Establishing The Configuration Task; Configuring The Maximum Number Of (S, G) Entries In The Cache - Huawei Quidway s3700 series Configuration Manual

Quidway S3700 Series Ethernet Switches
Configuration Guide - Multicast

8.6.1 Establishing the Configuration Task

After PIM-SM inter-domain multicast or anycast RP in a PIM-SM domain is configured, you
can configure an SA cache as required.
Applicable Environment
By default, SA Cache is enabled on switchs on which MSDP peers are configured. The
switchs can locally store the (S, G) information carried in SA messages. When the switchs need
to receive (S, G) information, the switchs can obtain the (S, G) information from the SA Cache.
Setting the maximum number of (S, G) entries can prevent the Denial of Service (DoS) attack.
Users can disable the SA Cache of a switch. After the SA Cache of a switch is disabled, the
switch does not locally store the (S, G) information carried in SA messages. When a switch
wants to receive (S, G) data, it needs to waits for the SA message to be sent by its MSDP peer
in the next period. This delays receivers from obtaining multicast data.
Pre-configuration Tasks
Before configuring SA Cache, complete the following tasks:
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Data Preparation
To configure SA Cache, you need the following data.
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8.6.2 Configuring the Maximum Number of (S, G) Entries in the
Cache
Setting the maximum number of (S, G) entries in an SA cache can prevent DoS attacks.
Context
Do as follows on the switch on which the MSDP peer is configured:
Issue 01 (2011-10-26)
Configuring a unicast routing protocol to implement interconnection at the network layer
Enabling IP multicast
Configuring a PIM-SM domain to implement intra-domain multicast
Configuring PIM-SM Inter-domain Multicast
PIM-SM Domain
Data
Maximum number of (S, G) entries in the SA Cache
NOTE
If the configuration is not done, default values are used.
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8 MSDP Configuration
or Configuring an Anycast RP in a
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