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New Member

LCV(Line code voilations) and PCV(Path code violations) on 2650XM router


We are getting a lot of LCV and PCV errors on our 2650XM router. Vendor has checked the cabling and our cables also has been checked for errors but everything seems to be fine.

We are running IOS code-12.3(13a) on our router.

Interface configuration for the router


interface Serial0/0

bandwidth 1536

no ip address

encapsulation frame-relay IETF

ip route-cache flow

logging event subif-link-status

logging event dlci-status-change

load-interval 30

no fair-queue

service-module t1 cablelength short 110ft

service-module t1 timeslots 1-24

service-module t1 fdl both

max-reserved-bandwidth 100

Int s0/0.40

interface Serial0/0.40 point-to-point

description xxxxxxx ATM2/0.228

bandwidth 1536

ip address xxxxxxxxxx

ip pim sparse-mode

ip multicast ttl-threshold 16

frame-relay interface-dlci 40

class Q-FRsi-1536-1024

New Member

Re: LCV(Line code voilations) and PCV(Path code violations) on 2


I'm going to assume this is a T1 link. First thing you should do is a hard loop test to determine if your controller is running clean. You can find the procedure here: .

If this runs clean, then loop the line at the CSU/DSU, and re-run. If it still runs clean, then have your provider test the line.



New Member

Re: LCV(Line code voilations) and PCV(Path code violations) on 2

We have tested the controller card as well as cabling on our side, vendor also tested teh circuit from thier side and they updated that theyare running clean too.

We are not sure, where the problem lies now.