Extreme Networks ExtremeWare XOS 11.0, Command Reference Manual

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524 ExtremeWare XOS 11.0 Command Reference Guide
STP Commands
enable stpd auto-bind
enable stpd <stpd_name> auto-bind vlan <vlan_name>
Description
Automatically adds ports to an STPD when ports are added to a member VLAN.
Syntax Description
Default
The autobind feature is disabled.
If you enable autobind and add ports to a member VLAN, those ports are automatically added to the
STPD.
Usage Guidelines
If you create an STPD and a VLAN with unique names, the keywords
stpd
and
vlan
are optional.
When you issue this command, any port or list of ports that you add to the carrier VLAN are
automatically added to the STPD with autobind enabled. In addition, any port or list of ports that you
remove from a carrier VLAN are automatically removed from the STPD. This allows the STPD to
increase or decrease its span as you add ports to or remove ports from a carrier VLAN.
Carrier VLAN.
A carrier VLAN defines the scope of the STPD, which includes the physical and logical
ports that belong to the STPD and the 802.1Q tag used to transport STP BPDUs. Only one carrier VLAN
can exist in a given STPD, although some of its ports can be outside the control of any STPD at the
same time.
NOTE
The StpdID must be identical to the VLANid of the carrier VLAN in that STPD.
Protected VLAN. Protected VLANs are all other VLANs that are members of the STPD. These VLANs
“piggyback” on the carrier VLAN. Protected VLANs do not transmit or receive STP BPDUs, but they
are affected by STP state changes and inherit the state of the carrier VLAN. Protected VLANs can
participate in multiple STPDs, but any particular port in the VLAN can belong to only one STPD.
Enabling autobind on a protected VLAN does not expand the boundary of the STPD. However, the
VLAN and port combinations are added to or removed from the STPD subject to the boundaries of the
carrier VLAN.
To view STP configuration status of the ports on a VLAN, use the following command:
show vlan <vlan_name> stpd
stpd_name Specifies an STPD name on the switch.
vlan_name Specifies the name of the VLAN to have autobind enabled.