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This chapter describes the system management commands that begin with M.
To configure the Encapsulated Remote Switched Port Analyzer (ERSPAN) origin IP address, use the monitor espan origin ip-address command. To remove the ERSPAN origin IP address configuration, use the no form of this command.
monitor erspan origin ip-address ip-address [ global ]
no monitor erspan origin ip-address ip-address [ global ]
(Optional) Specifies the default virtual device context (VDC) configuration across all VDCs. |
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When you change the origin IP address in the default VDC, it impacts all the sessions.
This example shows how to configure the ERSPAN origin IP address:
This example shows how to remove the ERSPAN IP address:
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To create a new Ethernet Switched Port Analyzer (SPAN) or an Encapsulated Remote Switched Port Analyzer (ERSPAN) session configuration for analyzing traffic between ports or add to an existing session configuration, use the monitor session command. To clear SPAN or ERSPAN sessions, use the no form of this command.
monitor session { session-number [ shut | type { local | erspan-source } | all shut }
no monitor session { session-number | all } [ shut ]
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To ensure that you are working with a completely new session, you can clear the desired session number or all SPAN sessions.
Note The Cisco Nexus device supports two active SPAN sessions. The Cisco Nexus 5548 Switch supports four active SPAN sessions. When you configure more than two SPAN sessions, the first two sessions are active. During startup, the order of active sessions is reversed; the last two sessions are active. For example, if you configured ten sessions 1 to 10 where 1 and 2 are active, after a reboot, sessions 9 and 10 will be active. To enable deterministic behavior, explicitly suspend the sessions 3 to 10 with the monitor session session-number shut command.
Does the 5548 note apply to the 6000?
Note The limit on the number of egress (TX) sources in a monitor session has been lifted. Port-channel interfaces can be configured as egress sources.
After you create an ERSPAN session, you can describe the session and add interfaces and VLANs as sources and destinations.
This example shows how to create a SPAN session:
This example shows how to enter the monitor configuration mode for configuring SPAN session number 9 for analyzing traffic between ports:
This example shows how to configure any SPAN destination interfaces as Layer 2 SPAN monitor ports before activating the SPAN session:
This example shows how to configure a typical SPAN destination trunk interface:
This example shows how to create an ERSPAN session:
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Sets the maximum transmission value (MTU) for ERSPAN packets. |
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To configure the maximum transmission unit (MTU) truncation size for packets in the specified Ethernet Switched Port Analyzer (SPAN) session, use the mtu command. To remove the MTU truncation size configuration, use the no form of this command.
Monitor configuration (config-monitor)
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MTU truncation and the SPAN rate limit cannot be enabled for the same SPAN session. If you configure both for one session, only the rate limit is allowed on F1 Series modules, and MTU truncation is disabled until you disable the rate limit configuration.
Note MTU turncation is supported only on F1 Series modules and F2 Series modules.
This example shows how to configure the MTU truncation size for packets in the specified SPAN session:
This example shows how to remove the MTU truncation size configuration for packets in the specified SPAN session:
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Places you in the monitor configuration mode for configuring a SPAN session. |
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