Enterasys 6000 用户指南
13-4
FRX/FRM 3. 3 User G uide, Rev 04
Bridge Node Default Parameters
1
To assure correct operation of the spanning tree algorithm, follow these rules:
a.
Bri dge Max Age
must be less than or equal to twice the value of {
Bridge Forw ard
Delay
minus 1 second}.
b.
Bri dge Max Age
must be greater than or equal to twice the value of {
Bridge Hello
Ti me
plus 1 second}.
2
SRB I D
must be
0
if the Bridge port is on an IBM Token Ring card.
3
This parameter is irrelevant on a a Token Ring FRX4000.
Bridge Enabled
enables bridging in the node, implementing the spanning tree algorithm.
If Bridging is disabled, all Bridge ports on the node will go into
Forwarding
state (described under Bridge Port Status on page 17-15). No BPDUs (see
Bridge Hello Time
below) will flow. No data will be bridged except termi-
nated LLC2 traffic.
Bridge Hello Time
is the frequency with which all bridges on the network will send "Hello" messages
(also called BPDUs, or Bridge Protocol Data Units) to adjacent bridges (the next ones
in all bridge paths) when the local bridge is "Root." Note that a root bridge is the one
with the lowest ID (which contains its Bridge Priority and MAC address) on the
network.
(also called BPDUs, or Bridge Protocol Data Units) to adjacent bridges (the next ones
in all bridge paths) when the local bridge is "Root." Note that a root bridge is the one
with the lowest ID (which contains its Bridge Priority and MAC address) on the
network.
Bridge Max Age
determines how long Hello messages will remain valid when the local bridge is root
(described under "
(described under "
Bridge Hello Time
").
Table 13-1 Bridge Node Default Parameters
Parameter
Valid Values
Default Value
Vi rtual LAN ID
n/a – accept the default
Bridge Enabled
Y/N
Y
Bridge Hello Ti me
1–10
(seconds)
1
2
Bridge Max Age
6–40
(seconds)
1
20
Bridge Forward Delay
4–30
(seconds)
1
15
Bridge Agi ng Timer
10–10000000
(seconds)
300
Bridge Priori ty
0–65535
32768
Max Siz e Bridge Forwarding Table
128–65535
65535
IP Bridging Enabl ed
Y/N
N
IPX Bridging Enabled
Y/N
N
SRB ID
0–f
(hex)
2
0
Defaul t Ethernet Frame Type
3
Type II, 802.3
Type II