Deployment Guide

stack-unit port number portmode quad
• stack-unit: Enter the stack member unit identier of the stack member to reset. The range is from 0 to 5.
• port <port number> : Enter the port number of the 40G port to be split. The valid values on base module: 33 or 37; OPTM
SLOT 0: 41 or 45; OPTM SLOT 1: 49 or 53.
• portmode quad: Identies the uplink port as a split 10GbE SFP+ port.
To display the stack-unit number, enter the show system brief command.
• Save the conguration and reload the switch.
CONFIGURATION mode
write memory
reload
Merging SFP+ Ports to QSFP 40G Ports
To remove FANOUT mode in 40G QSFP Ports, use the following commands.
1 Merge 4-10G ports to a single 40G port.
CONFIGURATION mode
no stack-unit port number portmode quad
• stack-unit: Enter the stack member unit identier of the stack member to reset. The range is from 0 to 5.
• port <port number>: Enter the port number of the 40GbE QSFP+ port. Valid values on base module: 33 or 37; OPTM SLOT
0: 41 or 45; OPTM SLOT 1: 49 or 53.
• portmode quad: Identies the uplink port as a split 10GbE SFP+ port.
2 Save the conguration and reload the switch.
CONFIGURATION mode
write memory
reload
Important Points to Remember
• You cannot use split ports as stack-link to stack a switch.
• Split ports cannot be a part of any stacked system.
• The quad port must be in a default conguration before it can be split into 4x10G ports.
• The 40G port is lost in the conguration when the port is split; be sure the port is also removed from other L2/L3 feature
congurations.
• The system must be reloaded after issuing the CLI for the change to take eect.
Congure 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 dened as the entire Ethernet packet (Ethernet header + FCS + payload).
Because dierent networking vendors dene MTU dierently, check their documentation when planning MTU sizes across a network.
374
Interfaces