Administrator Guide

is from 0 to 255; the stack-unit unit-number range is from 0 to 7; and the
port-id range is 25 to 28 or 49 to 52 depending on the PE.
Defaults All interfaces in Layer 2 mode are untagged.
Command Modes INTERFACE VLAN
Command
History
This guide is platform-specific. For command information about other platforms, see the relevant Dell
Networking OS Command Line Reference Guide.
The following is a list of the Dell Networking OS version history for this command.
Version Description
9.13.0.1P1 Introduced peTenGigE interface support on the C9010.
9.9(0.0) Introduced on the C9010.
9.2(1.0) Introduced on the Z9500.
8.3.19.0 Introduced on the S4820T.
8.3.11.1 Introduced on the Z9000.
8.5.1.0 Added support for 4-port 40G line cards on ExaScale.
8.3.7.0 Introduced on the S4810.
7.6.1.0 Introduced on the S-Series.
7.5.1.0 Introduced on the C-Series.
6.2.1.1 Introduced on the E-Series.
Usage
Information
Untagged interfaces can only belong to one VLAN.
In the Default VLAN, you cannot use the no untagged interface command. To remove an
untagged interface from all VLANs, including the Default VLAN, enter INTERFACE mode and use the
no switchport command.
Related
Commands
● interface vlan — configures a VLAN.
● tagged — specifies which interfaces in a VLAN are tagged.
Far-End Failure Detection (FEFD)
The Dell Networking operating software supports far-end failure detection (FEFD) on the Ethernet interfaces.
The FEFD feature detects and reports far-end link failures.
● FEFD is not supported on the Management interface.
● During an RPM failover, FEFD is operationally disabled for approximately 8 to 10 seconds.
● By default, FEFD is disabled.
debug fefd
Enable debugging of FEFD.
C9000 Series
Syntax
debug fefd {events | packets} [interface]
To disable debugging of FEFD, use the no debug fefd {events | packets} [interface]
command.
Parameters
events Enter the keyword events to enable debugging of FEFD state changes.
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