Cabletron Systems SmartSTACK STS16-20RM Installation And User Manual page 91

Configured MAC Address
The MAC address that is currently in use, or, if a new MAC address has been
configured, the MAC address that will be used after the next boot. If a locally
administered address is assigned to the switch, this field displays that address.
Otherwise, the field displays 000000:000000. To assign a locally administered
address, select this field, and enter the new address. Note that the switch occupies
this address, the base MAC address, and possibly the next 96 addresses.
To configure a LAA address, use the Switch Configuration screen from a console
session or an SNMP based management tool. Note that a restart is necessary when
changing the base MAC address.
The greeting screen on the console will always show the current active Switch base
Address.
The switch reserves 31 addresses for ports.
The Token Ring ports on a switch will be assigned MAC addresses using the
following scheme:
•
BASE Module port 1- 20
•
LEFT SSIM port 1-4
•
RIGHT SSIM port 1-4
OR:
A Token Ring port will be assigned a MAC address, which is Switch Base Address
+ the port number displayed on the port configuration screen (or interface table for
SNMP).
This MAC address is used for the Token Ring MAC protocol, and for the spanning
tree protocol.
The switch reserves 63 addresses for BRF ( VLAN).
Each VLAN has an attached bridge relay function (BRF) and a management entity
(IP-protocol stack), and consequently it needs a MAC Address. In the switch, these
two logical units use the same address, however this address must be unique in the
network. This is ensured by assigning MAC address to BRFs from the Switch Base
Address + 32 (0x20) and upwards. The switch is designed in such a way, that it
operates with 63 active or preferred VLAN's, implying that 63 MAC addresses
need to be reserved for BRF.
Switch Configuration
Will be assigned Switch Base Address + port
number
Will be assigned Switch Base Address + 20 +
port number
Will be assigned Switch Base Address + 24 +
port number
SmartStack STS16-20RM/STS16-20FRM Token Ring Switches, P/N: 9032957-01
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