OS6860(E)_AOS_8.1.1.R01_Switch_Management_Guide

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Working with SNMP Traps Using SNMP Working with SNMP Traps The SNMP agent in the switch has the ability to send traps to the management station. It is not required that the management station request them. Traps are messages alerting the SNMP manager to a condition on the network. A trap message is sent via a PDU issued from the switch’s network management agent. It is sent to alert the management station to some event or condition on the switch. Traps can indicate improper user authentication, restarts, the loss of a connection, or other significant events. You can configure the switch so that traps are forwarded to or suppressed from transmission to the management station under different circumstances. Trap Filtering You can filter SNMP traps in at least two ways. You can filter traps by limiting user access to trap families or you can filter according to individual traps. Filtering by Trap Families Access to SNMP traps can be restricted by withholding access privileges for user accounts to certain command families or domains. (Designation of particular command families for user access is sometimes referred to as partition management.) SNMP traps are divided into functional families as shown in the “Using SNMP For Switch Security” on page 9-9. These families correspond to switch CLI command families. When read-only privileges for a user account are restricted for a command family, that user account is also restricted from reading traps associated with that family. Procedures for filtering traps according to command families can be found in the Quick Steps for “Filtering by Trap Families” on page 9-4. For a list of trap names, command families, and their descriptions refer to the “Using SNMP For Switch Security” on page 9-9. Filtering By Individual Trap You can configure the switch to filter out individual traps by using the snmp-trap filter-ip command. This command allows you to suppress specified traps from the management station. The following information is needed to suppress specific traps: • The IP address of the SNMP management station that will receive the traps. • The ID number of the individual traps to be suppressed. Procedures for filtering individual traps can be found in the Quick Steps for “Filtering by Individual Traps” on page 9-5. For a list of trap names, ID numbers, and their descriptions refer to the table “Using SNMP For Switch Security” on page 9-9. page 9-12 OmniSwitch AOS Release 8 Switch Management Guide May 2014
Using SNMP Working with SNMP Traps Authentication Trap The authentication trap is sent when an SNMP authentication failure is detected. This trap is a signal to the management station that the switch received a message from an unauthorized protocol entity. This normally means that a network entity attempted an operation on the switch for which it had insufficient authorization. When the SNMP authentication trap is enabled, the switch will forward a trap to the management station. The following command will enable the authentication trap: -> snmp authentication trap enable The trap will be suppressed if the SNMP authentication trap is disabled. Trap Management Several CLI commands allow you to control trap forwarding from the agent in the switch to the SNMP management station. Replaying Traps The switch normally stores all traps that have been sent out to the SNMP management stations. You can list the last stored traps by using the show snmp-trap replay-ip command. This command lists the traps along with their sequence number. The sequence number is a record of the order in which the traps were previously sent out. You may want to replay traps that have been stored on the switch for testing or troubleshooting purposes. This is useful in the event when any traps are lost in the network. To replay stored traps, use the snmp trap replay command followed by the IP address for an SNMP management station. This command replays (or re-sends) all stored traps from the switch to the specified management station on demand. If you do not want to replay all of the stored traps, you can specify the sequence number from which the trap replay will start. The switch will start the replay with a trap sequence number greater than or equal to the sequence number given in the CLI command. The number of traps replayed depends on the number of traps stored for this station. Absorbing Traps The switch may send the same traps to the management station many, many times. You can suppress the transmission of identical repetitive traps by issuing the snmp-trap absorption command. When trap absorption is enabled, traps that are identical to traps previously sent will be suppressed and therefore not forwarded to the SNMP management station. The following command will enable SNMP trap absorption: -> snmp trap absorption enable To view or verify the status of the Trap Absorption service, use the show snmp-trap config command. Sending Traps to WebView When WebView forwarding is enabled, all traps sent by switch applications are also forwarded to WebView. The following command allows a WebView session to retrieve the trap history log: -> snmp trap to webview enable OmniSwitch AOS Release 8 Switch Management Guide May 2014 page 9-13
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Part No. 060391-10, Rev. A May 2014
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Contents About This Guide .........
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Contents Using the Switch as an FTP
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Contents Account and Password Polic
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Contents Authentication Trap ......
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Contents Firmware Upgrade Files ...
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About This Guide This OmniSwitch AO
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About This Guide Documentation Road
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About This Guide Related Documentat
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1 Logging Into the Switch Logging i
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Logging Into the Switch Quick Steps
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Logging Into the Switch Overview of
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Logging Into the Switch Accessing t
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Logging Into the Switch Setting the
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Logging Into the Switch Using Secur
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Logging Into the Switch Modifying t
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Logging Into the Switch Enabling th
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Logging Into the Switch Enabling th
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2 Managing System Files This chapte
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Managing System Files Switch Admini
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Managing System Files File and Dire
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Managing System Files Loading Softw
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Managing System Files Setting the S
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Managing System Files Setting the S
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3 Managing CMM Directory Content Th
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Managing CMM Directory Content CMM
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4 Using the CLI Alcatel-Lucent’s
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Using the CLI Command Entry Rules a
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Using the CLI Command Help -> sh vl
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Using the CLI Logging CLI Commands
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Using the CLI Customizing the Scree
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5 Working With Configuration Files
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Working With Configuration Files Tu
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Page 119 and 120: 7 Managing Switch Security Switch s
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Page 133 and 134: Using WebView WebView CLI Commands
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Page 137 and 138: 9 Using SNMP The Simple Network Man
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Managing Automatic Remote Configura
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13 Configuring Virtual Chassis A Vi
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Configuring Virtual Chassis Virtual
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Configuring Virtual Chassis Quick S
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Configuring Virtual Chassis Managin
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Configuring Virtual Chassis Managin
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Configuring Virtual Chassis Interac
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Configuring Virtual Chassis Configu
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Configuring Virtual Chassis Configu
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Configuring Virtual Chassis Display
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A Software License and Copyright St
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Alcatel-Lucent License Agreement Al
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B SNMP Trap Information This append
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SNMP Traps Table No. Trap Name Obje
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Index Symbols !! command 4-6 A aaa
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Index Network Time Protocol see NTP
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OS6860(E)_AOS_8.1.1.R01_Switch_Management_Guide

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