Configuring VLAN Behavior for Interfaces
You can configure VLAN behavior for specific interfaces, including the default
VLAN identifier (PVID), accepted frame types, ingress filtering, GVRP status,
and GARP timers.
Command Usage
> GVRP – GARP VLAN Registration Protocol defines a way for switches to
exchange VLAN information in order to automatically register VLAN members
on interfaces across the network.
> GARP – Group Address Registration Protocol is used by GVRP to register or
deregister client attributes for client services within a bridged LAN. The default
values for the GARP timers are independent of the media access method or
data rate. These values should not be changed unless you are experiencing
difficulties with GVRP registration/deregistration.
Command Attributes
> PVID – The VLAN ID assigned to untagged frames received on the interface. If
the (CLI) switchport mode is set to trunk (see page 3-95), the PVID will be
inserted into all untagged frames sent from a tagged port. (Default: 1)
> Acceptable Frame Type – Sets the interface to accept all frame types, includ-
ing tagged or untagged frames, or only tagged frames. If only tagged frames
are accepted, the switch will only accept frames if the frame tag matches a
VLAN to which this interface has been assigned. (Default: All)
> Ingress Filtering – If ingress filtering is enabled, incoming frames for VLANs
which do not include this ingress port in their member set will be discarded at
the ingress port. This will not affect VLAN independent BPDU frames, such as
GVRP or STP. (Default: Disabled)•
> GVRP Status – Enables/disables GVRP for the interface. GVRP must be glob-
ally enabled for the switch before this setting can take effect. (See “Displaying
Bridge Extension Capabilities” on page 2-19.) When disabled, any GVRP
packets received on this port will be discarded and no GVRP registrations will
be propagated from other ports. (Default: Enabled)
> GARP Join Timer – The interval between transmitting requests/ queries to
participate in a VLAN group. (Default: 20 centiseconds)
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