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New Member

Cisco Catalyst 4006/ Sup IV ports become unavailable

I have a pair of Catalyst 4006 with sup IV engine, both are fully populated with 10/100 48 port blades.

I started experiencing weird problems with these switches, while back when we had received our new Dell LapTops with ducking stations and also onboard NIC’s, once users move the Lap Tops out of ducking station with out shutting down or press the release button on the ducking station, the port which the duck is connected to would become unusable. I do sho interface, the port is up, the line protocol is up and no access for the PC to that port. I am running three VLANs on these Switches and each switch port is a member of one these VLANs, any help or suggestion is much appreciated. Bellow I have posted the sho interface and sho config where that port belongs.

The out put of sho interface:

FastEthernet3/34 is up, line protocol is up

Hardware is Fast Ethernet Port, address is 0003.6b3f.14e1 (bia 0003.6b3f.14e1)

MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,

reliability 255/255, txload 1/255, rxload 1/255

Encapsulation ARPA, loopback not set

Keepalive set (10 sec)

Full-duplex, 100Mb/s

ARP type: ARPA, ARP Timeout 04:00:00

Last input never, output never, output hang never

Last clearing of "show interface" counters 01:28:08

Input queue: 1216/2000/0/0 (size/max/drops/flushes); Total output drops: 0

Queueing strategy: fifo

Output queue: 0/40 (size/max)

5 minute input rate 0 bits/sec, 0 packets/sec

5 minute output rate 0 bits/sec, 0 packets/sec

14 packets input, 4358 bytes, 0 no buffer

Received 14 broadcasts, 0 runts, 0 giants, 0 throttles

0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored

0 input packets with dribble condition detected

3565 packets output, 320246 bytes, 0 underruns

0 output errors, 0 collisions, 0 interface resets

0 babbles, 0 late collision, 0 deferred

0 lost carrier, 0 no carrier

0 output buffer failures, 0 output buffers swapped out

…………………………..

The Out put of Sho config:

interface FastEthernet3/33

switchport access vlan 166

no snmp trap link-status

spanning-tree portfast

!

interface FastEthernet3/34

switchport access vlan 166

no snmp trap link-status

spanning-tree portfast

!

interface FastEthernet3/35

switchport access vlan 166

no snmp trap link-status

spanning-tree portfast

2 REPLIES
Purple

Re: Cisco Catalyst 4006/ Sup IV ports become unavailable

It's alittle vague what you are trying to say , how is the port connected to the pc once the you pull it out of the docking station ? Does the ethernet connection go thru the docking station ? If it's connected thru the docking station then you would lose connection once they pull the pc's out of the docking station . The next time it happens try clearing the mac table .

New Member

Re: Cisco Catalyst 4006/ Sup IV ports become unavailable

Well, each Lap Top has an onboard NIC, docking station has it's own NIC and a power supply, which means as far as the Switch port knows this connection is always up, though docking station may not always have a PC attached to it. Once the users go on a trip or meeting they can take their LapTops and this time use the onboard Ethernet connection. This whole thing started when users decided to yank their PC's out the docking station and take it to a boardroom with out shutting down the PC.

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