Avaya Configuring Bridging Services Instrukcja Użytkownika Pobierz pdf (Strona 110)

Configuring Bridging Services

2-52

117351-B Rev. 00

Parameter: Bridge MAC Address

Default: Defaults to a unique MAC address that the router automatically creates

based on the router’s backplane ID.

Options: Any valid, 48-bit MAC-level address

Function: Combined with the Bridge Priority parameter, assigns a 64-bit bridge ID

to the router. Bridge Priority supplies the most significant 16 bits of the

bridge ID, while this parameter supplies the remaining (least significant)

48 bits.

The spanning tree uses the bridge ID to select the root bridge. In selecting

the root bridge, the spanning tree chooses the bridge with the

lowest-number bridge ID. Thus, the lower the value of Bridge Priority, the

more likely that the router will be selected as the root bridge. In the event

of equal bridge priority values, the Bridge MAC Address value

determines the bridge’s priority.

Instructions: Enter a 48-bit MAC address expressed as a 12-digit hexadecimal value.

You should set this parameter to the MAC address of one of the router’s

spanning tree ports, preferably the one with the lowest priority.

MIB Object ID: 1.3.6.1.4.1.18.3.5.1.1.2.1.33

Guidelines

Caution: We recommend that you not change the following three spanning

tree parameters (Max Age, Hello Time, and Forward Delay) unless absolutely

necessary. However, if you do change them, you must follow these guidelines.

Note: If the values for Max Age, Hello Time, and Forward Delay are not the

same for each bridge in your network, the root bridge parameters rule the

entire topology.

2 x (Forward Delay - 1 second) ≥ Max Age

Max Age ≥ 2 x (Hello Time + 1 second)

BRG0010A

1 2 ... 105 106 107 108 109 110 111 112 113 114 115 ... 259 260

Brak uwag

Avaya Configuring Bridging Services Instrukcja Użytkownika Strona 110