I'm seeing 3716 deferred frames on a 10/full interface. I suspect a duplex mismatch even though the Telco assures me that their interface is 10/full as well. Anybody seen this problem on another 2950 switch?

Router#show int fa0/1 FastEthernet0/1 is up, line protocol is up (connected) Hardware is Fast Ethernet, address is 000e.38a0.3901 (bia 000e.38a0.3901) Description: MTU 1500 bytes, BW 10000 Kbit, DLY 1000 usec, reliability 255/255, txload 1/255, rxload 1/255 Encapsulation ARPA, loopback not set Keepalive set (10 sec) Full-duplex, 10Mb/s input flow-control is off, output flow-control is off ARP type: ARPA, ARP Timeout 04:00:00 Last input 00:00:00, output 00:00:05, output hang never Last clearing of "show interface" counters 6w0d Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0 Queueing strategy: fifo Output queue :0/40 (size/max) 30 second input rate 0 bits/sec, 0 packets/sec 30 second ouxtput rate 0 bits/sec, 0 packets/sec 2979697 packets input, 477032533 bytes, 0 no buffer Received 2612753 broadcasts, 241 runts, 0 giants, 0 throttles 316 input errors, 0 CRC, 75 frame, 0 overrun, 0 ignored 0 watchdog, 2612346 multicast, 0 pause input 0 input packets with dribble condition detected 1110744 packets output, 296966944 bytes, 0 underruns 0 output errors, 0 collisions, 0 interface resets 0 babbles, 0 late collision, 3716 deferred 0 lost carrier, 0 no carrier, 0 PAUSE output 0 output buffer failures, 0 output buffers swapped out

IOS (tm) C2950 Software (C2950-I6Q4L2-M), Version 12.1(13)EA1, RELEASE SOFTWARE (fc1) Copyright (c) 1986-2003 by cisco Systems, Inc. Compiled Tue 04-Mar-03 02:14 by yenanh Image text-base: 0x80010000, data-base: 0x805A8000 Model number: WS-C2950-12