Users Guide

Example (virtual-
interface)
agg-6146 # show spanning-tree msti 0 virtual-interface
VFP(VirtualFabricPort) of MSTI 0 is Designated Forwarding
Edge port: No (default)
Link type: point-to-point (auto)
Boundary: No, Bpdu-filter: Disable, Bpdu-Guard: Disable, Shutdown-on-Bpdu-Guard-violation: No
Root-Guard: Disable, Loop-Guard: Disable
Bpdus (MRecords) Sent: 250, Received: 240
Interface Designated
Name PortID Prio Cost Sts Cost Bridge ID PortID
-------------------------------------------------------------------------------------------------------------------
VFP(VirtualFabricPort) 0.1 0 1 FWD 0 32768 3417.ebf2.a8c4 0.1
Command
History
10.2.0E or later
Virtual LANs
VLANs segment a single flat L2 broadcast domain into multiple logical L2 networks. Each VLAN is uniquely identified by a
VLAN ID or tag consisting of 12 bits in the Ethernet frame. VLAN IDs range from 1 to 4093 and provide a total of 4093 logical
networks.
You can assign ports on a single physical device to one or more VLANs creating multiple logical instances on a single physical
device. The virtual logical switches spanning across different physical devices emulate multiple logically segmented L2 networks
on a single physical network.
Each VLAN has its own broadcast domain. The unicast, multicast, and broadcast network traffic from ports that belong to a
VLAN forwards or floods to ports in the same VLAN only. Traffic between VLANs routes from one VLAN to another. You can
also assign each VLAN an IP address to group all the ports within a single IP subnet.
In SmartFabric Services mode, you can configure up to a maximum of 256 uplink VLANs including the default VLAN given the
limited hardware capability. For each of the uplink VLAN interface, the system creates an ACL entry to classify the traffic. This
ACL entry maps the traffic from the VLAN to the corresponding traffic-class (TC) queue. If you create more than 256 VLANs,
ACL table creation fails when the uplinks are created in the Fiber Channel Gateway or the Fiber Channel Direct Attach mode.
In SmartFabric mode, although you can use the CLI to create VLANs 1 to 4000 and 4021 to 4094, you cannot assign interfaces
to them. For this reason, do not use the CLI to create VLANs in SmartFabric mode.
Segment a L2 network using VLANs to:
● Minimize broadcast and multicast traffic in the L2 network
● Increase security by isolating ports into different VLANs
● Ease network management
Configuration notes
All Dell EMC PowerSwitches except MX-Series, S4200-Series, S5200 Series, and Z9332F-ON:
The valid VLAN ID range displays as 1-4093. VLAN IDs 4094 and 4095 are reserved for internal use.
Default VLAN
All interface ports are administratively up in L2 mode and are automatically placed in the default VLAN as untagged interfaces.
When you assign a port to a non-default VLAN in Trunk mode, the interface remains an untagged member of the default VLAN
and a tagged member of the new VLAN. When you assign a port to a non-default VLAN in Access mode, it removes from the
default VLAN and is assigned to the new VLAN as an untagged member of the new VLAN.
● VLAN 1 is the default VLAN.
● You cannot delete the default VLAN. However, you can change the default VLAN ID number using the default vlan-id
command.
When the default VLAN is changed from VLAN 1 to any other VLAN, IGMP snooping gets enabled in VLAN 1. To disable IGMP
snooping on VLAN 1, use the no ip igmp snooping command in VLAN INTERFACE mode.
NOTE:
The IOM cluster running 10.5.x and 10.4.x does not work as expected when the untagged VLAN is not VLAN1 on the
server ports.
Use the show vlan command to verify that the interface is part of the default VLAN (VLAN 1).
Layer 2
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