Viewing the switch's MAC address assignments for VLANs configured on the switch

The Management Address Information screen lists the MAC addresses for:

Base switch (default VLAN; VID=1)
Any additional VLANs configured on the switch.

Also, the Base MAC address appears on a label on the back of the switch.


	NOTE: The Base MAC address is used by the first (default) VLAN in the switch. This is usually the VLAN named "DEFAULT_VLAN" unless the name has been changed (by using the VLAN Names screen.) On the switches covered in this guide, the VID (VLAN identification number) for the default VLAN is always "1," and cannot be changed.

From the Main Menu, select

1. Status and Counters

2. Switch Management Address Information

If the switch has only the default VLAN, the following screen appears. If the switch has multiple static VLANs, each is listed with its address data.

Example of the Management Address Information screen

Viewing the port and VLAN MAC addresses

The MAC address assigned to each switch port is used internally by such features as Flow Control and the spanning-tree protocol. Using the walkmib command to determine the MAC address assignments for individual ports can sometimes be useful when diagnosing switch operation.

Switch series' and their MAC address allocations

Switch series	MAC address allocation
8212zl	The switch allots 24 MAC addresses per slot. For a given slot, if a four-port module is installed, the switch uses the first four MAC addresses in the allotment for that slot, and the remaining 18 MAC addresses are unused. If a 24-port module is installed, the switch uses the first 24 MAC addresses in the allotment, and so on.
All Models	The switch's base MAC address is assigned to VLAN (VID) 1 and appears in the `walkmib` listing after the MAC addresses for the ports. (All VLANs in the switch have the same MAC address.)

Switch series

MAC address allocation

8212zl

The switch allots 24 MAC addresses per slot. For a given slot, if a four-port module is installed, the switch uses the first four MAC addresses in the allotment for that slot, and the remaining 18 MAC addresses are unused.

If a 24-port module is installed, the switch uses the first 24 MAC addresses in the allotment, and so on.

All Models

The switch's base MAC address is assigned to VLAN (VID) 1 and appears in the walkmib listing after the MAC addresses for the ports. (All VLANs in the switch have the same MAC address.)


	NOTE: This procedure displays the MAC addresses for all ports and existing VLANs in the switch, regardless of which VLAN you select.

If the switch is at the CLI Operator level, use the enable command to enter the Manager level of the CLI.
Enter the following command to display the MAC address for each port on the switch:
```
HP Switch# walkmib ifPhysAddress
```
(The above command is not case-sensitive.)

Example

A 8212zl switch with the following module configuration shows MAC address assignments similar to those shown in Example of Port MAC address assignments on a switch:

A 4-port module in slot A, a 24-port module in slot C, and no modules in slots B and D

Two non-default VLANs configured

Example of Port MAC address assignments on a switch

NOTE: When configuring an "out" monitor on a VLAN or an interface to a remote mirror, the mirrored packet will always be untagged when the original packet arrives on a zlV2 module, or a 3800 series.

When configuring a "both" monitor on an interface to a remote mirror, tags will not be present in the mirrored packet in these specific situations:

For an interface monitor, packets transmitted by the monitored port that originally arrived on a zlV2 module or 3800 port.
For a VLAN monitor, packets routed onto the monitored VLAN that originally arrived on a zlV2 module or 3800 port.

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