HP 5120-24G EI Configuration Manual

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HP 5120 EI Switch Series
IRF
Part number: 5998-1789b
Software version: Release 2220
Document version: 6W100-20130810

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   Summary of Contents for HP 5120-24G EI

  • Page 1: Configuration Guide

    HP 5120 EI Switch Series Configuration Guide Part number: 5998-1789b Software version: Release 2220 Document version: 6W100-20130810...

  • Page 2

    The only warranties for HP products and services are set forth in the express warranty statements accompanying such products and services. Nothing herein should be construed as constituting an additional warranty.

  • Page 3: Table Of Contents

    Contents IRF overview ································································································································································· 1   Hardware compatibility ···················································································································································· 1   IRF benefits ········································································································································································· 1   Application scenario ························································································································································· 2   Basic concepts ··································································································································································· 2   IRF member roles ······················································································································································ 2   IRF member ID ··························································································································································· 2   IRF port ······································································································································································ 2  ...

  • Page 4: Table Of Contents

    LACP MAD-enabled IRF configuration example ································································································· 27   ARP MAD-enabled IRF configuration example ··································································································· 29   Support and other resources ····································································································································· 32   Contacting HP ································································································································································ 32   Subscription service ·············································································································································· 32   Related information ························································································································································ 32   Documents ······························································································································································ 32  ...

  • Page 5: Irf Overview

    This book describes IRF concepts and guides you through the IRF setup procedure. Hardware compatibility In the HP 5120 EI Switch Series, only the following switch models can form an IRF fabric, and they must have expansion interface cards listed in "IRF physical port restrictions and cabling...

  • Page 6: Application Scenario

    Application scenario Figure 1 shows an IRF fabric that is formed by two switches, which appear as a single node to the upper and lower layer devices. Figure 1 IRF application scenario IP network IP network Subordinate Master Equal to IRF link Basic concepts This section describes the basic concepts that you might encounter when working with IRF.

  • Page 7: Physical Irf Port

    member ID of the switch. The two IRF ports are referred to as "IRF-port 1" and "IRF-port 2" in this book for simplicity. To use an IRF port, you must bind at least one physical port to it. The physical ports assigned to an IRF port automatically form an aggregate IRF link.

  • Page 8: Irf Split

    Figure 2 A network that comprises two IRF domains IRF split IRF split occurs when an IRF fabric breaks up into two or more IRF fabrics because of IRF link failures, as shown in Figure 3. The split IRF fabrics operate with the same IP address and cause routing and forwarding problems on the network.

  • Page 9: Member Priority

    Figure 4 IRF merge Member priority Member priority determines the possibility of a member device to be elected the master. A member with higher priority is more likely to be elected the master. The default member priority is 1. You can change the member priority of a member device to affect the master election result.

  • Page 10: Configuration Synchronization Mechanism

    %Created dir flash:/test. <Master> dir Directory of flash:/ -rw- 10105088 Apr 26 2000 13:44:57 test.app -rw- 2445 Apr 26 2000 15:18:19 config.cfg drw- Jul 14 2008 15:20:35 test 30861 KB total (20961 KB free) To create and access the test folder under the root directory of the Flash on member switch 3: <Master>...

  • Page 11: Loop-elimination Mechanism

    For more information about configuration management, see Fundamentals Configuration Guide. Loop-elimination mechanism IRF has its own mechanism to eliminate loops, though loop control protocols such as the spanning tree feature cannot be configured on IRF physical interfaces. Before an IRF member device forwards a packet, it identifies whether loops exist on the forwarding path based on the source and destination physical interfaces and the IRF topology.

  • Page 12: Lacp Mad

    Figure 5. In addition, the intermediate device must be an HP device that supports extended LACP for MAD. The IRF member switches send extended LACPDUs with TLVs that convey the domain ID and the active ID of the IRF fabric. The intermediate device transparently forwards the extended LACPDUs received from...

  • Page 13

    Figure 5 LACP MAD application scenario ARP MAD ARP MAD detects multi-active collisions by using extended gratuitous ARP packets that convey the IRF domain ID and the active ID. You can set up ARP MAD links between neighbor IRF member devices, or between each IRF member device and an intermediate device (see Figure 6).

  • Page 14

    Figure 6 ARP MAD application scenario Each IRF member compares the domain ID and the active ID in incoming extended gratuitous ARP packets with its domain ID and active ID: • If the domain IDs are different, the extended gratuitous ARP packet is from a different IRF fabric, and the device does not continue to process the packet with the MAD mechanism.

  • Page 15: Configuring Irf

    Guide. The SFP+ modules and SFP+ cables available for the switch are subject to change over time. For the most up-to-date list of SFP+ modules and cables, contact HP technical support or marketing staff. IRF port binding restrictions Facing the rear panel, make sure the physical ports bound to IRF port 1 is on the left of the physical ports bound to IRF port 2.

  • Page 16: Fips Mode Requirement

    After the IRF fabric is set up, you can access the IRF fabric to manage its member switches as if they were one switch. Figure 7 Basic IRF setup flow chart HP recommends the following IRF fabric setup and configuration procedure:...

  • Page 17: Planning The Irf Fabric Setup

    Configuring the global load sharing mode Optional. Configuring a port-specific load sharing mode 10. Configuring IRF bridge MAC persistence Optional. Optional. HP recommends enabling 11. Enabling software auto-update for system software image software auto-update to make sure synchronization system software image synchronization 12.

  • Page 18: Assigning A Member Id To Each Irf Member Switch

    IRF fabric size • Master switch • • IRF physical ports Member ID and priority assignment scheme • Fabric topology and cabling scheme • For more information about hardware and cabling, see the switch installation guide. Assigning a member ID to each IRF member switch CAUTION: In an IRF fabric, changing IRF member IDs might cause undesirable configuration changes and even data loss.

  • Page 19: Connecting Physical Irf Ports

    To specify a priority for the switch: Step Command Remarks Enter system view. system-view Specify a priority for the The default IRF member priority irf member member-id priority priority switch. is 1. Connecting physical IRF ports When you connect two neighboring IRF members, connect the physical ports of IRF-port 1 on one member to the physical ports of IRF-port 2 on the other, as shown in Figure IMPORTANT:...

  • Page 20: Binding Physical Ports To Irf Ports

    Binding physical ports to IRF ports To establish an IRF connection between two devices, you must bind at least one physical port to IRF-port 1 on one device and to IRF-port 2 on the other. For link redundancy and load sharing, bind multiple physical ports to one IRF port.

  • Page 21: Accessing The Irf Fabric

    Step Command Remarks • Enter interface range view: Method 1: interface range { interface-type interface-number [ to interface-type interface-number ] } &<1-5> Method 2: Enter Ethernet interface view interface range name or interface range view. name [ interface { interface-type interface-number [ to interface-type interface-number ] }...

  • Page 22: Accessing The Cli Of A Subordinate Switch

    Remote login—Remotely log in at a Layer 3 interface on any member switch by using a methods • including Telnet, Web, and SNMP. For more information, see the chapter on login in Fundamentals Configuration Guide. Accessing the CLI of a subordinate switch You can log in to the CLI of a subordinate switch for maintenance or debugging.

  • Page 23: Configuring Irf Link Load Sharing Mode

    Step Command Remarks Enter system view. system-view Configure the description of By default, no member switch irf member member-id description text a member. description is configured. Configuring IRF link load sharing mode On an IRF port that has multiple links, traffic is balanced across its physical links. You can configure the IRF port to distribute traffic based on certain criteria, including source IP address, destination IP address, source MAC address, destination MAC address, or any combination of the criteria.

  • Page 24: Configuring Irf Bridge Mac Persistence

    Configuring IRF bridge MAC persistence An IRF fabric by default uses the bridge MAC address of the master switch as its bridge MAC address. This bridge MAC address is used by Layer 2 protocols, for example, LACP, to identify the IRF fabric, and must be unique on a switched LAN for proper communication.

  • Page 25: Setting The Irf Link Down Report Delay

    The software auto-update function automatically propagates the system software image of the master to all members in the IRF fabric. If software auto-update is disabled, you must manually update the switch with the system software image of the master. When you add a switch to the IRF fabric, the software auto-update function compares the system software versions of the switch and the IRF master.

  • Page 26: Configuring Mad

    When you use LACP MAD, follow these guidelines: • The intermediate device must be an HP device that support extended LACP for MAD. If the intermediate device is in an IRF fabric, assign this fabric a different domain ID than the LACP •...

  • Page 27: Configuring Arp Mad

    Use dynamic link aggregation mode. MAD is LACP dependent. Even though LACP MAD can be • configured on both static and dynamic aggregate interfaces, it takes effect only on dynamic aggregate interfaces. Configure link aggregation settings also on the intermediate device. •...

  • Page 28: Excluding A Port From The Shutdown Action Upon Detection Of Multi-active Collision

    To configure ARP MAD: Step Command Remarks Enter system view. system-view Assign a domain ID to the IRF irf domain domain-id The default IRF domain ID is 0. fabric. Create a VLAN dedicated to The default VLAN on the device vlan vlan-id ARP MAD.

  • Page 29: Recovering An Irf Fabric

    CAUTION: Excluding a VLAN interface and its Layer 2 ports from the shutdown action introduces IP collision risks because the VLAN interface might be active on both the IRF fabric in Active state and the IRF fabric in Recovery state. By default, all ports except the console and physical IRF ports automatically shut down when the IRF fabric transits to the Recovery state.

  • Page 30: Displaying And Maintaining An Irf Fabric

    Figure 11 Active-state IRF fabric fails before the IRF link is recovered To manually recover an IRF fabric in Recovery state: Step Command Enter system view. system-view Change the state of the IRF fabric from mad restore Recovery to Active. After the IRF fabric is recovered, all ports that have been shut down by MAD automatically come up.

  • Page 31: Configuration Examples

    Set up a two-member IRF fabric at the access layer of the enterprise network in Figure 12. Configure LACP MAD in the IRF fabric, because the IRF fabric has a multi-chassis aggregate link to Device C, an HP device that supports extended LACP. Figure 12 Network diagram...

  • Page 32

    # Change the member ID of Device B to 2. <DeviceB> system-view [DeviceB] irf member 1 renumber 2 Warning: Renumbering the switch number may result in configuration change or loss. Continue? [Y/N]:y [DeviceB] Power off the devices, connect IRF links as shown in Figure 12, and power on the two devices.

  • Page 33: Arp Mad-enabled Irf Configuration Example

    [Current domain is: 0]: The assigned domain ID is: 0 Info: MAD LACP only enable on dynamic aggregation interface. # Assign ports GigabitEthernet 1/0/1 and GigabitEthernet 2/0/1 to the aggregate interface. [DeviceA] interface range gigabitethernet 1/0/1 gigabitethernet 2/0/1 [DeviceA-if-range] port link-aggregation group 2 [DeviceA-if-range] quit [DeviceA] interface gigabitethernet 2/0/1 [DeviceA-GigabitEthernet2/0/1] port link-aggregation group 2...

  • Page 34: Configuration Procedure

    Configuration procedure This example assumes that the system names of Device A, Device B and Device C are DeviceA, DeviceB, and DeviceC, respectively, before the IRF fabric is formed. Assign member IDs: # Keep the default member ID of Device A unchanged. # Change the member ID of Device B to 2.

  • Page 35

    # Enable the spanning tree feature globally on the IRF fabric to prevent loops. <DeviceA> system-view [DeviceA] stp enable # Connect the ARP MAD links as shown in Figure # Configure the IRF fabric to change its bridge MAC address as soon as the master leaves. [DeviceA] undo irf mac-address persistent # Create VLAN 3, and add port GigabitEthernet 1/0/1 (on Device A) and port GigabitEthernet 2/0/1 (on Device B) to VLAN 3.

  • Page 36: Support And Other Resources

    Related information Documents To find related documents, browse to the Manuals page of the HP Business Support Center website: http://www.hp.com/support/manuals • For related documentation, navigate to the Networking section, and select a networking category.

  • Page 37: Conventions

    Conventions This section describes the conventions used in this documentation set. Command conventions Convention Description Boldface Bold text represents commands and keywords that you enter literally as shown. Italic Italic text represents arguments that you replace with actual values. Square brackets enclose syntax choices (keywords or arguments) that are optional. Braces enclose a set of required syntax choices separated by vertical bars, from which { x | y | ...

  • Page 38

    Network topology icons Represents a generic network device, such as a router, switch, or firewall. Represents a routing-capable device, such as a router or Layer 3 switch. Represents a generic switch, such as a Layer 2 or Layer 3 switch, or a router that supports Layer 2 forwarding and other Layer 2 features.

  • Page 39: Index

    Master election,7 Configuring MAD,22 Connecting physical IRF ports,15 Planning the IRF fabric setup,13 Contacting HP,32 Conventions,33 Related information,32 Displaying and maintaining an IRF fabric,26 Setting the IRF link down report delay,21 Setup and configuration task list,12 Enabling software auto-update for system software...

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