IronPort Systems 4108GL - Manual (Page 365)

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Multimedia Traffic Control with IP Multicast (IGMP)
How IGMP Operates
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Configuration Options for Forced Fast-Leave
N o t e o n V L A N
N u m b e r s : In the HP Procurve Switch 4108GL, the walkmib and setmib commands use an internal
VLAN number (and not the VLAN ID, or VID) to display or change many per-vlan features,
such as the Forced Fast-Leave state. Because the internal VLAN number for the default
VLAN is always 1 (regardless of whether VLANs are enabled on the switch), and because
a discussion of internal VLAN numbers for multiple VLANs is beyond the scope of this
document, the discussion here concentrates on examples that use the default VLAN.
Listing the Forced Fast-Leave Configuration
The Forced Fast-Leave configuration data is available in the switch’s MIB
(Management Information Base), and includes the state (enabled or disabled)
for each port and the Forced-Leave Interval for all ports on the switch.
To List the Forced Fast-Leave State for all Ports in the Switch. Go to
the switch’s command prompt and use the walkmib command, as shown below.
1. From the Main Menu, select:
5. Diagnostics . . .
4. Command Prompt
2. Do one of the following:
• If VLANs are not enabled on the switch, go to step 3.
• If VLANs are enabled on the switch:
i. You will be prompted to select a VLAN. For example:
ii. Because you can list the Forced Fast-Leave state for all ports on
the switch from any VLAN, just press
[Enter] to select the displayed
VLAN.
3. Enter either of the following walkmib command options:
walkmib hpSwitchIgmpPortForcedLeaveState
Feature Default Settings Function
Forced Fast-
Leave state 2
(disabled) 1 (enabled)
2 (disabled) Uses the setmib command to enable or disable
Forced Fast-Leave on individual ports. When
enabled on a port, Forced Fast-Leave operates only
if the switch detects multiple end nodes (and at
least one IGMP client) on that port.