Alcatel-Lucent OmniSwitch 6860 Series

Contents
OmniSwitch AOS Release 8 Network Configuration Guide December 2017 vi
High Availability VLAN Overview ................................................................................5-4
High Availability VLAN Operational Mode ...........................................................5-4
Traffic Flows in High Availability VLAN ...............................................................5-5
Configuring High Availability VLANs on a Switch .......................................................5-6
Creating and Deleting VLANs .................................................................................5-6
Adding and Removing Server Cluster Ports ............................................................5-7
Assigning and Modifying Server Cluster Mode ......................................................5-7
Assigning and Removing MAC Addresses ..............................................................5-8
Application Examples .....................................................................................................5-9
Example 1: Layer 2 Server Cluster ..........................................................................5-9
Example 2: Layer 3 Server Cluster ........................................................................5-11
Example 3: Layer 3 Server Cluster with IP Multicast Address to
Cluster (IGMP) ......................................................................................................5-13
Displaying High Availability VLAN Status .................................................................5-16
Chapter 6 Configuring Spanning Tree Parameters .............................................................6-1
In This Chapter ................................................................................................................6-2
Spanning Tree Bridge Parameter Defaults .....................................................................6-3
Spanning Tree Port Parameter Defaults ..........................................................................6-3
Multiple Spanning Tree (MST) Region Defaults ............................................................6-4
Spanning Tree Overview .................................................................................................6-5
How the Spanning Tree Topology is Calculated .....................................................6-5
MST General Overview ................................................................................................6-12
How MSTP Works .................................................................................................6-12
Comparing MSTP with STP and RSTP .................................................................6-15
What is a Multiple Spanning Tree Instance (MSTI) ..............................................6-15
What is a Multiple Spanning Tree Region .............................................................6-16
What is the Common Spanning Tree .....................................................................6-17
What is the Internal Spanning Tree (IST) Instance ................................................6-17
What is the Common and Internal Spanning Tree Instance ...................................6-17
MST Configuration Overview ...............................................................................6-17
MST Interoperability and Migration ......................................................................6-18
Spanning Tree Operating Modes ..................................................................................6-20
Using Flat Spanning Tree Mode ............................................................................6-20
Using Per-VLAN Spanning Tree Mode .................................................................6-21
Using Per-VLAN Spanning Tree Mode with PVST+ ............................................6-22
OmniSwitch PVST+ Interoperability .....................................................................6-23
Using Spanning Tree Configuration Commands ..........................................................6-26
Configuring STP Bridge Parameters .............................................................................6-26
Selecting the Spantree Protocol ..............................................................................6-27
Configuring the Bridge Priority .............................................................................6-28
Configuring the Bridge Hello Time .......................................................................6-29
Configuring the Bridge Max-Age Time .................................................................6-29
Configuring the Forward Delay Time for the Switch ............................................6-30
Enabling/Disabling the VLAN BPDU Switching Status .......................................6-30