Enhancements in Release F.02.11

Fast-Uplink Spanning Tree Protocol (STP)

In figure 75:

Port 1 and Trk1 (trunk 1; formed from ports 2 and 3) are redundant fast-uplink STP links, with trunk 1 forwarding (the active link) and port 1 blocking (the backup link). (To view the configuration for port 1 and Trk1, see figure 73 on page 155.)

If the link provided by trunk 1 fails (on both ports), then port 1 begins forwarding in fast- uplink STP mode.

Ports 5, 6, and 12 are connected to end nodes and do not form redundant links.

CLI: Viewing and Configuring Fast-Uplink STP

Using the CLI to View Fast-Uplink STP. You can view fast-uplink STP using the same show commands that you would use for standard STP operation:

Syntax:

show spanning-tree

Lists STP status.

 

show spanning-tree config

Lists STP configuration for the switch and for individual

 

 

ports.

For example, figures 76 and 77 illustrate a possible topology, STP status listing, and STP configuration for a Series 2500 switch with:

STP enabled and the switch operating as an Edge switch

Port 1 and trunk 1 (Trk1) configured for fast-uplink STP operation

Several other ports connected to PC or workstation end nodes

 

 

STP

 

 

 

 

 

 

HP 2512

 

Block

 

Interior

 

STP Root

 

 

 

 

 

Operating

 

 

 

 

Switch with

 

Device

 

 

 

 

 

 

 

 

 

as an Edge

 

 

 

 

STP Enabled

 

 

 

LAN

Switch

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Port

Trunk

Figure 76. Example Topology for the Listing Shown in Figure 77

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