Routing Configuration, Forwarding | Avaya P332G-ML manual

Chapter 12 Avaya P330 Layer 3 Features

Routing Configuration

Forwarding

The P330 forwards IP packets between IP networks. When it receives an IP packet through one of its interfaces, it forwards the packet through one of its interfaces. The P330 supports multinetting, enabling it to forward packets between IP subnets on the same VLAN as well as between different VLANs. Forwarding is performed through standard means in Router mode.

Multinetting (Multiple Subnets per VLAN)

In Router Mode, most applications such as RIP and OSPF, operate per IP interface. Other applications such as VRRP and DHCP/BOOTP Relay operate per VLAN. Configuration of these applications is done in the Interface mode. When there is only a single interface (subnet) per VLAN then system behavior is intuitive since a subnet and a VLAN are the same.

Multiple interfaces (subnets) per VLAN are more complicated. For example, if there are two interfaces over the same VLAN and you configure DHCP server on one interface, it will be used also for the second interface over the same VLAN. This behavior might be less expected and in some cases wrong.

In order to prevent misconfiguration and unexpected results, the P330 prevents configuration of VLAN-oriented commands on an interface unless explicitly requested by the user via the “enable vlan commands” CLI command.

Configuring the “enable vlan commands” on one interface defeats this option on other interfaces that belong to the same VLAN. This ensures that VLAN-oriented commands can be configured from one interface only.

In case there is only one interface over a VLAN, then VLAN oriented commands for this VLAN can be configured through the single interface without using the “enable vlan commands” command.

VLAN-oriented commands that were configured affect the VLAN of the interface that was used at the time the command was issued.

If the interface is moved to another VLAN (using the “ip vlan command”) VLAN oriented configuration still relates to the original VLAN.

Avaya P332G-ML User’s Guide

109

Image 125

Avaya P332G-ML manual Routing Configuration, Forwarding, Multinetting Multiple Subnets per Vlan

Contents

Avaya P332G-ML Avaya.com Contents Section Installation Radius Section Configuration Rmon LAG Dhcp BootpRIP2 Section Troubleshooting and Maintaining Table of Contents Viii Avaya P332G-ML User’s Guide Safety Information FCC Notice Before you Install the P332G-MLConventions Used in the Documentation CLI Conventions Warranty Avaya Support Avaya P332G-ML User’s Guide Overview Page Introduction Avaya P332G-ML OverviewAbout the P332G-ML Avaya P332G-ML Highlights Command Line Interface CLI Layer 3 Features P330-MLNetwork Management and Monitoring Device Manager Embedded Web Port Mirroring Fans, Power Supply, and BUPS-ML MonitoringAvaya Integrated Manager Avaya P332G-ML Overview Avaya P332G-ML User’s Guide Ietf Layer Standards and CompatibilityAvaya P330 Standards Supported Ietf Network Monitoring P332G-ML Switch SpecificationsPower Requirements Physical Safety AC Version SafetySafety DC Version EMC Emissions Interfaces Stacking Sub-moduleBasic Mtbf X330STK-ML Approved SFF/SFP Gbic Transceivers Safety InformationLaser Classification Class Luokan Klass Laser Product Laserlaite Laser Apparat Installing and Removing a SFF/SFP Gbic Transceiver InstallationSpecifications LX Transceiver ELX Gigabit Fiber Optic CablingAgency Approval TXD Console Pin AssignmentsRXD GND DTR RTS CTS Chapter Avaya P332G-ML User’s Guide Installation Page Site Preparation InstallationRequired Tools Power Requirements AC P332G-ML Rack Mounting Rack Mounting Optional To connect stacked switches Installing the X330STK-ML Stacking Sub-Module OptionalConnecting Stacked Switches Incorrect Stack Connection P330 Stack Connections Prerequisites Connecting Cables to Network EquipmentMaking Connections to Network Equipment 1000BASE-ELX Powering On Avaya P330 Switch DC Powering Up the Avaya P330Powering On Avaya P330 Module AC Post-Installation PWR Avaya P332G-ML Front and Rear PanelsAvaya P332G-ML Front Panel LNK LAG Avaya P332G-ML - Select buttons Avaya P332G-ML Back Panel BUPS-ML Input Connector Sticker BUPS-ML Input ConnectorPage Establishing a Serial Connection Configuring the Terminal Serial Port ParametersConnecting a Terminal to the Avaya P330 Serial port Assigning P330’s IP Stack Address P330 Sessions Establishing an SSH Connection Establishing a Telnet Connection Overview Connecting a Modem to the Console PortEstablishing a Modem PPP Connection with the P330 Entering the Supervisor Level Security Levels Entering the CLI Defining new local usersExiting the Supervisor Level Introduction to Snmp Snmp SupportSnmp Versions Managers and Agents SNMPv1 Manager/Agent Communication SNMPv3 SNMPv2c Groups Views Snmp Commands User Authentication User Authentication Introduction to SSH SSH Protocol Support SSHClientConnection SSH Commands SCP Protocol Support Introduction to Radius Radius Radius Authentication Procedure Radius Commands Introduction to Telnet Telnet CommandsTelnet Client Support Introduction Recovery PasswordRecovery Password Commands Allowed Managers Introduction Allowed Managers CLI CommandsAllowed Managers Allowed Protocols Introduction Allowed Protocols CLI CommandsAllowed Protocols User Authentication Configuration Page Avaya P330 Default Settings P330 Default SettingsConfiguring the Switch SSH SnmpHttp Basic Switch Configuration Switch Configuration Operating parameters System Parameter ConfigurationIdentifying the system UTC Uploading and Downloading Device Configurations and ImagesNetwork Time Acquiring Protocols Parameter Configuration Layer 2 Configuration File Tftp Layer 3 Configuration File Switch Configuration System Logging Messages System LoggingSystem Logging Introduction Applications Sinks Syslog Servers Syslog Configuration CLI Commands Monitoring CPU Utilization Switch Configuration Avaya P332G-ML User’s Guide Rmon Smon Avaya P330 Layer 2 FeaturesOverview Ethernet Configuring Ethernet ParametersFast Ethernet Gigabit Ethernet Priority SpeedFlow Control CAM Table MAC AddressMmmmmmssssss MM-MM-MM-SS-SS-SS Ethernet Configuration CLI Commands Ethernet Implementation in the Avaya P332G-ML Vlan Overview Vlan Configuration Multi Vlan Binding Sales Mktg EngineeringVlan Tagging Entries and all the ports’ IDs PVIDs present in the switch Ingress Vlan Security Vlan CLI CommandsAutomatic Vlan Learning Vlan Implementation in the Avaya P332G-ML Spanning Tree per Port Spanning Tree ProtocolSpanning Tree Protocol Port Roles Rapid Spanning Tree Protocol RstpAbout the 802.1w Standard Spanning Tree Implementation in the P330 Family Spanning Tree Protocol CLI Commands Avaya P330 Layer 2 Features MAC Aging Configuring the P330 for MAC Aging MAC Aging CLI Commands LAG Overview LAG CLI Commands LAG Implementation in the Avaya P330 Family of Products Port Redundancy Operation Port Redundancy Intermodule Port Redundancy Port Redundancy CLI Commands Avaya P330 Layer 2 Features IP Multicast Filtering IP Multicast Implementation in the Avaya P332G-ML IP Multicast CLI Commands Rmon Overview Rmon CLI Commands Avaya P330 Layer 2 Features Smon Overview Smon Port Mirroring CLI commands Port Mirroring ConfigurationPort Mirroring Overview Port Mirroring Constraints Weighted Queuing CLI Commands Weighted QueuingImplementation of Weighted Queuing in the P330-ML Port Classification Port Classification CLI Commands Implementation of Stack Health in the P330 Family Stack RedundancyStack Health Stack Health CLI Commands Avaya P330 Layer 2 Features 106 Avaya P332G-ML User’s Guide What is Routing? Avaya P330 Layer 3 Features Routing Multinetting Multiple Subnets per Vlan Routing ConfigurationForwarding IP Configuration CLI Commands IP Configuration Assigning Initial Router Parameters Obtaining and Activating a License Key Routerconfigure-ifinterface-name# prompt appears Obtaining a Routing License Key 114 Avaya P332G-ML User’s Guide Activating a Routing License Key License Key CLI Commands Avaya P330 Layer 3 Features 116 Avaya P332G-ML User’s Guide RIP Overview RIP Routing Interchange Protocol Configuration RIP2 RIP CLI Commands Avaya P332G-ML User’s Guide 119 Ospf Overview Ospf Open Shortest Path First Configuration Ospf CLI Commands Static Routing Overview Static Routing ConfigurationStatic Routing Configuration CLI Commands RIP Route Preferences Route Redistribution Route Redistribution Commands ARP Overview ARP Address Resolution Protocol Table Configuration ARP Table ARP CLI Commands DHCP/BOOTP Relay BOOTP/DHCP Overview BOOTP/DHCP CLI Commands NetBIOS Re-broadcast Configuration CLI Commands NetBIOS Re-broadcast ConfigurationNetBIOS Overview Vrrp Overview Vrrp Virtual Router Redundancy Protocol Configuration Case#1 Vrrp Configuration Example Case #2 Vrrp CLI Commands Avaya P332G-ML User’s Guide 133 Srrp Overview Srrp ConfigurationSrrp Configuration Example Srrp CLI Commands Policy Configuration CLI Commands Policy ConfigurationPolicy Configuration Overview Avaya P332G-ML User’s Guide 137 Avaya P330 Policy Policy Configuration Example P330-1super#ip access-list 100 2 fwd3 tcp any host IP Fragmentation/Reassembly CLI Commands IP Fragmentation and ReassemblyIP Fragmentation and Reassembly Overview Troubleshooting and Maintenance Page Troubleshooting the Installation Troubleshooting the InstallationPage Replacing the Stacking Sub-module Maintenance Chapter Maintenance 146 Avaya P332G-ML User’s Guide Obtain Software Online Downloading Software Updating the SoftwareSoftware Download Example Download New Version without Overwriting Existing Version