HP ProCurve 9304M Installation And Configuration Manual page 284

Installation and Basic Configuration Guide
• The link is disconnected or broken
• The link is administratively disabled
• The link is disabled by interaction with the link-keepalive protocol
This allows a port that was originally interoperating with PVST+ to revert to MSTP when connected to an HP
device.
Enabling PVST+ Support Manually
To immediately enable PVST+ support on a port, enter commands such as the following:
HP9300(config)# interface ethernet 1/1
HP9300(config-if-1/1)# pvst-mode
Syntax: [no] pvst-mode
NOTE: If you disable PVST+ support, the software still automatically enables PVST+ support if the port receives
a BPDU with PVST+ format.
Enabling Dual-Mode Support
To enable the dual-mode feature on a port, enter the following command at the interface configuration level for the
port:
HP9300(config-if-1/1)# dual-mode
Syntax: [no] dual-mode [<vlan-id>]
The <vlan-id> specifies the port's Port Native VLAN. This is the VLAN on which the port will support untagged
frames. By default, the Port Native VLAN is the same as the default VLAN (which is VLAN 1 by default).
For more information about the dual-mode feature, see "Dual-Mode VLAN Ports" on page 11-54.
Displaying PVST+ Support Information
To display PVST+ information for ports on an HP device, enter the following command at any level of the CLI:
HP9300(config)# show span pvst-mode
PVST+ Enabled on:
Port Method
1/1 Set by configuration
1/2 Set by configuration
2/10 Set by auto-detect
3/12 Set by configuration
4/24 Set by auto-detect
Syntax: show span pvst-mode
NOTE: This command is present in earlier releases but the output format has been changed to reflect the feature
enhancements.
This command displays the following information.
This Field...
Port
8 - 78
Table 35: CLI Display of PVST+ Information
Displays...
The HP port number.
Note: The command lists information only for the ports on which
PVST+ support is enabled.