HP ProCurve 9304M Installation And Configuration Manual page 285

Table 35: CLI Display of PVST+ Information (Continued)
This Field...
Method
Configuration Examples
The following examples show configuration examples for two common configurations:
• Untagged IEEE 802.1Q BPDUs on VLAN 1 and tagged PVST+ BPDUs on other VLANs
• Tagged IEEE 802.1Q BPDUs on VLAN 1 and untagged BPDUs on another VLAN
Tagged Port Using Default VLAN 1 as its Port Native VLAN
Figure 8.36 shows an example of a PVST+ configuration that uses VLAN 1 as the untagged default VLAN and
VLANs 2, 3, and 4 as tagged VLANs.
Figure 8.36 Default VLAN 1 for untagged BPDUs
To implement this configuration, enter the following commands.
Commands on the HP Device
HP9300(config)# vlan-group 1 vlan 2 to 4
HP9300(config-vlan-group-1)# tagged ethernet 1/1
HP9300(config-vlan-group-1)# exit
HP9300(config)# interface ethernet 1/1
HP9300(config-if-1/1)# dual-mode
HP9300(config-if-1/1)# pvst-mode
These commands configure a VLAN group containing VLANs 2, 3, and 4, add port 1/1 as a tagged port to the
VLANs, and enable the dual-mode feature and PVST+ support on the port. The dual-mode feature allows the port
to send and receive untagged frames for the default VLAN (VLAN 1 in this case) in addition to tagged frames for
VLANs 2, 3, and 4. Enabling the PVST+ support ensures that the port is ready to send and receive PVST+
BPDUs. If you do not manually enable PVST+ support, the support is not enabled until the port receives a PVST+
BPDU.
The configuration leaves the default VLAN and the port's Port Native VLAN unchanged. The default VLAN is 1
and the port's Port Native VLAN also is 1. The dual-mode feature supports untagged frames on the default VLAN
only. Thus, port 1/1 can send and receive untagged BPDUs for VLAN 1 and can send and receive tagged BPDUs
for the other VLANs.
Port 1/1 will process BPDUs as follows:
• Process IEEE 802.1Q BPDUs for VLAN 1.
• Process tagged PVST BPDUs for VLANs 2, 3, and 4.
• Drop untagged PVST BPDUs for VLAN 1.
Configuring Spanning Tree Protocol (STP) and Advanced STP Features
Displays...
The method by which PVST+ support was enabled on the port. The
method can be one of the following:
• Set by configuration – You enabled the support.
• Set by auto-detect – The support was enabled automatically
when the port received a PVST+ BPDU.
Untagged IEEE BPDU for VLAN 1
Untagged PVST BPDU for VLAN 1
Tagged PVST BPDUs for VLANs 2, 3, 4
Port 1/1
Cisco
device
Port 3/2
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