3Com 8807 Configuration Manual page 450

450 C 42: IGMP C
HAPTER
Enabling/Disabling IGMP
Fast Leave
ONFIGURATION
packets and the ACL rule bound to the VLAN, the switch determines whether to
discard the packets or let them pass.
By setting the filtering rule of multicast groups in the VLAN, you can control access
to IP multicast groups. You can only configure one ACL rule for each VLAN, and
the new configured rule will replace the old one.
Perform the following configuration in VLAN view.
Table 444 Configure the aging time of multicast group members
Operation
Set the filtering rule of multicast groups in the
specified VLAN
Cancel the filtering rule of multicast groups in
the specified VLAN
By default, no filtering rule is set for a VLAN. In this case, a host can be joined to
any multicast group.
c
CAUTION:
If an inexistent acl-number is bound to the VLAN, or if the bound acl-number is
■
not configured with a rule, a host is still allowed to join any multicast group.
The multicast group filtering rule is not restricted by the ACL itself, and is valid
■
for all members in the specified VLAN.
An IGMP-enabled Layer 3 switch does not query packets of the specific multicast
group to a fast leave-enabled port any longer when the port receives an IGMP
leave packet. Instead, the switch removes the port from the outbound port lists of
all Layer 3 multicast forwarding tables that are of the same multicast group to peel
off the port from the multicast group. That is, the switch does not send specific
query packet to the port or forward multicast data to the port.
Perform the following configuration in Ethernet port view or system view.
Table 445 Enable/Disable IGMP fast leave
Operation
Enter system view
Enable IGMP fast leave in
system view
Enter Ethernet port view
Enable IGMP fast leave in
Ethernet port view
Disable IGMP fast leave
For detailed configuration, refer to the 3Com Switch 8800 Family Series Routing
Switches Command Manual.
n
Command
igmp-snooping group-policy acl-number
undo igmp-snooping group-policy
Command
system-view
igmp fast-leave [ vlan { vlan-id [ to
vlan-id ] } &<1-10> ]
interface interface-type
interface-number
igmp fast-leave [ vlan { vlan-id [ to
vlan-id ] } &<1-10> ]
undo igmp fast-leave [ vlan {
vlan-id [ to vlan-id ] } &<1-10> ]
Remarks
-
IGMP fast leave is
disabled by default
-
IGMP fast leave is
disabled by default
-