Cisco Nexus 7000 Series

M Commands
mtu
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Cisco Nexus 7000 Series NX-OS System Management Command Reference
OL-25806-03
mtu
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.
mtu mtu-size
no mtu
Syntax Description
Defaults Disabled
Command Modes Monitor configuration (config-monitor)
Supported User Roles network-admin
vdc-admin
Command History
Usage Guidelines Make sure that you are in the correct virtual device context (VDC). To change the VDC, use the switchto
vdc command.
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. This limitation does not apply to F2 and M2 Series modules
or Supervisor 2.
MTU truncation and the ERSPAN source rate limit are supported only on F Series and M2 Series
modules and Supervisor 2. They are not supported on M1 Series modules.
Note MTU truncation and ERSPAN sampling can be enabled at the same time and have no precedence over
each other because they are applied to different aspects of the source packet (size versus packet count).
This command does not require a license.
mtu-size MTU truncation size. The configurable range is from 176 to 1500 bytes. The
local SPAN range is from 64 to 1500 bytes.
Release Modification
6.1(1) Starting with 6.1, MTU truncation also support ERSPAN session.
5.2(1) This command was introduced.