Specifications

Contents
viii
Cisco 7600 Series Router Cisco IOS Software Configuration Guide—12.1E
78-14064-04
Configuring EtherChannels 13-6
Configuring Port Channel Logical Interfaces for Layer 3 EtherChannels 13-7
Configuring Channel Groups 13-8
Configuring the LACP System Priority and System ID 13-10
Configuring EtherChannel Load Balancing 13-11
CHAPTER 14 Configuring IEEE 802.1Q Tunneling and Layer 2 Protocol Tunneling 14-1
Understanding How 802.1Q Tunneling Works 14-1
802.1Q Tunneling Configuration Guidelines and Restrictions 14-3
Restrictions 14-3
Guidelines 14-4
Configuring 802.1Q Tunneling 14-5
Preconfiguration Tasks 14-5
Configuring 802.1Q Tunnel Ports 14-6
Configuring the Cisco 7600 Series Router to Tag Native VLAN Traffic 14-6
Understanding How Layer 2 Protocol Tunneling Works 14-7
Configuring Support for Layer 2 Protocol Tunneling 14-8
CHAPTER 15 Configuring STP and IEEE 802.1s MST 15-1
Understanding How STP Works 15-2
STP Overview 15-2
Understanding the Bridge ID 15-3
Understanding Bridge Protocol Data Units 15-4
Election of the Root Bridge 15-4
STP Protocol Timers 15-5
Creating the Spanning Tree Topology 15-5
STP Port States 15-6
STP and IEEE 802.1Q Trunks 15-12
Understanding How IEEE 802.1w RSTP Works 15-13
IEEE 802.1w RSTP Overview 15-13
RSTP Port Roles 15-13
RSTP Port States 15-14
Rapid-PVST 15-14
Understanding How IEEE 802.1s MST Works 15-14
IEEE 802.1s MST Overview 15-15
MST-to-PVST Interoperability 15-16
Common Spanning Tree 15-18
MST Instances 15-18
MST Configuration Parameters 15-18