Port numbering question

[dmayne]

When viewing the syslog on a 3500 xl switch I have encountered messages that refer to port numbers that do not seem to exist on the switch. For example:

Add address 000c.4114.3468, on port 54 vlan 1

Delete address 0090.2707.b0e0, on port 54 vlan 1

Add address 000d.6024.aef1, on port 54 vlan 1

Add address 00d0.59b7.19e0, on port 62 vlan 59

Add address 0002.5557.2d16, on port 62 vlan 59

Add address 0001.e6a6.a6ee, on port 54 vlan 1

Delete address 000f.1f83.b71d, on port 54 vlan 1

Add address 0009.6b50.7f45, on port 62 vlan 59

Add address 0001.03c4.3636, on port 54 vlan 1

Add address 0006.254a.b177, on port 54 vlan 1

Add address 0009.6ba7.e840, on port 62 vlan 59

Add address 0004.c0ac.dcc0, on port 54 vlan 1

Add address 0009.6b50.7ede, on port 62 vlan 59

Add address 000d.607e.96d3, on port 54 vlan 1

Add address 00c0.4f38.ecd2, on port 54 vlan 1

Add address 00b0.d0e8.4d5c, on port 62 vlan 59

Add address 0010.a490.2273, on port 62 vlan 59

Delete address 0001.e6a6.761e, on port 54 vlan 1

If the port # is supposed to = the interface number, then something is not right.

If the port # corresponds to the spanning-tree port number then it would make a little more sense. However, some of these port #'s do not even correspond to a spanning-tree port number!!!

Can someone set me straight on what the port number in the syslog is actually referring to?

[dave.keith]

This is a guess : are they SNMP interface indexes ? If the unit is a 3548XL, then it might make sense. To confirm, I'd use a small, free utility called getif, which is a great little SNMP thingy. Enter the switch IP and community string, hit start, then go to the MIB browser and drill down to the ifDescr variable. This will list the interfaces (including VLANs, fastethernet, and others like null) by index.

Dave

[Kevin Dorrell]

They are virtual VLAN interfaces, which you can see by doing the SNMP walk on the device.

Kevin Dorrell

Luxembourg