3com 7600 Benutzerhandbuch
Display Static Entries in Forwarding Database
6-17
Static Addresses Allowed-to Binary Table
The Allowed-to field specifies where the frames arriving on a given
address and bridge port must be forwarded to. This field consists of two
nibbles, each of which is a hexadecimal number whose binary value
signifies the bridge ports to be forwarded to within the specified bridge.
Five bits are used, corresponding to the 5 bridge ports - 4 Fast Ethernet
ports and 1 internal ATM port as shown in the following table.
address and bridge port must be forwarded to. This field consists of two
nibbles, each of which is a hexadecimal number whose binary value
signifies the bridge ports to be forwarded to within the specified bridge.
Five bits are used, corresponding to the 5 bridge ports - 4 Fast Ethernet
ports and 1 internal ATM port as shown in the following table.
If, for example, the Allowed-to field is “f800”, then the frames will be
forwarded to bridge ports 1, 2, 3, 4, and 5. If the Allowed-to field is
“1800” then the frames will be forwarded to bridge ports 4 and 5.
forwarded to bridge ports 1, 2, 3, 4, and 5. If the Allowed-to field is
“1800” then the frames will be forwarded to bridge ports 4 and 5.
Table 6-23 Hexadecimal Codes for Displaying Multiple Bridge Ports
Bridge Ports Hex Value Bridge Ports Hex Value
1 2 3 4
5 X X X
0 0 0 1
1
0 0 0 1
1
0 0 1 0
2
0 0 1 0
2
0 0 1 1
3
0 0 1 1
3
0 1 0 0
4
0 1 0 0
4
0 1 0 1
5
0 1 0 1
5
0 1 1 0
6
0 1 1 0
6
0 1 1 1
7
0 1 1 1
7
1 0 0 0
8
1 0 0 0
8
1 0 0 1
9
1 0 0 1
9
1 0 1 0
a
1 0 1 0
a
1 0 1 1
b
1 0 1 1
b
1 1 0 0
c
1 1 0 0
c
1 1 0 1
d
1 1 0 1
d
1 1 1 0
e
1 1 1 0
e
1 1 1 1
f
1 1 1 1
f
abtthgde.book Page 17 Tuesday, June 23, 1998 10:29 AM