Deployment Guide

The tag header contains some key information used by Dell Networking OS:
• The VLAN protocol identier identies the frame as tagged according to the IEEE 802.1Q specications (2 bytes).
• Tag control information (TCI) includes the VLAN ID (2 bytes total). The VLAN ID can have 4,096 values, but two are reserved.
NOTE: The insertion of the tag header into the Ethernet frame increases the size of the frame to more than the 1518 bytes
specied in the IEEE 802.3 standard. Some devices that are not compliant with IEEE 802.3 may not support the larger frame
size.
Information contained in the tag header allows the system to prioritize trac and to forward information to ports associated with a specic
VLAN ID. Tagged interfaces can belong to multiple VLANs, while untagged interfaces can belong only to one VLAN.
Conguring VLAN Membership
By default, all Aggregator ports are member of all (4094) VLANs, including the default untagged VLAN 1. You can use the CLI or CMC
interface to recongure VLANs only on server-facing interfaces (1–32) so that an interface has membership only in specied VLANs.
To assign an Aggregator interface in Layer 2 mode to a specied group of VLANs, use the vlan tagged and vlan untagged
commands. To view which interfaces are tagged or untagged and to which VLAN they belong, use the show vlan command (Displaying
VLAN Membership).
To recongure an interface as a member of only specied tagged VLANs, enter the vlan tagged command in INTERFACE mode:
1 Add the interface as a tagged member of one or more VLANs.
INTERFACE mode
vlan tagged {vlan-id | vlan-range}
vlan-id species a tagged VLAN number. Range: 2-4094
vlan-range species a range of tagged VLANs. Separate VLAN IDs with a comma; specify a VLAN range with a dash; for example,
vlan tagged 3,5-7.
To recongure an interface as a member of only specied untagged VLANs, enter the vlan untagged command in INTERFACE mode:
1 Add the interface as an untagged member of one or more VLANs.
INTERFACE mode
vlan untagged {vlan-id | vlan-range}
vlan-id species an untagged VLAN number. Range: 2-4094
vlan-range species a range of untagged VLANs. Separate VLAN IDs with a comma; specify a VLAN range with a dash; for example,
vlan tagged 3,5-7.
When you delete a VLAN (using the no vlan vlan-id command), any interfaces assigned to the VLAN are assigned to the default
VLAN as untagged interfaces.
If you congure additional VLAN membership and save it to the startup conguration, the new VLAN conguration is activated following a
system reboot.
Dell Networking OS Behavior:When two or more server-facing ports with VLAN membership are congured in a LAG based on the NIC
teaming conguration in connected servers learned via LACP, the resulting LAG is a tagged member of all the congured VLANs and an
untagged member of the VLAN to which the port with the lowest port ID belongs. For example, if port 0/3 is an untagged member of
Interfaces
107