HP procurve 2500 Manuel D’Utilisation

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Fast-Uplink Spanning Tree Protocol (STP)

spanning-tree e <port/trunk-list> mode uplink

HP2512(config)# spanning-tree e 1,trk1 mode uplink

Operating Notes

When configured, fast-uplink STP operates 

on the designated ports in a running Series 2500 switch.  However, if the switch experiences a reboot, 
the fast-uplink ports (Mode = 

) use the longer forwarding delay used by ports on standard 802.1D 

STP (non fast-uplink). This prevents temporary loops that could otherwise result while the switch is 
determining the STP status for all ports. That is, on ports configured for fast-uplink STP, the first STP 
state transition after a reboot takes the same amount of time as for redundant ports that are not 
configured for fast-uplink STP. 

To use a port trunk for fast-uplink STP, configure it in the 

same way that you would an individual port for the same purpose. A port trunk configured for fast 
uplink operates in the same way as an individual, non-trunked port operates; that is, as a logical port. 

When you add a port to a trunk, the port takes on the STP mode configured for the trunk, regardless 
of which STP mode was configured on the port before it was added to the trunk. Thus, all ports 
belonging to a trunk configured with 

 in the STP 

 field will operate in the fast-uplink mode. 

(If you remove a port from a trunk, the port reverts to the STP Mode setting it had before you added 
the port to the trunk.

To use fast uplink over a trunk, you must:

1.

Create the trunk.

2.

Configure the trunk for fast uplink in the same way that you would configure an individual port 
for fast uplink. 

When you first create a port trunk, its STP Mode setting will be 

, regardless of whether one or 

more ports in the trunk are set to fast uplink (Mode = 

). You must still specifically configure the 

trunk Mode setting to 

. Similarly, if you eliminate a trunk, the Mode setting on the individual 

ports in the trunk will return to their previous settings.