3Com MSR 50 Series, Руководство по настройке

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Configuring IPv6 PIM Common Information 1259
Configuring an IPv6 PIM
filter
No matter in an IPv6 PIM-DM domain or an IPv6 PIM-SM domain, routers can
check passing-by IPv6 multicast data based on the configured filtering rules and
determine whether to continue forwarding the IPv6 multicast data. In other
words, IPv6 PIM routers can act as IPv6 multicast data filters. These filters can help
implement traffic control on one hand, and control the information available to
downstream receivers to enhance data security on the other hand.
Follow these steps to configure an IPv6 PIM filter:
n
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Generally, a smaller distance from the filter to the IPv6 multicast source results
in a more remarkable filtering effect.
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This filter works not only on independent IPv6 multicast data but also on IPv6
multicast data encapsulated in register messages.
Configuring IPv6 PIM
Hello Options
No matter in an IPv6 PIM-DM domain or an IPv6 PIM-SM domain, the hello
messages sent among routers contain many configurable options, including:
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DR_Priority (for IPv6 PIM-SM only): priority for DR election. The higher the
priority is, the easier it is for the router to win DR election. You can configure
this parameter on all the routers in a multi-access network directly connected
to IPv6 multicast sources or receivers. For details, refer to the description of
hello-option dr-priority command in the Command Manual.
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Holdtime: the timeout time of IPv6 PIM neighbor reachability state. When this
timer times out, if the router has received no hello message from an IPv6 PIM
neighbor, it assumes that this neighbor has expired or become unreachable.
You can configure this parameter on all routers in the IPv6 PIM domain. If you
configure different values for this timer on different IPv6 PIM neighbors, the
largest value will take effect. For details, refer to the description of
hello-option holdtime command in the Command Manual .
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LAN_Prune_Delay: the delay of prune messages on a multi-access network.
This option consists of Lan-delay (namely, prune delay), Override-interval, and
neighbor tracking flag bit. You can configure this parameter on all routers in
the IPv6 PIM domain. If different LAN-delay or override-interval values result
from the negotiation among all the IPv6 PIM routers, the largest value will take
effect. For details, refer to the description of
hello-option lan-delay
command in the Command Manual .
The LAN-delay setting will cause the upstream routers to delay processing received
prune messages. If the LAN-delay setting is too small, it may cause the upstream
router to stop forwarding IPv6 multicast packets before a downstream router
sends a prune override message. Therefore, be cautious when configuring this
parameter.
To do... Use the command... Remarks
Enter system view system-view -
Enter IPv6 PIM view pim ipv6 -
Configure an IPv6 multicast
group filter source-policy acl6-number Required
No IPv6 multicast data filter by
default