Juniper Networks EX2500 manual Securing Access to the Switch, SNMPv3 Trap Host Configuration

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EX2500 Ethernet Switch Configuration Guide

SNMPv3 Trap Host Configuration

To configure a user for SNMPv3 traps, you can choose to send the traps with both privacy and authentication, with authentication only, or without privacy or authentication.

This is configured in the access table with the following commands:

ex2500(config)# snmp-server access <1-32>level ex2500(config)# snmp-server target-parameters <1-16>

Configure the user in the user table accordingly.

It is not necessary to configure the community table for SNMPv3 traps because the community string is not used by SNMPv3.

The following example shows how to configure a SNMPv3 user v3trap with authentication only:

ex2500(config)# snmp-server user 11 name v3trap ex2500(config)# snmp-server user 11 authentication-protocol md5 authentication-password

Changing authentication password; validation required: Enter current admin password: <admin. password> Enter new authentication password: <auth. password> Re-enter new authentication password: <auth. password> New authentication password accepted. ex2500(config)# snmp-server access 11 notify-view iso ex2500(config)# snmp-server access 11 level authnopriv ex2500(config)# snmp-server group 11 user-name v3trap ex2500(config)# snmp-server group 11 tag v3trap ex2500(config)# snmp-server notify 11 name v3trap ex2500(config)# snmp-server notify 11 tag v3trap

ex2500(config)# snmp-server target-address 11 name v3trap address 47.81.25.66 ex2500(config)# snmp-server target-address 11 taglist v3trap ex2500(config)# snmp-server target-address 11 parameters-name v3param ex2500(config)# snmp-server target-parameters 11 name v3param ex2500(config)# snmp-server target-parameters 11 user-name v3trap ex2500(config)# snmp-server target-parameters 11 level authNoPriv

Securing Access to the Switch

Secure switch management is needed for environments that perform significant management functions across the Internet. Common functions for secured management are described in the following sections:

RADIUS Authentication and Authorization on page 11

TACACS+ Authentication on page 14

End User Access Control on page 18

10 Securing Access to the Switch

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Contents Configuration Guide North Mathilda Avenue Sunnyvale, CAIi „ Table of Contents Chapter VLANs Chapter Ports and Trunking Rmon Overview Rmon Group 1-Statistics Rmon Group 2-HistoryPort Mirroring Overview Configuring Port Mirroring AppendixesIndexes Default Vlan Settings Port-Based Vlan AssignmentPage List of Tables EX2500 Ethernet Switch Configuration Guide „ List of Tables About This Guide ObjectivesAudience Supported PlatformsDocumentation Conventions Icon Meaning DescriptionList of Technical Publications Documentation FeedbackRequesting Technical Support Self-Help Online Tools and Resources Opening a Case with JtacEX2500 Ethernet Switch Applications Page Accessing the Switch Configuring the Management InterfaceDynamic Host Configuration Protocol Configure the default gateway. Enable the gatewayUsing Telnet Using the EX2500 Web Device ManagerConfiguring EX2500 Web Device Manager Access via Http Configuring EX2500 Web Device Manager Access via HttpsUsing Snmp SNMPv1, SNMPv2Default Configuration User ConfigurationSNMPv3 Configuring Snmp Trap Hosts SNMPv1 Trap Host ConfigurationSNMPv2 Trap Host Configuration Configure an entry in the notify tableSecuring Access to the Switch SNMPv3 Trap Host ConfigurationRadius Authentication and Authorization How Radius Authentication WorksConfiguring Radius on the Switch Configure the Radius secretRadius Authentication Features in the EX2500 Switch Switch User Accounts Radius Attributes for EX2500 User PrivilegesTACACS+ Authentication How TACACS+ Authentication WorksTACACS+ Authentication Features in the EX2500 Switch „ starttime „ stoptime „ elapsedtime „ disccause Command Authorization and Logging Configuring TACACS+ Authentication on the SwitchConfigure the TACACS+ secret and second secret Configuring SSH Features on the Switch Generating RSA Host and Server Keys for SSH AccessSecure Shell SSH Encryption of Management MessagesEnd User Access Control SSH Integration with Radius and TACACS+ AuthenticationConsiderations for Configuring End User Accounts User Access ControlListing Current Users Logging In to an End User AccountVLANs Vlan Overview„ Port configuration VLANs and Port Vlan ID NumbersVlan Numbers Pvid NumbersIllustrates the default Vlan settings on the switch Vlan TaggingDefault Vlan Settings Port-Based Vlan Assignment Vlan Configuration Rules Vlan Topologies and Design ConsiderationsMultiple VLANs Configuration Example Multiple VLANs example in is described in TableEnable tagging on uplink ports that support multiple VLANs Private VLANs Private Vlan PortsPrivate Vlan Configuration Guidelines Private Vlan Configuration ExampleConfigure a secondary Vlan and map it to the primary Vlan Verify the configurationSpanning Tree Protocol Spanning Tree OverviewBridge Protocol Data Units BPDUs Determining the Path for Forwarding BPDUsBridge Priority Spanning Tree Group Configuration Guidelines Changing the Spanning Tree ModePort Priority Port Path CostCreating a Vlan Rules for Vlan Tagged PortsAdding and Removing Ports from STGs Rapid Spanning Tree Protocol Port State ChangesRstp Configuration Guidelines Rstp Configuration ExamplePort Type and Link Type Edge PortDefault Spanning Tree Configuration Why Do We Need Multiple Spanning Trees?Per Vlan Rapid Spanning Tree Pvrst Configuration Guidelines Configuring PvrstMstp Configuration Guidelines Multiple Spanning Tree ProtocolMstp Region Common Internal Spanning TreeMultiple Spanning Tree Groups Configuration Example Implementing Multiple Spanning Tree GroupsFast Uplink Convergence VlanConfiguration Guidelines Configuring Fast Uplink ConvergencePorts and Trunking Trunking OverviewStatistical Load Distribution Built-In Fault Tolerance Before Configuring Static TrunksTrunk Group Configuration Rules Port Trunking Configuration Example Port Trunk Group Configuration ExampleFollow these steps on the EX2500 switch Define a trunk group Configurable Trunk Hash Algorithm Link Aggregation Control Protocol„ Destination MAC Dmac „ Destination IP DIP48 „ Link Aggregation Control Protocol Lacp Configuration Guidelines Configuring LacpOptionally Reducing Lacp Timeout Set the Lacp modeEx2500config-if# lacp timeout short ex2500config-if# exit Quality of Service QoS OverviewUsing ACL Filters COSMAC Extended ACLs IP Standard ACLsTo delete a MAC Extended ACL To delete an IP Standard ACLIP Extended ACLs To delete an IP Extended ACLUnderstanding ACL Priority TCP/UDPACL Configuration Examples Assigning ACLs to a PortViewing ACL Statistics ACL Example 1-Blocking Traffic to a HostACL Example 3-Blocking Http Traffic Add the ACL to a portACL Example 4-Blocking All Except Certain Packets Assign the ACLs to a portUsing Storm Control Filters Configuring Storm ControlBroadcast Storms Using Dscp Values to Provide QoS Differentiated Services ConceptsPer Hop Behavior Assured Forwarding Drop Precedence ClassUse the following command to perform Dscp mapping QoS LevelsDscp Mapping Using 802.1p Priority to Provide QoS Shows the priority bits in a VLAN-tagged packetQueuing and Scheduling Remote Monitoring Rmon OverviewConfigure the Rmon statistics on a port Rmon Group 1-StatisticsConfiguring Rmon History Configure the Rmon History parameters for a portThis configuration enables Rmon History collection on port Rmon Group 2-HistoryRmon Group 3-Alarms Alarm MIB ObjectsConfiguring Rmon Alarms Configure the Rmon Alarm parameters to track Icmp messagesEx2500config# rmon event 110 type log-only Rmon Group 9-EventsPage Igmp Igmp SnoopingFastLeave Igmp Snooping Configuration Example IGMPv3 SnoopingStatic Multicast Router Ex2500# show ip igmp groupsHigh Availability Through Uplink Failure Detection High Availability OverviewSpanning Tree Protocol with UFD UFD Configuration Guidelines Failure Detection PairUFD Configuration Example Monitoring UFDPage Appendixes EX2500 Ethernet Switch Configuration Guide 80 „ Appendixes „ Port Mirroring Overview on „ Configuring Port Mirroring on Port Mirroring OverviewConfiguring Port Mirroring Indexes „ Index onEX2500 Ethernet Switch Configuration Guide 84 „ Indexes Index NumericsManagement interface, configuring Multi-links between switches, port trunkingPhysical. See switch ports Internet Group Management Protocol. See IgmpQuality of Service. See QoS QoSSecurity Segmentation. See IP subnets Segments. See IP subnetsVirtual Local Area Networks. See VLANs Example showing multiple VLANs