12-11-2009 02:59 PM - edited 03-04-2019 06:57 AM
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
12-11-2009 03:37 PM
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
12-11-2009 05:44 PM
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
12-12-2009 02:00 AM
You have many input errors, that indicates the device to which you are connecting is faulty.
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