Troubleshooting tools, Port Mirroring | HP 445946-001 instruction

Troubleshooting tools

Troubleshooting tools

Introduction

This appendix discusses some tools to help you use the Port Mirroring feature to troubleshoot common network problems on the switch.

Port Mirroring

The Port Mirroring feature on the switch is very useful for troubleshooting any connection-oriented problem. Any traffic in or out of one or more ports can be mirrored to a single monitoring port to which a network monitor can be attached.

Port Mirroring can be used as a troubleshooting tool or to enhance the security of your network. For example, an Intrusion Detection Service (IDS) server can be connected to the monitor port to detect intruders attacking the network.

As shown in the following figure, port 18 is monitoring ingress traffic (traffic entering the switch) on port 21 and egress traffic (traffic leaving the switch) on port 1. You can attach a device to port 18 to monitor the traffic on ports 21 and 1.

Figure 28 Port Mirroring

This figure shows two mirrored ports monitored by a single port. Similarly, you can have one mirrored port to one monitored port, or many mirrored ports to one monitored port. The switch does not support a single port being monitored by multiple ports because it supports only one monitored port configured at a time.

191

Image 191

HP 445946-001 manual Troubleshooting tools, Port Mirroring

Contents

Part number First edition June HP 10Gb Ethernet BL-c Switch Legal notices Contents 802.1x port states Configuring Lacp802.1x authentication process Configuring port-based traffic control Edge port Link type Configuration guidelinesBridge priority Port priority Port path cost Adding a Vlan to a Spanning Tree Group Creating a Vlan 109 100105 106 155 131Internal versus external routing 134 141 175 Configuring the switch for tracking 177167 173 Introduction Accessing the switchAccessing the switch Management Network Typeface or Meaning Example SymbolAdditional references Typographical conventions Connecting through Secure Shell Connecting through the console portConnecting through Telnet Configuring an IP interface Using the command line interfaces Apply, verify, and save the configuration Using the Browser-based Interface Snmp Using Simple Network Management ProtocolDefault configuration For more details, see Configuring Snmp trap hosts Cfg/sys/ssnmp/snmpv3/usm x/auth md5sha User configuration CLI user equivalent View based configurations SNMPv1 trap host Configuring Snmp trap hostsConfigure a user with no authentication or password CLI oper equivalent Sys/ssnmp/snmpv3/tparam x/uname Accessing the switch Configure an entry in the notify table SNMPv3 trap host configuration SNMPv2 trap host configuration Setting allowable source IP address ranges Secure access to the switch How Radius authentication works Radius authentication and authorizationConfiguring an IP address range for the management network Apply and save the configuration Configuring Radius on the switch CLI example Click Submit Configuring Radius on the switch BBI example Description and tasks performed Radius authentication featuresUser accounts for Radius users User account Radius attributes for user privileges TACACS+ authenticationAccessing the switch User access levels User name/access User service type Value User access level TACACS+ level How TACACS+ authentication worksTACACS+ authentication features Authorization Accounting Configure custom privilege-level mapping optional Configure the TACACS+ secret and second secret Configuring TACACS+ authentication on the switch BBI example Secure Shell and Secure Copy Enabling or disabling SSH Configuring SSH and SCP features CLI example For example Using SSH and SCP client commandsEnter the following command to log in to the switch Switch prompts you for the scpadmin password SSH and SCP encryption of management messages Generating RSA host and server keys for SSH access User account Description Password User access controlSSH/SCP integration with Radius and TACACS+ authentication Enable the user ID Setting up user IDsDefine the user name and password Port number Port alias Ports on the switchPorts and trunking Ports and trunking Port trunk groups Before you configure trunksBuilt-in fault tolerance Ports and trunking Ethernet switch port names Cfg/port x/cur Trunk group configuration rules Port trunking example On Switch 2, configure trunk groups 4 Configuring trunk groups CLI exampleOn Switch 1, configure trunk groups 5 Configuring trunk groups BBI example Click Submit Page Link Aggregation Control Protocol Configurable Trunk Hash algorithmActor Switch Partner Switch Page Save your new configuration changes Configuring LacpDefine the admin key on port Apply and verify the configuration Port-based Network Access and traffic control Port-based Network Access and traffic controlPort-based Network Access control Extensible authentication protocol over LAN EAPoL Message Exchange 802.1x authentication process 802.1x port states Attribute Attribute Value Supported Radius attributes Port-based traffic control EAPoL configuration guidelines Configuring port-based traffic control Vlan numbers VLANsOverview VLANs and port Vlan ID numbers Viewing VLANs Viewing and configuring PVIDsPort configuration Pvid numbers Vlan tagging VLANs VLANs Vlan topologies and design considerations VLANs and IP interfaces Vlan configuration rules Component Description Multiple Vlans with tagging VLANs Multiple VLANs with tagging Configuring the example networkConfiguring ports and VLANs on Switch 1 CLI example # add Add port 18 to Vlan Current Ports for Configuring ports and VLANs on Switch 2 CLI example Configuring ports and VLANs on Switch 1 BBI example VLANs Enable the port and enable Vlan tagging Cfg/l2/fdb/static FDB static entries Trunking support for FDB static entries Configuring a static FDB entry Spanning Tree Protocol Spanning Tree ProtocolBridge Protocol Data Units Determining the path for forwarding BPDUs Spanning Tree Group configuration guidelinesDefault Spanning Tree configuration Adding and removing ports from STGs Adding a Vlan to a Spanning Tree GroupCreating a Vlan Rules for Vlan tagged ports Assigning cost to ports and trunk groups Why do we need Multiple Spanning Trees?Switch element Belongs to Multiple Spanning Trees Two VLANs on separate instances of Spanning Tree Protocol Vlan participation in Spanning Tree Groups Configuring Switch 2 CLI example Configuring Multiple Spanning Tree GroupsConfiguring Switch 1 CLI example Configuring Switch 1 BBI example Page Port Fast Forwarding Configuring Port Fast ForwardingConfiguration guidelines Configuring Fast Uplink Convergence Rstp and Mstp Rstp and MstpRapid Spanning Tree Protocol Port state changes Port type and link type Rstp configuration guidelinesRstp configuration example Configuring Rapid Spanning Tree Protocol BBI example Common Internal Spanning Tree Rstp and Mstp Apply, verify, and save the configurationMultiple Spanning Tree Protocol Mstp region Assign VLANs to Spanning Tree Groups Mstp configuration guidelinesMstp configuration example Configuring Multiple Spanning Tree Protocol CLI example Configuring Multiple Spanning Tree Protocol BBI example Click Submit Page Apply, verify, and save the configuration Quality of Service Quality of Service Number Protocol Name Using ACL filtersSummary of packet classifiers Well-krown TCP flag values Quality of Service Well-known protocol typesNumber Application Precedence Group ACLs Precedence Level Summary of ACL actionsUnderstanding ACL precedence Using ACL Groups Re-marking ACL Metering and Re-markingViewing ACL statistics Metering Configure Access Control Lists CLI example ACL configuration examples Configure Access Control Lists and Groups BBI example Click Submit Page Quality of Service Add the ACL to the port Drop Precedence Class Using Dscp values to provide QoSDifferentiated Services concepts Per Hop Behavior Class selector priority classes Using 802.1p priorities to provide QoSService Level Default PHB 802.1p Priority QoS levelsPage Configure a port’s default 802.1 priority 802.1p configuration CLI example802.1p configuration BBI example Quality of Service Select a port 101 102 Quality of Service Set the 802.1p priority value 103 Page Queuing and scheduling Basic IP routing Basic IP routingIP routing benefits Routing between IP subnetsPage Page Interface Devices IP Interface Address Example of subnet routingSubnet Devices IP Addresses Add the switch ports to their respective VLANs 110 Using VLANs to segregate broadcast domainsEnable, apply, and verify the configuration Devices IP Interface Switch Port 111 Dhcp relay agent Dynamic Host Configuration Protocol Dhcp relay agent configuration Stability Routing updatesRouting Information Protocol Distance vector protocol RIPv2 RIPv2 in RIPv1 compatibility modeRIP Features RIPv1 Metric DefaultAuthentication Multicast Cfg/l3/frwd/on before you turn RIP on RIP configuration exampleAdd VLANs for routing interfaces Add IP interfaces to VLANs Igmp Snooping Igmp Snooping FastLeave IGMPv3 Igmp Filtering Configuring the rangeConfiguring the action Static multicast router Igmp Snooping configuration exampleConfiguring Igmp Snooping CLI example Enable IGMPv3 Snooping optional Define an Igmp Filter Configuring Igmp Filtering CLI exampleConfiguring a Static Mrouter CLI example Enable Igmp Filtering on the switch Configuring Igmp Snooping BBI example Apply, verify, and save the configuration 124 Igmp Snooping Enable Igmp Snooping Configuring Igmp Filtering BBI example 126 Igmp Snooping Define the Igmp FilterSelect Layer 3 Igmp Igmp Filters Add Filter Page Apply, verify, and save the configuration 128 Configure Static Mrouter Click the Configure context button Configuring a Static Multicast Router BBI example Apply, verify, and save the configuration Igmp Snooping 130 Types of Ospf areas Ospf overview Ospf area types Types of Ospf routing devices Shortest Path First Tree Neighbors and adjacenciesLink-State Database Internal versus external routing Ospf implementation in HP 10GbE switch softwareConfigurable parameters Area index set to an arbitrary value Defining areasAssigning the area index Attaching an area to a network Using the area ID to assign the Ospf area numberInterface cost Summarizing routes Default routesElecting the designated router and backup Router ID Virtual links Enable Ospf authentication for Area 2 on switch Assign MD5 key ID to Ospf virtual link on switches 2 Configure MD5 key ID for Area 0 on switches 1, 2,Assign MD5 key ID to Ospf interfaces on switches 1, 2, Enable Ospf MD5 authentication for Area 2 on switch Example 1 Simple Ospf domain CLI example Ospf configuration examplesOspf features not supported in this release Example 1 Simple Ospf domain BBI example Apply, verify, and save the configuration 143 Ospf Click Submit 146 Configure the Ospf areaClick Submit Select Add Ospf Area Ospf 148 Click Submit Select Add Ospf Interface Apply, verify, and save the configuration 149 Define the backbone Configuring Ospf for a virtual link on Switch aExample 2 Virtual links Attach the network interface to the transit area Configuring Ospf for a virtual link on Switch BConfigure the virtual link Switch B in step Define the transit area Example 3 Summarizing routesOther Virtual Link Options 153 Verifying Ospf configuration Remote monitoring Remote monitoringRmon group 1-statistics View Rmon statistics for the port Configuring Rmon Statistics CLI exampleConfiguring Rmon Statistics BBI example Remote monitoring Select a port 157 Rmon group 2-history Remote monitoring Enable Rmon on the port History MIB objects Configure the Rmon History parameters Apply, verify, and save the configuration 160 Configure Rmon History BBI example Alarm MIB objects Rmon group 3-alarms Configure the Rmon Alarm parameters to track Icmp messages Configure Rmon Alarms BBI example Apply, verify, and save the configuration 163 164 Rmon group 9-events Configuring Rmon Events CLI exampleRemote monitoring Apply, verify, and save the configuration Configure the Rmon Event parameters Apply, verify, and save the configuration 166 Configuring Rmon Events BBI example High availability High availabilityUplink Failure Detection Spanning Tree Protocol with UFD Failure Detection Pair Monitoring Uplink Failure Detection Configuring Uplink Failure Detection Create a trunk group of uplink ports 18-21 to monitor Configuring UFD on Switch 1 CLI exampleConfiguring UFD on Switch 2 CLI example Turn UFD on Configuring Uplink Failure Detection BBI example Apply, verify, and save the configuration 172 Virtual router MAC address Vrrp overviewVrrp components Virtual router Virtual Interface Router Master and backup virtual routerVrrp operation Selecting the master Vrrp router Active-Active redundancy Failover methods Parameter HP 10GbE switch extensions to VrrpTracking Vrrp router priority Assigning Vrrp virtual router ID Configuring the switch for trackingVirtual router deployment considerations Configure ports High availability configurationsActive-Active configuration Task 1 Configure Switch a 179 High availability Configure client and server interfacesTurn on Vrrp and configure two Virtual Interface Routers Turn off Spanning Tree Protocol globally Task 2 Configure Switch B Vrrp Virtual Router 1# Task 1 Configure Switch a BBI example Click Submit 183 184 Page High availability Enable Vrrp processing 187 Click Submit Select Add Virtual Router Click Submit High availability 189 Apply, verify, and save the configuration 190 Port Mirroring Troubleshooting toolsTroubleshooting tools Select the ports that you want to mirror Configuring Port Mirroring CLI exampleEnable Port Mirroring View the current configuration Configuring Port Mirroring BBI example Click Add Mirrored Port Other network troubleshooting techniques Page 197 IndexIndex 198