Administrator Guide

• portmode quad: Identifies the uplink port as a split 10GbE SFP+ port.
2 Save the configuration and reload the switch.
CONFIGURATION mode
write memory
reload
Important Points to Remember
• You cannot use split ports as stack-link to stack an MXL Switch.
• Split ports cannot be a part of any stacked system.
• The quad port must be in a default configuration before it can be split into 4x10G ports.
• The 40G port is lost in the configuration when the port is split; be sure the port is also removed from
other L2/L3 feature configurations.
• The system must be reloaded after issuing the CLI for the change to take effect.
Configure the MTU Size on an Interface
The link MTU is the frame size of a packet. 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, the system divides
the packet into fragments no bigger than the size set in the ip mtu command.
In the Dell Networking OS, MTU is defined as the entire Ethernet packet (Ethernet header + FCS + payload).
Because different networking vendors define MTU differently, check their documentation when planning
MTU sizes across a network.
The following table lists the various Layer 2 overheads found in the Dell Networking OS and the number of
bytes.
Table 26. Layer 2 Overhead
Transmission Media MTU Range (in bytes)
Ethernet
594-12000 = link MTU
576-11982 = IP MTU
Configuring wavelength for 10–Gigabit
SFP+ optics
You can set the wavelength for tunable 10–Gigabit SFP+ optics using the wavelength command. To set the
wavelength, follow these steps:
• Enter the interface mode and set the wavelength.
Interfaces 434