3Com S7902E, Руководство по настройке

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Maximum number of (S, G) entries in a join/prune message
Configuring a Multicast Data Filter
No matter in a PIM-DM domain or a PIM-SM domain, routers can check passing-by multicast data
based on the configured filtering rules and determine whether to continue forwarding the multicast data.
In other words, PIM routers can act as multicast data filters. These filters can help implement traffic
control on one hand, and control the information available to receivers downstream to enhance data
security on the other hand.
Follow these steps to configure a multicast data filter:
To do... Use the command... Remarks
Enter system view system-view —
Enter public instance PIM view
or VPN instance PIM view pim [ vpn-instance
vpn-instance-name ]
—
Configure a multicast group
filter
source-policy acl-number
Required
No multicast data filter by
default
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Generally, a smaller distance from the filter to the multicast source results in a more remarkable
filtering effect.
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This filter works not only on independent multicast data but also on multicast data encapsulated in
register messages.
Configuring a Hello Message Filter
Along with the wide applications of PIM, the security requirement for the protocol is becoming more and
more demanding. The establishment of correct PIM neighboring relationships is the prerequisite for
secure application of PIM. You can configure a legal source address range for hello messages on
interfaces of routers to ensure the correct PIM neighboring relationships, and thus to guard against PIM
message attacks.
Follow these steps to configure a hello message filter:
To do… Use the command… Remarks
Enter system view system-view —
Enter interface view
interface interface-type
interface-number
—
Configure a hello message filter pim neighbor-policy acl-number
Required
No hello message filter by
default.