H3C S9500 Series Operation Manual

Also see for S9500 Series: Operation manual Operation manual Operation manual Operation manual Operating manual

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Operation Manual – Multicast ProtocolH3C S9500 Series Routing Switches Chapter 8 MSDP Configuration8-9Operation CommandRemove the configuration of filtering SArequest messagesundo peer peer-addresssa-request-policyBy default, only the routers which caches SA messages can respond to SA requestmessages. Routers receive all SA request messages from its MSDP peers.Multicast group addresses are described in ACL. If no ACL is specified, all SA requestmessages sent by the corresponding MSDP peer will be ignored. If an ACL is specified,only SA request messages of the groups permitted by the ACL will be processed.8.2.9 Controlling the Source Information ForwardedControlling of source information also includes that of forwarding and receiving sourceinformation besides that of creating source information. The outbound filter or time tolive (TTL) threshold of SA messages can be used to control the SA message forwarding.By default, all SA messages are forwarded to other MSDP peers.I. Using MSDP outbound filterMSDP outbound filter of are functional in:z Filtering off all the (S, G) entriesz Forwarding only the SA messages permitted by the advanced ACLPlease perform the following configurations in MSDP view.Table 8-10 Using MSDP outbound filter to control the source information forwardedOperation CommandFilter off all the SA messages to a specifiedMSDP peerpeer peer-address sa-policyexportForward the SA messages permitted by theadvanced ACL to a specified MSDP peerpeer peer-address sa-policyexport acl acl-numberRemove the filtering over the sourceinformation forwardedundo peer peer-addresssa-policy exportII. Using TTL to filter SA messages with encapsulated dataAn SA message with encapsulated data can reach the specified MSDP peer only whenthe TTL in its IP header is no less than the threshold. Therefore, the forwarding of SAmessages with encapsulated data can be controlled by configuring the TTL threshold.For example, you can set the TTL threshold for intra-domain multicast traffic as 10 ifyou wish to restrict SA messages with TTL less than or equal to 10 carryingencapsulated data from being propagated. If you set the TTL threshold greater than 10,then they can be propagated to outside.