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Version Description
7.5.1.0 Introduced on the C-Series.
pre-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 of the S4820T platform.
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.
S4820T
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.
packets Enter the keyword packets to enable debugging of FEFD to
view information on packets sent and received.
interface (OPTIONAL) Enter the following keywords and slot/port or
number information:
Layer 2
1135