Configuring Sa Message Cache; Configuring The Transmission And Filtering Of Sa Request Messages - H3C S5600 Series Operation Manual

Operation Manual – Multicast
H3C S5600 Series Ethernet Switches
Note:
In Anycast RP application, a C-BSR and a C-RP must be configured on different
devices or ports.

5.4.3 Configuring SA Message Cache

With the SA message caching mechanism enabled on the router, the group that a new
member subsequently joins can obtain all active sources directly from the SA cache
and join the corresponding SPT source tree, instead of waiting for the next SA
message.
You can configure the number of SA entries cached in each MSDP peer on the router
by executing the following command, but the number must be within the system limit.
To protect a router against Denial of Service (DoS) attacks, you can manually configure
the maximum number of SA messages cached on the router. Generally, the configured
number of SA messages cached should be less than the system limit.
Follow these steps to configure SA message cache:
Enter system view
Enter MSDP view
Enable SA message
caching mechanism
Configure the maximum
number of SA messages
that can be cached

5.4.4 Configuring the Transmission and Filtering of SA Request Messages

After you enable the sending of SA request messages, when a router receives a Join
message, it sends an SA request message to the specified remote MSDP peer, which
responds with an SA message that it has cached. After sending an SA request
message, the router will get immediately a response from all active multicast sources.
The SA message that the remote MSDP peer sends in response is cached in advance;
therefore, you must enable the SA message caching mechanism in advance. Typically,
only the routers caching SA messages can respond to SA request messages.
After you have configured a rule for filtering received SA messages, if no ACL is
specified, all SA request messages sent by the corresponding MSDP peer will be
ignored; if an ACL is specified, the SA request messages that satisfy the ACL rule are
received while others are ignored.
To do...
system-view
msdp
cache-sa-enable
peer peer-address
sa-cache-maximum
sa-limit
Use the command...
5-14
Chapter 5 MSDP Configuration
Remarks
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—
Optional
Enabled by default
Optional
The default is 2,048.