CLI Guide

• All members of a VLAN must have same IP MTU value.
• Members can have different Link MTU values. Tagged members must have a
link MTU 4 bytes higher than untagged members to account for the packet tag.
• The VLAN link MTU and IP MTU must be less than or equal to the link MTU and
IP MTU values configured 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.
The following shows the difference between Link MTU and IP MTU.
Layer 2
Overhead
Link MTU and IP MTU Delta
Ethernet
(untagged)
18 bytes
VLAN Tag 22 bytes
Untagged Packet
with VLAN-Stack
Header
22 bytes
Tagged Packet
with VLAN-Stack
Header
26 bytes
portmode hybrid
To accept both tagged and untagged frames, set a physical port or port-channel. A port configured this
way is identified as a hybrid port in report displays.
Syntax
portmode hybrid
To return a port to accept either tagged or untagged frames (non-hybrid), use the
no portmode hybrid command.
Defaults non-hybrid
Command Modes INTERFACE
Command History
This guide is platform-specific. For command information about other platforms,
see the relevant Dell Networking OS Command Line Reference Guide.
Version Description
9.8(2.0) Introduced on the S3100 series.
9.8(0.0P5) Introduced on the S4048-ON.
9.8(0.0P2) Introduced on the S3048-ON.
9.7(0.0) Introduced on the S6000-ON.
9.2(1.0) Introduced on the Z9500.
754
Interfaces