Contents
viii
Catalyst 6500 Series Switch Software Configuration Guide—Release 8.7
OL-8978-04
Disabling Global Support for 802.1Q Tunneling 8-5
Understanding How Layer 2 Protocol Tunneling Works 8-6
Layer 2 Protocol Tunneling Configuration Guidelines 8-7
Configuring Layer 2 Protocol Tunneling on the Switch 8-7
Specifying a Layer 2 Protocol 8-7
Configuring Layer 2 Protocol Tunneling on Trunk Ports 8-8
Layer 2 Protocol Tunneling on Trunks Example 8-9
Specifying Drop and Shutdown Thresholds on Layer 2 Protocol Tunneling Ports 8-10
Specifying CoS on Layer 2 Protocol Tunneling Ports 8-12
Clearing Layer 2 Protocol Tunneling Statistics 8-13
CHAPTER
9 Configuring Spanning-Tree PortFast, UplinkFast, BackboneFast, and Loop Guard 9-1
Understanding How PortFast Works 9-2
Understanding How PortFast BPDU Guard Works 9-2
Understanding How PortFast BPDU Filtering Works 9-3
Understanding How UplinkFast Works 9-3
Understanding How BackboneFast Works 9-4
Understanding How Loop Guard Works 9-6
Configuring PortFast on the Switch 9-8
Enabling PortFast on an Access Port 9-8
Enabling Spanning-Tree PortFast on a Trunk Port 9-9
Disabling PortFast 9-10
Resetting PortFast 9-11
Configuring PortFast BPDU Guard on the Switch 9-11
Enabling PortFast BPDU Guard 9-11
Disabling PortFast BPDU Guard 9-12
Configuring PortFast BPDU Filtering on the Switch 9-13
Enabling PortFast BPDU Filtering 9-14
Disabling PortFast BPDU Filtering 9-15
Configuring UplinkFast on the Switch 9-15
Enabling UplinkFast 9-16
Disabling UplinkFast 9-17
Configuring BackboneFast on the Switch 9-18
Enabling BackboneFast 9-18
Displaying BackboneFast Statistics 9-18
Disabling BackboneFast 9-19
Configuring Loop Guard on the Switch 9-19
Enabling Loop Guard 9-19
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