Extreme Networks ExtremeWare XOS 11.3, Manual

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Spanning Tree Protocol
ExtremeWare XOS 11.3 Concepts Guide
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or
pvst-plus
), the STP port mode is changed to match; otherwise, the STP port inherits either the
carrier VLANs encapsulation mode on that port or the STPD’s default encapsulation mode.
To remove ports, use the following command:
configure stpd <stpd_name> delete vlan <vlan_name> ports [all | <port_list>]
If you manually delete a protected VLAN or port, only that VLAN or port is removed. If you manually
delete a carrier VLAN or port, all VLANs on that port (both carrier and protected) are deleted from that
STPD.
To learn more about member VLANs, see “Member VLANs” on page 424 . For more detailed
information about these command line interface (CLI) commands, see the ExtremeWare XOS Command
Reference Guide .
Automatically Binding Ports
To automatically bind ports to an STPD when the ports are added to a VLAN, use the following
command:
enable stpd <stpd_name> auto-bind vlan <vlan_name>
The autobind feature is disabled on user-created STPDs. The autobind feature is enabled on the default
VLAN that participates in the default STPD S0.
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 feature allows the STPD
to increase or decrease its span as ports are added to or removed from a carrier VLAN.
NOTE
The carrier VLAN’s VLANid must be identical to the StpdID of the STP domain.
Enabling autobind on a protected VLAN does not expand the boundary of the STPD. If the same set of
ports are members of the protected VLAN and the carrier VLAN, protected VLANs are aware of STP
state changes. For example, assume you have the following scenario:
●
Carrier VLAN named v1
●
v1 contains ports 3:1-3:2
●
Protected VLAN named v2
●
v2 contains ports 3:1-3:4
Since v1 contains ports 3:1-3:2, v2 is aware only of the STP changes for ports 3:1 and 3:2, respectively.
Ports 3:3 and 3:4 are not part of the STPD, which is why v2 is not aware of any STP changes for those
ports.
In addition, enabling autobind on a protected VLAN causes ports to be automatically added or
removed as the carrier VLAN changes.
To remove ports, use the following command:
configure stpd <stpd_name> delete vlan <vlan_name> ports [all | <port_list>]