Enabling Dropping Unknown Ipv6 Multicast Data; Enabling Mld Report Suppression - HP MSR2003 Configuration Manual

Enabling dropping unknown IPv6 multicast data

CAUTION:
For MSR routers installed with the Layer 2 switching module SIC 4GSW or SIC 4GSWP, unknown IPv4
multicast data will be dropped if you enable dropping unknown IPv6 multicast data on them.
Unknown IPv6 multicast data refers to IPv6 multicast data for which no forwarding entries exist in the MLD
snooping forwarding table. When the Layer 2 device receives such multicast data, one of the following
occurs:
• When the function of dropping unknown IPv6 multicast data is disabled, the Layer 2 device floods
unknown IPv6 multicast data in the VLAN to which the data belongs.
When the function of dropping unknown IPv6 multicast data is enabled, the Layer 2 device drops
•
all received unknown IPv6 multicast data.
To enable dropping unknown IPv6 multicast data for a VLAN:
Step
1. Enter system view.
2. Enter VLAN view.
3. Enable
IPv6 multicast data for the
VLAN

Enabling MLD report suppression

This feature is supported on the following hardware:
MSR routers installed with the Layer 2 switching module HMIM 24GSW, HMIM 24GSW-POE, or HMIM
8GSW.
When a Layer 2 device receives an MLD report from an IPv6 multicast group member, the Layer 2 device
forwards the report to the directly connected Layer 3 device. If multiple members of an IPv6 multicast
group are attached to the Layer 2 device, the Layer 3 device might receive duplicate MLD reports for the
same group.
When the MLD report suppression function is enabled, the Layer 2 device within a query interval
forwards only the first MLD report for the IPv6 multicast group to the Layer 3 device. It does not forward
subsequent MLD reports for the same IPv6 multicast group to the Layer 3 device, which reduces the
number of packets being transmitted over the network.
To enable MLD report suppression:
Step
1. Enter system view.
2. Enter MLD-snooping view.
3. Enable
suppression.
Command
system-view
vlan vlan-id
dropping unknown
mld-snooping drop-unknown
Command
system-view
mld-snooping
MLD report
report-aggregation
233
Remarks
N/A
N/A
By default, this function is disabled.
Unknown IPv6 multicast data is
flooded.
Remarks
N/A
N/A
By default, MLD report suppression
is enabled.