Concept Guide

• The VLAN link MTU and IP MTU must be less than or equal to the link MTU and IP MTU values congured on the VLAN members.
For example, the VLAN contains tagged members with Link MTU of 1522 and IP MTU of 1500 and untagged members with Link MTU of
1518 and IP MTU of 1500. The VLAN’s Link MTU cannot be higher than 1518 bytes and its IP MTU cannot be higher than 1500 bytes.
NOTE: When conguring IP MTU on an interface, make sure to set the same or maximum IP MTU value on both ingress and
egress interfaces to make IPv4 trac ow.
Port-Pipes
A port pipe is a Dell EMC Networking-specic term for the hardware packet-processing elements that handle network trac to and from a
set of front-end I/O ports. The physical, front-end I/O ports are referred to as a
port-set. In the command-line interface, a port pipe is
entered as port-set port-pipe-number.
Auto-Negotiation on Ethernet Interfaces
By default, auto-negotiation of speed and full duplex mode is enabled on 100/1000 Base-T Ethernet interfaces. Only 10GE interfaces do not
support auto-negotiation.
When using 10GE interfaces, verify that the settings on the connecting devices are set to no auto-negotiation.
The local interface and the directly connected remote interface must have the same setting, and auto-negotiation is the easiest way to
accomplish that, as long as the remote interface is capable of auto-negotiation.
NOTE: As a best practice, Dell EMC Networking recommends keeping auto-negotiation enabled. Only disable auto-negotiation
on switch ports that attach to devices not capable of supporting negotiation or where connectivity issues arise from
interoperability issues.
NOTE: If the interface does not come up when you congure 10/100/1000G speed, congure the interface speed using the
speed command manually on both the ends and disable autonegotiation if it is enabled.
Setting the speed to 10/100/1000 Mbps on SFP-1G-T
transceiver
Dell EMC Networking OS allows you to disable the auto-negotiation on the SFP-1G-T transceiver connected interface and set the speed
manually to 10/100/1000 Mbps. You can disable the auto-negotiation using no negotiation auto command and enable setting the
interface speed using the
speed command at the INTERFACE mode.
Setting the Speed of Ethernet Interfaces
To discover whether the remote and local interface requires manual speed synchronization, and to manually synchronize them if necessary,
use the following command sequence.
1 Determine the local interface status. Refer to the following example.
EXEC Privilege mode
show interfaces [interface | stack—unit stack-unit-number] status
2 Determine the remote interface status.
EXEC mode or EXEC Privilege mode
[Use the command on the remote system that is equivalent to the rst command.]
3 Access CONFIGURATION mode.
452
Interfaces