Port channel commands, Time domain reflectometer (tdr) commands, Virtual lan (vlan) commands – Dell PowerEdge FX2/FX2s User Manual
Page 135: Important points to remember
Port Channel Commands
A Link Aggregation Group (LAG) is a group of links that appear to a MAC client as if they were a single link
according to IEEE 802.3ad. In Dell Networking OS, a LAG is referred to as a Port Channel.
• For the Aggregator, the maximum port channel ID is 128 and the maximum members per port
channel is 4.
Because each port can be assigned to only one Port Channel, and each Port Channel must have at least
one port, some of those nominally available Port Channels might have no function because they could
have no members if there are not enough ports installed.
NOTE: For information about Dell Networking OS link aggregation control protocol (LACP) for
Link Aggregation Control Protocol (LACP)
about configuring and using Port Channels, refer to the Dell PowerEdge FN 410S I/O Aggregator
Configuration Guide
Time Domain Reflectometer (TDR) Commands
TDR is useful for troubleshooting an interface that is not establishing a link; either it is flapping or not
coming up at all. TDR detects open or short conditions of copper cables on 100/1000/10G Base-T
modules.
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Important Points to Remember
• The interface and port must be enabled (configured—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 traffic.
• When testing between two devices, do not run the test on both ends of the cable.
Virtual LAN (VLAN) Commands
The following commands configure and monitor virtual local area networks (VLANs). VLANs are a virtual
interface and use many of the same commands as physical interfaces.
You can configure an IP address only on the default VLAN. FTP, TFTP, ACLs, and SNMP are not supported
on a VLAN.
Occasionally, while sending broadcast traffic over multiple VLANs, state of a VLAN interface may
continually switch between Master and Backup.
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