troubleshooting Question

T1 CRC errors, router unresponsive

Avatar of rperry_wha
rperry_wha asked on
Networking Hardware-Other
8 Comments1 Solution720 ViewsLast Modified:
I've been trying to add in some QoS on our router.  Last night everything was fine when I left, but then today the router was unresponsive - even on the console, until I disconnected the T1 line (s0/0).  I'm seeing many errors and this happens every time I plug the line back in.  I've removed my QoS for the moment to try and diagnose the issue.  
Serial0/0 is down, line protocol is down 
  Hardware is PQUICC with Fractional T1 CSU/DSU
  Description: T-1 to Supranet
  Internet address is 10.255.255.2/30
  MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec, 
     reliability 240/255, txload 1/255, rxload 1/255
  Encapsulation PPP, LCP Closed, loopback not set
  Keepalive set (10 sec)
  Last input never, output 00:00:07, output hang never
  Last clearing of "show interface" counters 00:04:22
  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
     0 packets input, 0 bytes, 0 no buffer
     Received 0 broadcasts, 0 runts, 1 giants, 0 throttles
     1040186 input errors, 453896 CRC, 420518 frame, 0 overrun, 10179 ignored, 165771 abort
     2 packets output, 28 bytes, 0 underruns
     0 output errors, 0 collisions, 9 interface resets
     0 output buffer failures, 0 output buffers swapped out
     2 carrier transitions
     DCD=down  DSR=up  DTR=up  RTS=up  CTS=down
 
 
 
 
 
 
 
 
show run:
 
!
interface Serial0/0
 description T-1 to Supranet
 ip address 10.255.255.2 255.255.255.252
 encapsulation ppp
!

Open in new window

ASKER CERTIFIED SOLUTION
Faruk Onder Yerli
CTO

Our community of experts have been thoroughly vetted for their expertise and industry experience.

Log in to continue reading
Become an EE member today7-DAY FREE TRIAL
Members can start a 7-Day Free trial then enjoy unlimited access to the platform for $9.99/mo
View membership options
Unlock 1 Answer and 8 Comments.
or
Learn why we charge membership fees
We get it - no one likes a content blocker. Take one extra minute and find out why we block content.
See how we're fighting big data
The Value of Experts Exchange in My Daily IT Life

Experts Exchange (EE) has become my company's go-to resource to get answers. I've used EE to make decisions, solve problems and even save customers. OutagesIO has been a challenging project and... Keep reading >>

Mike

Owner of Outages.IO
Phoenix, Arizona, United States
Member Since 2016
Join a full scale community that combines the best parts of other tools into one platform.
Unlock 1 Answer and 8 Comments.
View membership options
“All of life is about relationships, and EE has made a virtual community a real community. It lifts everyone's boat.”
William Peck

Member since 2004