Reference Guide
Time Domain Reectometer (TDR) Commands
TDR is useful for troubleshooting an interface that is not establishing a link; either it is apping or not coming up at all. TDR detects
open or short conditions of copper cables on 100/1000/10G Base-T modules.
• tdr-cable-test
• show tdr
Important Points to Remember
• The interface and port must be enabled (congured—see the interface command) before running TDR. An error message is
generated if you have not enabled the interface.
• The interface on the far-end device must be shut down before running TDR.
• Because TDR is an intrusive test on an interface that is not establishing a link, do not run TDR on an interface that is passing
trac.
• When testing between two devices, do not run the test on both ends of the cable.
Virtual LAN (VLAN) Commands
The following commands congure and monitor virtual local area networks (VLANs). VLANs are a virtual interface and use many of
the same commands as physical interfaces.
You can congure an IP address only on the default VLAN. FTP, TFTP, ACLs, and SNMP are not supported on a VLAN.
Occasionally, while sending broadcast trac over multiple VLANs, state of a VLAN interface may continually switch between Master
and Backup.
• auto vlan
• default vlan-id
• name
• show cong (from INTERFACE VLAN mode)
• show vlan
• vlan tagged
• vlan untagged
auto vlan
Change the port to auto or admin vlan mode (enable or disable all auto VLANs).
Syntax
auto vlan
To remove membership from 4K VLAN, use the no auto vlan command.
Defaults none
Parameters
description Enter a text string description to identify the VLAN (80 characters maximum).
Command Modes INTERFACE
Supported Modes Standalone Mode
Usasge Information The auto vlan command adds the port as untagged to default vlan and tagged to all other 4094 VLAN.
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