Juniper Networks EX2500 manual Remote Monitoring, Rmon Overview

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Chapter 6

Remote Monitoring

Remote Monitoring (RMON) allows network devices to exchange network monitoring data. The following topics are discussed in this chapter:

RMON Overview on page 65

RMON Group 1—Statistics on page 66

RMON Group 2—History on page 67

RMON Group 3—Alarms on page 68

RMON Group 9—Events on page 69

RMON Overview

RMON allows the switch to track events and trigger alarms when a threshold is reached and to notify administrators by issuing a syslog message or SNMP trap.

The RMON MIB provides an interface between the RMON agent on the switch and an RMON management application. The RMON MIB is described in RFC 1757.

The RMON standard defines objects that are suitable for the management of Ethernet networks. The RMON agent continuously collects statistics and proactively monitors switch performance. RMON allows you to monitor traffic flowing through the switch.

The switch supports the following RMON Groups, as described in RFC 1757:

Group 1: Statistics

Group 2: History

Group 3: Alarms

Group 9: Events

RMON Overview 65

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Contents North Mathilda Avenue Sunnyvale, CA Configuration GuideIi „ Table of Contents Chapter VLANs Rmon Overview Rmon Group 1-Statistics Rmon Group 2-History Chapter Ports and TrunkingAppendixes Port Mirroring Overview Configuring Port MirroringIndexes Port-Based Vlan Assignment Default Vlan SettingsPage List of Tables EX2500 Ethernet Switch Configuration Guide „ List of Tables Supported Platforms About This GuideObjectives AudienceIcon Meaning Description Documentation ConventionsDocumentation Feedback List of Technical PublicationsRequesting Technical Support Opening a Case with Jtac Self-Help Online Tools and ResourcesEX2500 Ethernet Switch Applications Page Configuring the Management Interface Accessing the SwitchConfigure the default gateway. Enable the gateway Dynamic Host Configuration ProtocolUsing the EX2500 Web Device Manager Using TelnetConfiguring EX2500 Web Device Manager Access via Https Configuring EX2500 Web Device Manager Access via HttpSNMPv1, SNMPv2 Using SnmpUser Configuration Default ConfigurationSNMPv3 Configure an entry in the notify table Configuring Snmp Trap HostsSNMPv1 Trap Host Configuration SNMPv2 Trap Host ConfigurationSNMPv3 Trap Host Configuration Securing Access to the SwitchConfigure the Radius secret Radius Authentication and AuthorizationHow Radius Authentication Works Configuring Radius on the SwitchRadius Authentication Features in the EX2500 Switch Radius Attributes for EX2500 User Privileges Switch User AccountsHow TACACS+ Authentication Works TACACS+ AuthenticationTACACS+ Authentication Features in the EX2500 Switch „ starttime „ stoptime „ elapsedtime „ disccause Configuring TACACS+ Authentication on the Switch Command Authorization and LoggingConfigure the TACACS+ secret and second secret SSH Encryption of Management Messages Configuring SSH Features on the SwitchGenerating RSA Host and Server Keys for SSH Access Secure ShellSSH Integration with Radius and TACACS+ Authentication End User Access ControlUser Access Control Considerations for Configuring End User AccountsLogging In to an End User Account Listing Current UsersVlan Overview VLANsPvid Numbers „ Port configurationVLANs and Port Vlan ID Numbers Vlan NumbersVlan Tagging Illustrates the default Vlan settings on the switchDefault Vlan Settings Port-Based Vlan Assignment Vlan Topologies and Design Considerations Vlan Configuration RulesMultiple VLANs example in is described in Table Multiple VLANs Configuration ExampleEnable tagging on uplink ports that support multiple VLANs Private Vlan Ports Private VLANsVerify the configuration Private Vlan Configuration GuidelinesPrivate Vlan Configuration Example Configure a secondary Vlan and map it to the primary VlanSpanning Tree Overview Spanning Tree ProtocolDetermining the Path for Forwarding BPDUs Bridge Protocol Data Units BPDUsBridge Priority Port Path Cost Spanning Tree Group Configuration GuidelinesChanging the Spanning Tree Mode Port PriorityRules for Vlan Tagged Ports Creating a VlanAdding and Removing Ports from STGs Port State Changes Rapid Spanning Tree ProtocolEdge Port Rstp Configuration GuidelinesRstp Configuration Example Port Type and Link TypeWhy Do We Need Multiple Spanning Trees? Default Spanning Tree ConfigurationPer Vlan Rapid Spanning Tree Configuring Pvrst Pvrst Configuration GuidelinesCommon Internal Spanning Tree Mstp Configuration GuidelinesMultiple Spanning Tree Protocol Mstp RegionImplementing Multiple Spanning Tree Groups Multiple Spanning Tree Groups Configuration ExampleVlan Fast Uplink ConvergenceConfiguring Fast Uplink Convergence Configuration GuidelinesTrunking Overview Ports and TrunkingStatistical Load Distribution Before Configuring Static Trunks Built-In Fault ToleranceTrunk Group Configuration Rules Port Trunk Group Configuration Example Port Trunking Configuration ExampleFollow these steps on the EX2500 switch Define a trunk group „ Destination IP DIP Configurable Trunk Hash AlgorithmLink Aggregation Control Protocol „ Destination MAC Dmac48 „ Link Aggregation Control Protocol Set the Lacp mode Lacp Configuration GuidelinesConfiguring Lacp Optionally Reducing Lacp TimeoutEx2500config-if# lacp timeout short ex2500config-if# exit QoS Overview Quality of ServiceCOS Using ACL FiltersTo delete an IP Standard ACL MAC Extended ACLsIP Standard ACLs To delete a MAC Extended ACLTo delete an IP Extended ACL IP Extended ACLsTCP/UDP Understanding ACL PriorityACL Example 1-Blocking Traffic to a Host ACL Configuration ExamplesAssigning ACLs to a Port Viewing ACL StatisticsAdd the ACL to a port ACL Example 3-Blocking Http TrafficAssign the ACLs to a port ACL Example 4-Blocking All Except Certain PacketsConfiguring Storm Control Using Storm Control FiltersBroadcast Storms Differentiated Services Concepts Using Dscp Values to Provide QoSAssured Forwarding Drop Precedence Class Per Hop BehaviorQoS Levels Use the following command to perform Dscp mappingDscp Mapping Shows the priority bits in a VLAN-tagged packet Using 802.1p Priority to Provide QoSQueuing and Scheduling Rmon Overview Remote MonitoringRmon Group 1-Statistics Configure the Rmon statistics on a portRmon Group 2-History Configuring Rmon HistoryConfigure the Rmon History parameters for a port This configuration enables Rmon History collection on portConfigure the Rmon Alarm parameters to track Icmp messages Rmon Group 3-AlarmsAlarm MIB Objects Configuring Rmon AlarmsRmon Group 9-Events Ex2500config# rmon event 110 type log-onlyPage Igmp Snooping IgmpFastLeave IGMPv3 Snooping Igmp Snooping Configuration ExampleEx2500# show ip igmp groups Static Multicast RouterHigh Availability Overview High Availability Through Uplink Failure DetectionFailure Detection Pair Spanning Tree Protocol with UFD UFD Configuration GuidelinesMonitoring UFD UFD Configuration ExamplePage Appendixes EX2500 Ethernet Switch Configuration Guide 80 „ Appendixes Port Mirroring Overview „ Port Mirroring Overview on „ Configuring Port Mirroring onConfiguring Port Mirroring „ Index on IndexesEX2500 Ethernet Switch Configuration Guide 84 „ Indexes Numerics IndexInternet Group Management Protocol. See Igmp Management interface, configuringMulti-links between switches, port trunking Physical. See switch portsSegmentation. See IP subnets Segments. See IP subnets Quality of Service. See QoSQoS SecurityExample showing multiple VLANs Virtual Local Area Networks. See VLANs