3com 5500-ei pwr Instruccion De Instalación
11
To reduce the delay in obtaining the multicast source information, you can cache SA messages on the
router. The number of SA messages cached must not exceed the system limit. The more messages are
cached, the more router memory is occupied.
Configuration Prerequisites
Before you configure SA message transmission, perform the following tasks:
z
Configuring a unicast routing protocol.
z
Configuring basic IP multicast functions.
z
Configuring basic PIM-SM functions.
z
Configuring basic MSDP functions.
Complete the following tasks to configure SA message transmission:
Task
Remarks
Optional
Optional
Optional
Optional
Optional
Configuring RP Address in SA Messages
MSDP peers deliver SA messages to one another. Upon receiving an SA message, a router performs
an RPF check on the message. If the router finds that the remote RP address is the same as the local
RP address, it will discard the SA message. In anycast RP application, however, you need to configure
RPs with the same IP address on two or more routers in the same PIM-SM domain, and configure these
RPs as MSDP peers to one another. Therefore, a logic RP address (namely the RP address on a logic
interface) that is different from the actual RP address must be designated for SA messages so that the
messages can pass the RPF check.
Follow these steps to configure RP address in SA messages:
To do...
Use the command...
Remarks
Enter system view
system-view
—
Enter MSDP view
msdp
—
Configure the address of the
specified interface as the RP
address in SA messages
specified interface as the RP
address in SA messages
originating-rp interface-type
interface-number
interface-number
Required
By default, the RP address in
SA messages is the RP
address configured for PIM.
SA messages is the RP
address configured for PIM.
In Anycast RP application, a C-BSR and a C-RP must be configured on different devices or ports.