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198 C
HAPTER
9: B
RIDGE
-W
IDE AND
B
RIDGE
P
ORT
P
ARAMETERS
send updates, or if GVRP is disabled, or if the module is rebooted, all
dynamic VLANs are removed.
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GVRP manages the active topology, not nontopological data such as
VLAN protocols. If a local bridge needs to classify and analyze frames
by VLAN protocols, you must manually configure protocol-based
VLANs and simply rely on GVRP to send VLAN ID updates. But if the
local bridge needs to know only how to reach a given VLAN, then
GVRP provides all necessary information.
■
The VLAN topologies that GVRP learns are treated differently from
VLANs that are statically configured. Although static updates are
saved in nonvolatile RAM, GVRP’s dynamic updates are not. When
GVRP is disabled, the module deletes all VLAN interfaces that were
learned through GVRP and leaves unchanged all VLANs that were
configured through the Administration Console or through the Web
management software.
Standards,
Protocols, and
Related Reading
Refer to the following standard for more information about the bridging
methodology described in this chapter:
■
IEEE 802.1D — This standard specifies requirements for transparent
bridging.
■
IEEE 802.1Q — This standard defines a new frame format, GVRP, and
the dynamic registration of VLANs.
To obtain copies of these standards, register for an on-line subscription at
the Institute of Electrical and Electronics Engineers (IEEE) Web site:
http://www.ieee.org