cisco line protocal problem on serial interface

Hello CIB3RGUY,

Enable "debug serial interface" & capture the debugs and post it here. If possible, capture it on both routers at the same time. configuring "service timestamps debug datetime msec" would be beneficial when collecting debugs.

Cheers, Jeff

Hi Jeff: First of all thanks for the help.

This is the debug from the main host router with router configuration: ======================================================================== Using 1815 out of 29688 bytes ! version 12.0 service timestamps debug datetime msec localtime service timestamps log datetime msec localtime service password-encryption service udp-small-servers service tcp-small-servers ! hostname ITASCA_1 ! boot system flash 1:aaa0074.bin logging buffered 4096 debugging enable secret 5 enable password 7 ! no ip subnet-zero no ip domain-lookup ! ipx routing 0050.0f02.38e6 clock timezone CST -6 clock summer-time CDT recurring ! ! ! interface Loopback0 description : For Serial(WAN) interfaces and Telnet. ip address 192.168.101.1 255.255.255.0 no ip directed-broadcast ! interface Serial0 description Melrose_Park ip unnumbered Loopback0 no ip directed-broadcast ip tcp header-compression ipx network C20 ! interface Serial1 description unused ip unnumbered Loopback0 no ip directed-broadcast ip tcp header-compression ipx network C18 ! interface Serial2 description Diversey ip unnumbered Loopback0 no ip directed-broadcast ip tcp header-compression ipx network C19 ! interface Serial3 description unused ip unnumbered Loopback0 no ip directed-broadcast ip tcp header-compression ! interface FastEthernet0 description : Itasca LAN ip address 192.168.1.1 255.255.255.0 no ip directed-broadcast ipx network 1E1 encapsulation SAP ! router eigrp 1 network 192.168.1.0 network 192.168.101.0 ! router rip redistribute eigrp 1 network 192.168.1.0 default-metric 2 ! ip classless ! ! ! ipx router eigrp 1 network C18 network C19 network C20 ! ! ipx router rip no network C20 no network C18 no network C19 ! ! ! snmp-server location Itasca, IL snmp-server contact RMI Network Services, Inc. 847-490-0044 ! ! line con 0 exec-timeout 0 0 transport input none line aux 0 line vty 0 4 password login ! no scheduler allocate end ================================================================================== Feb 28 18:10:33.947: Serial2: HDLC myseq 62, mineseen 29, yourseen 30, line dow n

*Feb 28 18:10:53.947: Serial2: HDLC myseq 64, mineseen 29, yourseen 30, line dow n

*Feb 28 18:11:23.947: Serial2: HDLC myseq 67, mineseen 29, yourseen 30, line dow n =========================================================================================

The debug from the other router is:

=========================================================================================

I have run the loop tests from the CSU to the routers and they are fine. I mean when they are connected to the CSU with the loop connector the protocol is up when they are connected to the circuit the protocol is down. Its is completeley down at the main host location and goes up and down at the remote location.

Thanks.

CIB3RGUY

What is your linecode set at? Is it the same on your router as on the card from your provider? I have seen where the linecodes are not the same and you will not have a live interface due to it.