About Mtu Configuration; Configuring Ethernet Interfaces; Configuring The Udld Mode - Cisco AP775A - Nexus Converged Network Switch 5010 Configuration Manual

Configuring Ethernet Interfaces

You can enable the debounce timer for each interface and specify the delay time in milliseconds.
Caution When you enable the port debounce timer the link up and link down detections are delayed, resulting in
a loss of traffic during the debounce period. This situation might affect the convergence and reconvergence
of some protocols.

About MTU Configuration

The Cisco Nexus 5000 Series switch is a Layer 2 device. This means it does not fragment frames. As a result,
the switch cannot have two ports in the same Layer 2 domain with different maximum transmission units
(MTUs). A per-physical Ethernet interface MTU is not supported. Instead, the MTU is set according to the
QoS classes. You modify the MTU by setting Class and Policy maps.
When you show the interface settings, a default MTU of 1500 is displayed for physical Ethernet interfaces
Note
and a receive data field size of 2112 is displayed for Fibre Channel interfaces.
Configuring Ethernet Interfaces

Configuring the UDLD Mode

You can configure normal or aggressive unidirectional link detection (UDLD) modes for Ethernet interfaces
on devices configured to run UDLD. Before you can enable a UDLD mode for an interface, you must make
sure that UDLD is already enabled on the device that includes the interface. UDLD must also be enabled on
the other linked interface and its device.
To use the normal UDLD mode, you must configure one of the ports for normal mode and configure the other
port for the normal or aggressive mode. To use the aggressive UDLD mode, you must configure both ports
for the aggressive mode.
Note Before you begin, UDLD must be enabled for the other linked port and its device.
To configure the UDLD mode, perform this task:
Procedure
Step 1
Step 2
Step 3
Step 4
OL-16597-01
Command or Action
switch# configure terminal
switch(config)# feature udld
switch(config)# no feature udld
switch(config)# show udld global
Cisco Nexus 5000 Series Switch CLI Software Configuration Guide
About MTU Configuration
Purpose
Enters configuration mode.
Enables UDLD for the device.
Disables UDLD for the device.
Displays the UDLD status for the device.
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