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Troubleshhoting interfaz PA-FE-TX

maucapina
Level 1
Level 1

Hi Friends

I have a problem with a network interface card PA-FE-TX on a 7206VXR router, the interface is currently operating in half duplex mode, this interface is connected to a Fast Ethernet port on a DSLAM where my clients are connected (CPEs ) but I can not change the operating mode to full duplex on the interface of the router 7206, because this causes the upload speed of customers affected by this change. I changed the network cable and the problem persists then you can see the show interfaces command output Fast Ethernet:

Should I replace the interface?

a.headend#show interfaces fastEthernet 1/0
FastEthernet1/0 is up, line protocol is up
  Hardware is DEC21140A, address is 00d0.bc5f.101c (bia 00d0.bc5f.101c)
  Description: IPMPLS-DSLAM-CUENCA
  MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,
     reliability 255/255, txload 24/255, rxload 3/255
  Encapsulation 802.1Q Virtual LAN, Vlan ID  1., loopback not set
  Keepalive set (10 sec)
  Half-duplex, 100Mb/s, 100BaseTX/FX
  ARP type: ARPA, ARP Timeout 04:00:00
  Last input 00:00:00, output 00:00:00, output hang never
  Last clearing of "show interface" counters 1y10w
  Input queue: 0/75/0/26 (size/max/drops/flushes); Total output drops: 4040
  Queueing strategy: fifo
  Output queue: 0/40 (size/max)
  5 minute input rate 2794000 bits/sec, 1456 packets/sec
  5 minute output rate 13088000 bits/sec, 1692 packets/sec
     2795496400 packets input, 174770775 bytes
     Received 1979825 broadcasts, 0 runts, 1721 giants, 1 throttles
     15831631 input errors, 15831459 CRC, 0 frame, 0 overrun, 172 ignored
     0 watchdog
     0 input packets with dribble condition detected
     3512311051 packets output, 3028779696 bytes, 0 underruns
     13 output errors, 14867511 collisions, 7 interface resets
     0 babbles, 0 late collision, 0 deferred
     12 lost carrier, 6 no carrier
     0 output buffer failures, 0 output buffers swapped out

Thanks for your help!!!

Marcelo

3 Replies 3

Reza Sharifi
Hall of Fame
Hall of Fame

Hello Marcelo,

When you have duplex mismatch, you will have slow performance and it can cause intermittent connectivity, and loss of connection

You also have a lot of CRC error which is caused by the duplex mismatch.

If you have already changed the cable, then it may be a faulty card.  It there any way for you to set the duplex to full and see what happens?

HTH

Reza

Hi  Reza

That was what I did, however like I said earlier, when I change the operating mode to full duplex, the upload speed decreases in the CPEs

Thanks for your help!

Marcelo

You have many input errors, that indicates the device to which you are connecting is faulty.

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