R3721-F3210-F3171-HP High-End Firewalls Network Management Configuration Guide-6PW101

Table Of Contents
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NOTE:
Each device can have only one interface serving as the MLD proxy interface.
You cannot enable MLD on interfaces with MLD proxying enabled. Moreover, only the mld
require-router-alert, mld send-router-alert, and mld version commands can take effect on such
interfaces.
You cannot enable other IPv6 multicast routing protocols (such as IPv6 PIM-DM or IPv6 PIM-SM) on
interfaces with MLD proxying enabled, or vice versa. However, the source-lifetime, source-policy, and
ssm-policy commands configured in IPv6 PIM view can still take effect.
Configuring IPv6 multicast forwarding on a downstream
interface
Only queriers can forward IPv6 multicast traffic but non-queriers have no forwarding capabilities, to
avoid duplicate multicast flows. It is the same on MLD proxy devices. Only the downstream interfaces
acting as a querier can forward IPv6 multicast traffic to downstream hosts.
However, when a downstream interface of a proxy device fails to win the querier election, you need to
enable IPv6 multicast forwarding on this interface.
To enable IPv6 multicast forwarding on a downstream interface
Ste
p
Command
Remarks
1. Enter system view.
system-view N/A
2. Enter interface view.
interface interface-type
interface-number
N/A
3. Enable IPv6 multicast forwarding
on a non-querier downstream
interface.
mld proxying forwarding Disabled by default.
CAUTION:
On a multi-access network with more than one MLD proxy devices, you cannot enable IPv6 multicast
forwarding on any other non-querier downstream interface after one of the downstream interfaces of
these MLD proxy devices has been elected as the querier. Otherwise, duplicate multicast flows mi
g
ht be
received on the multi-access network.
Displaying and maintaining MLD
Task Command Remarks
Display MLD group information.
display mld group [ ipv6-group-address | interface
interface-type interface-number ] [ static | verbose ] [ |
{ begin | exclude | include } regular-expression ]
Available in
any view
Display information about the
hosts tracked by MLD on an
interface.
display mld host interface interface-type interface-number
group ipv6-group-address [ source ipv6-source-address ]
[ | { begin | exclude | include } regular-expression ]
Available in
any view