Allied Telesis AT-FS970M Series - Manual (Page 929)

AT-FS970M Switch Command Line User’s Guide
929
GVRP-inactive Intermediate Switches
If two GVRP-active devices are separated by a GVRP-inactive switch, the
GVRP-active devices may not be able to share VLAN information. There
are two issues involved.
The first is whether the intermediate switch forwards the GVRP PDUs that
it receives from the GVRP-active switches. GVRP PDUs are management
frames, intended for the switch’s CPU. In all likelihood, a GVRP-inactive
switch will discard the PDUs because it will not recognize them.
The second issue is that even if a GVRP-inactive switch forwards GVRP
PDUs, it will not create the VLANs, at least not automatically.
Consequently, even if GVRP-active switches receive the PDUs and create
the necessary VLANs, an intermediate switch may block the VLAN traffic,
unless you modify its VLANs and port assignments manually.