Abstract. Avaya Solution & Interoperability Test Lab

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1 Avaya Solution & Interoperability Test Lab Providing High Availability for VoIP in Switched LAN Environments using the Port Redundancy Feature on the Avaya P580 Gigabit Ethernet Switch - Issue 1.0 Abstract These Application Notes demonstrate a sample Port Redundancy configuration using an Avaya P580 Gigabit Ethernet switch to provide high availability for IP Telephony. The configuration emphasizes the use of Port Redundancy for the purposes of providing reduced cost backup links for all switch-to-switch primary links. The feature is designed as an alternative to using Spanning Tree and has a fail-over time of five seconds or less. 1 of 10

2 1. Introduction The Port Redundancy feature is available in Version 6.0 for the Avaya P580 and P882 Gigabit Ethernet Switches. In each Port Redundancy pair, a primary and a secondary port are defined. See Figure 1. When the link fails on the primary port, the secondary port becomes active and begins forwarding again within five seconds. This feature is suited for use in networking environments supporting applications that require high availability such as IP Telephony. The sample configuration in these Application Notes demonstrates how the Port Redundancy feature can be used to provide high availability for Avaya Media Servers and Media Gateways such as the Avaya S8300 Media Server and Avaya G700 Media Gateway. In the configuration each high speed (primary) Gigabit Ethernet link is backed by a low speed, reduced cost (secondary) Fast Ethernet link in the event that one or more primaries fail. The secondary port does not provide load sharing. These Application Notes only discuss the configuration aspects related to Port Redundancy on the Avaya P580 Gigabit Ethernet switch. Concepts such as Power over Ethernet (PoE), Quality of Service (QoS) and dial plan administration are beyond the scope of this document. Avaya(TM) S8300 Server with a G700 Gateway and X330GT2 Gigabit Ethernet Expansion Sub-Module Avaya(TM) P333T-PWR L2 Power over Ethernet Stackable Switch with a X330GT2 Gigabit Ethernet Expansion Sub-Module 1/24 1/51 1/ /51 1/1.105 Avaya(TM) 4620 IP Telephone x44007 "TeamB" Primary 4/3.1 "BlackJack" Primary 4/2 VoIP Engine (voip0) S8300 Media Server-.102 Media Gateway Processor-.101 P330 Stack Processor-.100 "TeamB" Secondary 3/12 Avaya(TM) P580 Gigabit Ethernet Switch "BlackJack" Secondary 3/2 5/2 3/ /24 VLAN 10 "GetShorty" Primary "GetShorty" Secondary Avaya(TM) P333T-PWR L2 Power over Ethernet Stackable Switch with an X330G2 GBIC Expansion SUb-Module 1/51 1/ BaseT 1000BaseSX 100BaseTX Avaya(TM) 4620 IP Telephone x /1 Figure 1: Sample Port Redundancy Configuration 2 of 10

3 Note: The capabilities described within this Application Notes may be generalized for configurations with the Avaya P882 Gigabit Ethernet Switch. Note: Version 6.0 is only supported for use on Avaya M8000R-SUP supervisor modules equipped with 256 MB of RAM. The M8000R-SUP supervisor module is responsible for learning addresses and managing the address cache, as well as protocol management and switch management for the P580 and P882 switches. 2. Equipment and Software Validated The following equipment and software were used for the sample configuration provided: Quantity Equipment Software 1 Avaya P580 Gigabit Ethernet Switch 1 M8000R-SUP module Version 6.0 Gigabit Ethernet switch software 1 M8024R-100TX module 1 M8008R-GB module 1 M8008R-1000T module 2 Avaya P333T-PWR Stackable Power over Ethernet Version (PoE) Layer 2 Switches 1 X330G2 GBIC Expansion Sub-Module 1 X330GT2 Gigabit Ethernet Expansion Sub-Module 1 Avaya S8300 Media Server with an Avaya G700 CM 1.3 Media Gateway 1 X330GT2 Gigabit Ethernet Expansion Sub-Module 2 Avaya 4620 IP Telephones R P580 Configuration The following sections outline the steps required to provision Port Redundancy for the sample configuration provided in Figure Create all Required VLANs To create a VLAN, navigate to MultiService Switch L2 Switching VLANs Configuration CREATE. The Create VLAN window opens (Figure 2). Enter a unique name and ID for the new VLAN to be created (e.g. Name=vlan10, ID=10) in the highlighted fields and click APPLY. 3 of 10

4 Figure 2: Create VLAN Window Note: This can alternately be accomplished via the Command Line Interface (CLI) via the following command structure: Syntax: set vlan <vlan-id> name <vlan-name> Sample: <configure># set vlan 10 name vlan Configure Switch-to-Switch Trunk Ports Select Cajun Router Modules & Ports Configuration from the Web Agent. The Module Information window opens. Select the switch ports for a module containing ports to be modified under the Switch Ports column (e.g. click on 24 for the 24 port Fast Ethernet module). The Switch Ports window opens. Select Port 3.2 for port 3/2 under the Name column. The Switch Port Configuration for Port 3.2 window opens (Figure 3). From the Port VLAN drop-down menu select the vlan10. From the Trunk Mode drop-down menu select IEEE 802.1Q. From the Auto Flush on Link Down drop-down menu select Enable and click APPLY. Repeat these steps for ports 3/12, 3/24, 4/2, 4/3 and 5/2. Note: It is recommended that Auto Flush be enabled on all P580 switch ports that are participating in a Port Redundancy pair. This indicates that the port is to mark all entries learned on that port as invalid if the link to the port fails. Note: All ports are 802.1Q tagged trunks in the sample configuration despite the use of a single VLAN. The assumption is that a dedicated data VLAN may be added to the configuration at a later time. Using trunks prepares the network for additional VLAN segmentation and Quality of Service via 802.1p priority. 4 of 10

5 Figure 3: Switch Port Configuration Window 5 of 10

6 Note: This can alternately be accomplished via the Command Line Interface (CLI) for all ports required via the following command structure: Syntax: set port vlan {<mod-num> <mod-swport-range>}[,{<mod-num> <mod-swportrange>}] <vlan-id> Sample: <configure># set port vlan 3/2,3/12,3/24,4/2,4/3,5/2 10 Syntax: set port trunking-format {<mod-num> <mod-swport-range>}[,{<modnum> <mod-swport-range>}]{clear ieee-802.1q multi-layer 3com} Sample: <configure># set port trunking-format 3/2,3/12,3/24,4/2,4/3,5/2 ieee Q Syntax: set port auto-flush <module-number> <mod-swport-range> {enable disable} Sample: <configure># set port auto-flush 3/2 Repeat for ports 3/12, 3/24, 4/2, 4/3 and 5/ Disable Spanning Tree To disable Spanning Tree, navigate to MultiService Switch L2 Switching Spanning Tree. The Spanning Tree Information window opens (Figure 4). Select Disable from the Configuration drop-down menu and click APPLY. Note: The Port Redundancy and Spanning Tree Protocol features are mutually exclusive. In order to enable Port Redundancy the Spanning Tree Protocol feature must be disabled globally. Figure 4: Spanning Tree Information Window Note: This can alternately be accomplished via the Command Line Interface (CLI) via the following command structure: Syntax: set spantree config {ieee per-vlan dual-layer disable} Sample: <configure># set spantree config disable 6 of 10

7 3.4. Enable Port Redundancy To enable Port Redundancy navigate to MultiService Switch L2 Switching Port Redundancy. The Port Redundancy Configuration window opens (Figure 5). Select Enable from the Configuration drop-down menu and click APPLY. Figure 5: Port Redundancy Configuration Window Note: This can alternately be accomplished via the Command Line Interface (CLI) via the following command structure: Syntax: set port-redundancy {enable disable} Sample: <configure># set port-redundancy enable 3.5. Create s The primary and secondary ports can be on different types of modules. For example, the primary port can be 10/100 Ethernet and the secondary port can be Gigabit Ethernet. Redundancy for ATM ports is not supported. From the Port Redundancy window (Figure 6) click CREATE. Figure 6: Port Redundancy Configuration Window 7 of 10

8 The Create window opens (Figure 7). Enter a unique name for the pair (e.g. Name=BlackJack). Select the Primary Port and Secondary Port from the respective drop-down menus (e.g. 4.2 and 3.2). Click APPLY. Figure 7: Create Window Click CREATE to make another pair. The Create window opens again. Enter a unique name for the pair (e.g. Name=GetShorty). Select the Primary Port and Secondary Port from the respective drop-down menus (e.g. 5.2 and 3.24). Click APPLY. Click CREATE to make another pair. The Create window opens again. Enter a unique name for the pair (e.g. Name=TeamB). Select the Primary Port and Secondary Port from the respective drop-down menus (e.g. 4.3 and 3.12). Click APPLY. Note: This can alternately be accomplished via the Command Line Interface (CLI) via the following command structure: Syntax: set port-redundancy name <redundant-name> {<primary-port>} {<secondaryport<} Sample: <configure># set port-redundancy name BlackJack 4/2 3/2 <configure># set port-redundancy name GetShorty 5/2 3/24 <configure># set port-redundancy name TeamB 4/3 3/12 8 of 10

9 4. Verification Steps With all primary and secondary ports connected verify that ports 3/2 and 3/24 LEDs blink continuously indicating that they are inactive secondary ports. Place a test call between x44007 and x44008 and disconnect the primary link of the BlackJack pair. Verify that audio path is reconnected within 5 seconds. Place a test call between x44007 and x44008 and disconnect the primary link of the GetShorty pair. Verify that audio path is reconnected within 5 seconds. Disconnect the primary link of the TeamB pair. Verify that all IP Stations maintain communication with the server. If one or more stations go down because the maximum number of keepalive messages has expired verify that all failing station(s) are able to reregister with the server again automatically. 5. Conclusion Connectivity between all Avaya Switches using the Port Redundancy feature was demonstrated in these Application Notes. The procedures described can be generalized to most configurations. Support for Port Redundancy in a switched/converged LAN environment was covered. 6. Additional References The following reference documents can be obtained online at Avaya P580 and P882 Gigabit Ethernet Switch User Guide Command Reference Guide for the Avaya P580, P882 Gigabit Ethernet Switch Avaya P333T-PWR Stackable L2 Power over Ethernet (PoE) Switch User Guide 9 of 10

10 Avaya and the Avaya Logo are trademarks of Avaya Inc. All trademarks identified by and are registered trademarks or trademarks, respectively, of Avaya Inc. All other trademarks are the property of their respective owners. The information provided in these Application Notes is subject to change without notice. The configurations, technical data, and recommendations provided in these Application Notes are believed to be accurate and dependable, but are presented without express or implied warranty. Users are responsible for their application of any products specified in these Application Notes. Please any questions or comments pertaining to these Application Notes along with the full title name and filename, located in the lower right corner, directly to the Avaya Solution & Interoperability Test Lab at 10 of 10