carrier transitions
DCD=up DSR=up DTR=up RTS=up CTS=up
Serial3 is up, line protocol is down (looped)
Hardware is PowerQUICC Serial
Description: connected to Cisco805YA11
Internet address is 10.10.13.1/24
MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation PPP, loopback not set
LCP REQsent
Closed: BRIDGECP, IPCP, CCP, CDPCP, LLC2, BACP
Last input 00:00:01, output 00:00:01, output hang never
Last clearing of "show interface" counters 00:03:26
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 1158 kilobits/sec
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
81 packets input, 1134 bytes, 0 no buffer
Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
1 input errors, 0 CRC, 1 frame, 0 overrun, 0 ignored, 0 abort
83 packets output, 1162 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
10-01-2003 02:47 AM
FInally the line provider found the loop in the circuit. all ok now thanks alot.
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