Hi all, I have a two switches C2950G and C2924XL connected via canopy backhaul in trunk ports running fine for several months.Suddenly due to some reason I have to shut the link. But, I noticed that even the switch port is administratively shutdown at C2950G end, it is still sending/receiving traffic and learning mac..even after several attempt no shut n' shut and clearing mac address tables...thus created problem in my network. Finally I had to shut the interface at C2924XL and then everything came back to normal. Since the switch was located at remote site I was not able to see the actual status of the led of the switch port.
sw-pck-01#sh mac-address-table address 0a00.3e01.2578 Mac Address Table ------------------------------------------- Vlan Mac Address Type Ports ---- ----------- -------- ----- 1 0a00.3e01.2578 DYNAMIC Fa0/17 Total Mac Addresses for this criterion: 1 sw-pck-01#sh run int fa 0/17 Building configuration... Current configuration : 150 bytes ! interface FastEthernet0/17 description bh-pck-kot (0.59) switchport mode trunk switchport nonegotiate shutdown duplex full no cdp enable end sw-pck-01#sh int fa 0/17 FastEthernet0/17 is administratively down, line protocol is down (disabled) Hardware is Fast Ethernet, address is 000f.2451.b191 (bia 000f.2451.b191) Description: bh-pck-kot (0.59) MTU 1500 bytes, BW 100000 Kbit, DLY 1000 usec, reliability 255/255, txload 4/255, rxload 1/255 Encapsulation ARPA, loopback not set Keepalive set (10 sec) Full-duplex, 100Mb/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 1w6d, output hang never Last clearing of "show interface" counters never Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0 Queueing strategy: fifo Output queue: 0/40 (size/max) 5 minute input rate 733000 bits/sec, 649 packets/sec 5 minute output rate 1579000 bits/sec, 1877 packets/sec 946735717 packets input, 1839595370 bytes, 0 no buffer Received 123547463 broadcasts (0 multicast) 0 runts, 0 giants, 0 throttles 104450 input errors, 104450 CRC, 0 frame, 0 overrun, 320 ignored 0 watchdog, 4628766 multicast, 0 pause input 0 input packets with dribble condition detected 1054932314 packets output, 1910036997 bytes, 0 underruns 0 output errors, 0 collisions, 16 interface resets 0 babbles, 0 late collision, 0 deferred 0 lost carrier, 0 no carrier, 0 PAUSE output 0 output buffer failures, 0 output buffers swapped out sw-pck-01# sw-pck-01#sh mac-address-table interface fastEthernet 0/17 Mac Address Table ------------------------------------------- Vlan Mac Address Type Ports ---- ----------- -------- ----- 1 0000.0c5d.ad12 DYNAMIC Fa0/17 1 0000.1cd0.2e1a DYNAMIC Fa0/17 1 0000.21fe.c1a4 DYNAMIC Fa0/17 1 0000.21ff.963d DYNAMIC Fa0/17 1 0000.b4bb.be24 DYNAMIC Fa0/17 1 0000.e850.6537 DYNAMIC Fa0/17 1 0000.e850.655e DYNAMIC Fa0/17 1 0000.e850.a4f0 DYNAMIC Fa0/17 1 0000.e860.9c1b DYNAMIC Fa0/17 1 0000.e890.abf4 DYNAMIC Fa0/17 1 0000.e8a0.04a6 DYNAMIC Fa0/17 1 0001.0263.1524 DYNAMIC Fa0/17 1 0001.29d0.254a DYNAMIC Fa0/17 1 0001.2e05.feb6 DYNAMIC Fa0/17 1 0002.3f17.a8c2 DYNAMIC Fa0/17 1 0002.4452.eb23 DYNAMIC Fa0/17 1 0002.446b.11e5 DYNAMIC Fa0/17 1 0002.446c.1ec5 DYNAMIC Fa0/17 1 0002.447f.de44 DYNAMIC Fa0/17 1 0002.447f.de5a DYNAMIC Fa0/17 1 0002.4489.561a DYNAMIC Fa0/17 1 0002.b95e.d600 DYNAMIC Fa0/17 1 0002.e334.4ffc DYNAMIC Fa0/17 1 0002.e34d.1dd6 DYNAMIC Fa0/17 1 0003.2f35.bae0 DYNAMIC Fa0/17 1 0003.2f3b.7dab DYNAMIC Fa0/17 1 0003.47c0.555b DYNAMIC Fa0/17 1 0003.ce88.6c2c DYNAMIC Fa0/17 1 0004.2e01.0564 DYNAMIC Fa0/17 1 0004.2e01.5c68 DYNAMIC Fa0/17 1 0004.5af1.45b7 DYNAMIC Fa0/17 1 0004.dd0c.d35e DYNAMIC Fa0/17 --More-- _______________________________________________ cisco-nsp mailing list cisco-nsp@puck.nether.net https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/