MNS-BB
Software User Guide
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17.3
Per-Port Options for Handling GVRP “Unknown VLANs”
An “unknown VLAN” is a VLAN that the switch learns of by GVRP. For example, suppose that port
1 on switch “A” is connected to port 5 on switch “C”. Because switch “A” has VLAN 22 statically
configured, while switch “C” does not have this VLAN statically configured, VLAN 22 is handled as
an “Unknown VLAN” on port 5 in switch “C”. Conversely, if VLAN 22 was statically configured on
switch C, but port 5 was not a member, port 5 would become a member when advertisements for
VLAN 22 were received from switch “A”. When you enable GVRP on a switch, you have the per-
port join-request options
The CLI
show-vlan (
command line interface VLAN Support screen) shows a switch’s current GVRP
configuration, including the Unknown VLAN settings.
LE2425A(GVRP)##
show-vlan
17.4
Per-Port Options for Dynamic VLAN Advertising and Joining
Initiating Advertisements.
As described in the preceding section, to enable dynamic joins, GVRP
must be enabled and a port must be configured to Learn (the default). However, to send
advertisements in your network, one or more Tagged or Untagged static VLANs must be configured
on one or more switches (with GVRP enabled), depending on your topology.
17.4.1 Enabling a Static VLAN for Dynamic Joins.
You can configure a port to dynamically join a static VLAN (that shares the same VID) if that port
subsequently receives an advertisement for the static VLAN. (This is done by using the
Learn
option
described in table, below.
17.4.2 Parameters for Controlling VLAN Propagation Behavior.
On an individual port, you can configure an existing static VLAN to actively or passively participate
in dynamic VLAN propagation or to ignore dynamic VLAN (GVRP) operation. These options are
controlled by the GVRP “Unknown VLAN” and the static VLAN configuration parameters, as
described in the following table:
