Brocade FastIron Ethernet Switch Administration Guide - Manual (Page 77)

Syntax: [no] voice-vlan voice-vlan-num
where voice-vlan-num is a valid VLAN ID between 1 - 4095.
To remove a voice VLAN ID, use the no form of the command.
Viewing voice VLAN configurations
You can view the configuration of a voice VLAN for a particular port or for all ports.
To view the voice VLAN configuration for a port, specify the port number with the show voice-vlan
command. The following example shows the command output results.
device# show voice-vlan ethernet 2
Voice vlan ID for port 2: 1001
The following example shows the message that appears when the port does not have a configured
voice VLAN.
device# show voice-vlan ethernet 2
Voice vlan is not configured for port 2.
To view the voice VLAN for all ports, use the show voice-vlan command. The following example shows
the command output results.
device# show voice-vlan
Port ID Voice-vlan
2 1001
8 150
15 200
Syntax: show voice-vlan [ ethernet port ]
Port flap dampening configuration
Port Flap Dampening increases the resilience and availability of the network by limiting the number of
port state transitions on an interface.
If the port link state toggles from up to down for a specified number of times within a specified period,
the interface is physically disabled for the specified wait period. Once the wait period expires, the port
link state is re-enabled. However, if the wait period is set to zero (0) seconds, the port link state will
remain disabled until it is manually re-enabled.
Port flap dampening configuration notes
• When a flap dampening port becomes a member of a trunk group, that port, as well as all other
member ports of that trunk group, will inherit the primary port configuration. This means that the
member ports will inherit the primary port flap dampening configuration, regardless of any previous
configuration.
• The Brocade device counts the number of times a port link state toggles from "up to down", and not
from "down to up".
• The sampling time or window (the time during which the specified toggle threshold can occur before
the wait period is activated) is triggered when the first "up to down" transition occurs.
• "Up to down" transitions include UDLD-based toggles, as well as the physical link state.
Viewing voice VLAN configurations
FastIron Ethernet Switch Administration Guide 77
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