Olicom CrossFire 8600, Руководство по эксплуатации

Страница: 98 / 250

82
CrossFire 8600/8605 Token-Ring Switches v. 1.2, P/N: 710001641 Switch Configuration
assigned Universal Administrated Address UAA) or configured (the Local
Administrated Address LAA). 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 switch will be assigned MAC addresses using
the following scheme:
•
BASE Module port 1- 20 Will be assigned Switch Base A port
number
•
LEFT UEM port 1-4 Will be assigned Switch Base A 20 +
port number
•
RIGHT UEM port 1-4 Will be assigned Switch Base A 24 +
port number
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 TrBRF ( VLAN).
Each VLAN has an attached Bridge relay function (TrBRF) 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 TrBRF’s from the
Switch Base A 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 TrBRF.
Summarizing each CrossFire 8600 reserve: Switch Base A 31 Addresses
for Token-Ring ports + 63 MAC Addresses for TrBRFs = 95, which is rounded up
to 96 or hexadecimal 0x60.
The MAC address of the default TrBRF (trnet-default) will always be the switch
base a 32. If the switch operates in a stack, only one of the switches will
operate the bridge relay function. Hence the MAC address of the default TrBRF
will be the base address of the stack 32. The stackmaster is determined by
software, when the stack consists of two switches back to back and by the port