Users Guide

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Dell#
Link Dampening Support for XML
View the output of the following show commands in XML by adding | display xml to the end of the
command.
• show interfaces dampening
• show interfaces dampening summary
• show interfaces interface slot/port
Configure MTU Size on an Interface
In Dell Networking OS, Maximum Transmission Unit (MTU) is defined as the entire Ethernet packet (Ethernet
header + FCS + payload).
The link MTU is the frame size of a packet, and the IP MTU size is used for IP fragmentation. If the system
determines that the IP packet must be fragmented as it leaves the interface, Dell Networking OS divides the
packet into fragments no bigger than the size set in the ip mtu command.
NOTE: Because different networking vendors define MTU differently, check their documentation when
planning MTU sizes across a network.
The following table lists the range for each transmission media.
Transmission
Media
MTU Range (in bytes)
Ethernet
594-12000 = link MTU
576-9234 = IP MTU
Link Bundle Monitoring
Monitoring linked LAG bundles allows traffic distribution amounts in a link to be monitored for unfair
distribution at any given time. A threshold of 60% is defined as an acceptable amount of traffic on a member
link. Links are monitored in 15-second intervals for three consecutive instances. Any deviation within that time
sends Syslog and an alarm event generates. When the deviation clears, another Syslog sends and a clear
alarm event generates.
The link bundle utilization is calculated as the total bandwidth of all links divided by the total bytes-per-
second of all links. If you enable monitoring, the utilization calculation is performed when the utilization of
the link-bundle (not a link within a bundle) exceeds 60%.
To enable and view link bundle monitoring, use the following commands.
• Enable link bundle monitoring.
ecmp-group
• View all LAG link bundles being monitored.
Interfaces 404