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8.8

Serial Connections on Cisco Gear

Asked by donemore2003 in Network Routers, Network Operations, Network Switches & Hubs

Tags: cisco, lost, router, serial, connection

I hva e4 routers, 2 1600s, 2 2500s and 1 2600.  When I connect the serial interfaces back to back, configure IP addresses on the inrerfaces, the Serial interfaces do not come up.  I thought I had a problem with cabling, so I purchased new DCE/DTE cables but the interfaces still do not come up even if I issue the no shut commands.

I have tried configuring both ends with the clock rate command to no avail.  When I do show controllers, I see not connected or there is nothing that comes to indicate which side is the DTE or DCE.  I cannot imagine all thes e interfaces are bad.  

Here is an output for show controllers on the 2600:

Interface Serial0/0
Hardware is PowerQUICC MPC860
No serial cable attached
idb at 0x80F9C4C8, driver data structure at 0x80F9E06C
SCC Registers:
General [GSMR]=0x2:0x00000030, Protocol-specific [PSMR]=0x8
Events [SCCE]=0x0300, Mask [SCCM]=0x001F, Status [SCCS]=0x03
Transmit on Demand [TODR]=0x0, Data Sync [DSR]=0x7E7E
Interrupt Registers:

But I know ther is a cable attached to derial0 0n the 1600 router.

I see this in the logs of the 1600:

QUICC_ETHER-1-LOSTCARR: Unit 0, lost carrier. Transceiver problem?
%LINEPROTO-5-UPDOWN: Line protocol on Interface Ethernet0, changed state to down

%LINEPROTO-5-UPDOWN: Line protocol on Interface Ethernet0, changed state to up
%LINK-3-UPDOWN: Interface Serial1, changed state to up
%LINEPROTO-5-UPDOWN: Line protocol on Interface Serial1, changed state to up
%LINEPROTO-5-UPDOWN: Line protocol on Interface Serial1, changed state to down
%LINEPROTO-5-UPDOWN: Line protocol on Interface Serial1, changed state to up
%LINEPROTO-5-UPDOWN: Line protocol on Interface Serial1, changed state to down
%LINK-3-UPDOWN: Interface Serial1, changed state to down
%LINK-3-UPDOWN: Interface Serial1, changed state to up
%LINEPROTO-5-UPDOWN: Line protocol on Interface Serial1, changed state to up
%LINEPROTO-5-UPDOWN: Line protocol on Interface Serial1, changed state to down
%LINEPROTO-5-UPDOWN: Line protocol on Interface Serial1, changed state to up

ALl show controllers outputs do not give me usefull information
What am I doing wrong or what am I missing.

Thanks,
[+][-]09/11/07 07:02 AM, ID: 19868650Accepted Solution

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About this solution

Zones: Network Routers, Network Operations, Network Switches & Hubs
Tags: cisco, lost, router, serial, connection
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Solution Provided By: that1guy15
Participating Experts: 3
Solution Grade: A
 
[+][-]09/04/07 02:28 PM, ID: 19828657Expert Comment

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