HP procurve 2500 Manuale Utente

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Enhancements in Release F.05.05 through F.05.60

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VLAN 33 becomes unavailable to port 2 for the duration of the session (because there can 
be only one untagged VLAN on any port).

You can use the 

show vlan < vlan-id > command to view this temporary change to the active 

configuration, as shown below:

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You can see the temporary VLAN assignment by using the 

show vlan < vlan-id > command with 

the 

< vlan-id > of the static VLAN that the authenticated client is using. 

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With the preceding in mind, since (static) VLAN 33 is configured as untagged on port 2 (see 
figure 16), and since a port can be untagged on only one VLAN, port 2 loses access to VLAN 
33 for the duration of the 802.1X session involving VLAN 22. You can verify the temporary 
loss of access to VLAN 33 with the 

show vlan 33 command. 

This entry shows that port 2 is temporarily untagged on 
VLAN 22 for an 802.1X session. This is to accommodate an 
802.1X client’s access, authenticated by a RADIUS server, 
where the server included an instruction to put the client’s 
access on VLAN 22.

Note: With the current VLAN configuration (figure 16), the only time port 2 appears in this show vlan 22 listing is during 
an 802.1X session with an attached client. Otherwise, port 
2 is not listed.