OS6860(E)_AOS_8.1.1.R01_Switch_Management_Guide

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Virtual Chassis Overview Configuring Virtual Chassis Virtual Chassis Overview Virtual Chassis is a group of chassis managed through a single management IP address. It provides both node level and link level redundancy for both layer 2 and layer 3 protocols and services. This section describes the main topics regarding Virtual Chassis such as benefits, components, mode of operation, configuration conversion, start up and redundancy. Some of the key benefits provided by a Virtual Chassis are: • A single, simplified configuration to maintain • Optimized bandwidth usage between the access layer and core • Provides predictable and consistent convergence with redundant links to the two chassis • Allows for exclusion of spanning-tree and other redundancy protocols like VRRP between the access layer and the core • A Virtual Chassis appears as single router or bridge with support for all protocols • A Virtual Chassis can be upgraded using ISSU to minimize network impact Ring Linear Back-to-Back Virtual Chassis Topologies Virtual Chassis Concepts and Components Virtual Chassis is an OmniSwitch feature that requires specific building blocks to provide full functionality. The following sections highlight the various components of a Virtual Chassis architecture. Virtual Chassis - The entity consisting of multiple physical chassis connected using the virtual-fabric links. Master Chassis - The Master chassis in a virtual chassis topology acting as the entry point for management and control operations. All configuration changes will be made on this chassis and communicated to the Slave chassis. The VC LED will be green. page 13-6 OmniSwitch AOS Release 8 Switch Management Guide May 2014
Configuring Virtual Chassis Virtual Chassis Overview Slave Chassis - Any chassis which is not the Master chassis is considered a Slave chassis. A Slave chassis is not directly configured, it communicates with the Master chassis through the virtual-fabric links to determine its configuration. The VC LED will be amber. Virtual Chassis EMP Address - The Virtual Chassis management IP address (EMP-VC). This is a configurable IP address that is automatically assigned to the current primary chassis management module (CMM) of the master chassis. This parameter is stored in the vcboot.cfg configuration file. Chassis EMP Address - The local chassis management IP address (EMP-CHAS1). This is a configurable IP address that is automatically assigned to the primary chassis management module (CMM) of the local chassis regardless of its master or slave role. This parameter is stored in the chassis specific vcsetup.cfg configuration file. Virtual Fabric Link (VFL) - Dedicated ports that connect the chassis participating in the Virtual Chassis. As one of the basic building blocks of a Virtual Chassis configuration, the VFL facilitates the flow of traffic and the transfer of control data between the Master and Slave chassis. Control VLAN - A special type of VLAN reserved for the inter-chassis communication exchange between the switches participating in a Virtual Chassis. Only VFL ports are assigned to this VLAN, and no other ports are allowed to join the Control VLAN. IS-IS VC - Proprietary protocol for managing a Virtual Chassis topology. This protocol has no interaction with IS-IS routing or IS-IS SPB protocols. Responsible for information exchange with peers over the VFL, determining adjacencies, loop-detection and the shortest path between members of the VC. VCSP - Virtual Chassis Split Protection. A proprietary protocol used by VC to detect and protect against network disruption when a VC splits. vcsetup.cfg - A file containing information pertaining to the current physical switches, helping incorporate it into a virtual chassis. This file contains information such as Chassis ID, Group ID, Chassis priority, control VLAN, and chassis EMP IP addresses. vcboot.cfg - A file containing information pertaining to the virtual chassis as a whole including L2 and L3 configuration, management configuration, user ports configuration, etc. Virtual Chassis - Boot-Up The Master chassis contains the vcboot.cfg file that contains the configuration for the entire virtual chassis. All the switches (i.e. the one that will eventually become the Master and the ones that will become Slaves) contain a vcsetup.cfg file that allows them to establish an connection over a VFL to all the other neighboring chassis. 1 Upon boot-up, a switch will read its local vcsetup.cfg file and attempt to connect to the other neighbor switches. 2 Upon connection, the switches will exchange the parameters configured in their local vcsetup.cfg files. 3 As a result of this exchange, they will discover the topology, elect a Master based on criteria described in the next section, start periodic health checks over the VFL and synchronize their configuration as defined within the vcboot.cfg configuration file. 4 All Slaves, if they do not have a local copy of vcboot.cfg, or their local copy does not match the copy found on the Master, will download their complete vcboot.cfg from the Master chassis and reboot using this copy of vcboot.cfg as its configuration file. OmniSwitch AOS Release 8 Switch Management Guide May 2014 page 13-7
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Part No. 060391-10, Rev. A May 2014
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Contents About This Guide .........
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Contents Using the Switch as an FTP
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Contents Account and Password Polic
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Contents Authentication Trap ......
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Contents Firmware Upgrade Files ...
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About This Guide This OmniSwitch AO
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About This Guide Documentation Road
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About This Guide Related Documentat
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1 Logging Into the Switch Logging i
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Logging Into the Switch Quick Steps
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Logging Into the Switch Accessing t
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Logging Into the Switch Setting the
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Logging Into the Switch Using Secur
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Logging Into the Switch Modifying t
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Logging Into the Switch Enabling th
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Logging Into the Switch Enabling th
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2 Managing System Files This chapte
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Managing System Files Switch Admini
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Managing System Files File and Dire
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Managing System Files Loading Softw
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Managing System Files Loading Softw
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Managing System Files Setting the S
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3 Managing CMM Directory Content Th
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Managing CMM Directory Content CMM
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Managing CMM Directory Content Mana
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4 Using the CLI Alcatel-Lucent’s
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Using the CLI Command Entry Rules a
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Using the CLI Command Help -> sh vl
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Using the CLI Logging CLI Commands
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Using the CLI Customizing the Scree
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5 Working With Configuration Files
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6 Managing Switch User Accounts Swi
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Managing Switch User Accounts User
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7 Managing Switch Security Switch s
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Managing Switch Security Switch Sec
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Managing Switch Security Authentica
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Managing Switch Security Quick Step
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Managing Switch Security Setting Up
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Managing Switch Security Configurin
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8 Using WebView The switch can be m
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Using WebView WebView CLI Commands
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Using WebView WebView Overview Conf
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9 Using SNMP The Simple Network Man
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Using SNMP Quick Steps for Setting
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Using SNMP Quick Steps for Setting
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Using SNMP SNMP Overview Using SNMP
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Using SNMP Using SNMP For Switch Se
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Using SNMP Using SNMP For Switch Se
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Using SNMP Working with SNMP Traps
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Using SNMP Verifying the SNMP Confi
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10 Web Services, CLI Scripting, and
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Page 243 and 244: A Software License and Copyright St
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Index Symbols !! command 4-6 A aaa
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Index Network Time Protocol see NTP
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OS6860(E)_AOS_8.1.1.R01_Switch_Management_Guide

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