Справочник Пользователя для Enterasys Networks 2E253
How It Works
A-2
Generic Attribute Registration Protocol (GARP)
A.2
HOW IT WORKS
, Switch 4, port 1 is registered as being a member of VLAN Blue and then declares
this fact out all its ports (2 and 3) to Switch 1 and Switch 2. These two switches register this in the
Port VLAN Lists of the ports (Switch 1, port 1 and Switch 2, port 1) that received the frames with
the information. Switch 2, which is connected to Switch 3 and Switch 5 declares the same
information to those two switches and the Port VLAN List of each port is updated with the new
information, accordingly.
Port VLAN Lists of the ports (Switch 1, port 1 and Switch 2, port 1) that received the frames with
the information. Switch 2, which is connected to Switch 3 and Switch 5 declares the same
information to those two switches and the Port VLAN List of each port is updated with the new
information, accordingly.
Figure A-1
Example of VLAN Propagation via GVRP
Configuring a VLAN on an 802.1Q switch creates a static GVRP entry. The entry will always
remain registered and will not time out. However, dynamic entries will time-out and their
registrations are removed from the member list if the end station A is removed. This ensures that if
switches are disconnected, or if end stations are removed, the registered information remains
accurate.
remain registered and will not time out. However, dynamic entries will time-out and their
registrations are removed from the member list if the end station A is removed. This ensures that if
switches are disconnected, or if end stations are removed, the registered information remains
accurate.
The end result is that the Port VLAN List of a port is updated with information about VLANs that
reside off that port, even if the actual station on the VLAN is several hops away.
reside off that port, even if the actual station on the VLAN is several hops away.
D
End
Station A
Switch 1
Switch 2
Switch 3
Switch 4
Switch 5
R
R
R
R
D
D
D
= Port registered as a member of VLAN Blue
= Port declaring VLAN Blue
D
R
30691_77
1
1
1
1
1
2
2
3
3
R