Configuring A Rule For Filtering Received And Forwarded Sa Messages - Huawei Quidway S3900 Series Operation Manual

Operation Manual – Multicast Protocol
Quidway S3900 Series Ethernet Switches-Release 1510
Operation
Configure
multicast
using SA messages

8.4.4 Configuring a Rule for Filtering Received and Forwarded SA Messages

Besides the creation of source information, controlling multicast source information
allows you to control the forwarding and reception of source information. You can
control the reception of SA messages using the MSDP inbound filter (corresponding to
the import keyword); you can control the forwarding of SA messages by using either
the MSDP outbound filter (corresponding to the export argument) or the TTL threshold.
By default, an MSDP peer receives and forwards all SA messages.
MSDP inbound/outbound filter implements the following functions:
Filtering out all (S, G) entries
Receiving/forwarding only the SA messages permitted by advanced ACL rules
(You can configure ACL rules for filtering source IP addresses and group IP
addresses.)
An SA message carrying encapsulated data can reach the specified MSDP peer
outside the domain only when the TTL in its IP header exceeds the threshold; therefore,
you can control the forwarding of SA messages that carry encapsulated data by
configuring the TTL threshold.
Table 8-10 Configure a rule for filtering received and forwarded SA messages
Operation
Enter system view
Enter MSDP view
Configure
imported and exported
SA messages
Command
to filter
import-source
sources
acl-number ]
Command
system-view
msdp
to filter peer
sa-policy
export } [ acl acl-number ]
Huawei Technologies Proprietary
8-14
Chapter 8 MSDP Configuration
Optional
You can configure the rule
for filtering related multicast
[ acl group IP addresses in ACL.
By default, all the (S, G)
entries in the domain are
advertised
message.
—
—
Optional
By default, no filtering is
peer-address
imposed on SA messages to
{ import |
be received or forwarded,
namely all SA messages
from
received or forwarded.
Description
in the SA
Description
MSDP peers are