Cisco Systems 78-11741-02 Wireless Office Headset User Manual


 
Configuring Multicast Source Discovery Protocol
MSDP Configuration Task List
IPC-486
Cisco IOS IP Configuration Guide
Including a Bordering PIM Dense Mode Region in MSDP
You might have a router that borders a PIM-SM region with a dense mode region. By default, sources in
the dense mode region are not included in MSDP. You could configure this border router to send SA
messages for sources active in the dense mode region. If you do so, it is very important to also configure
the ip msdp redistribute global configuration command to apply to only local sources. Not configuring
this command can result in (S, G) state remaining long after a source in the dense mode domain has
stopped sending.
To configure the border router to send SA messages for sources active in the dense mode region, use the
following command in global configuration mode:
Note The ip msdp border command is not recommended. It is better to configure the border router in the
sparse mode domain to proxy-register sources in the dense mode domain to the RP of the sparse mode
domain and have the sparse mode domain use standard MSDP procedures to advertise these sources.
Configuring an Originating Address Other Than the RP Address
If you want to change the originator ID for any reason, use the ip msdp originator-id global
configuration command in this section. For example, you might change the originator ID in one of these
cases:
If you configure a logical RP on multiple routers in an MSDP mesh group. For an example of a
logical RP, see the section “Logical RP” later in this document.
If you have a router that borders a PIM sparse mode domain and a dense mode domain. If a router
borders a dense mode domain for a site, and sparse mode is being used externally, you might want
dense mode sources to be known to the outside world. Because this router is not an RP, it would not
have an RP address to use in an SA message. Therefore, this command provides the RP address by
specifying the address of the interface.
To allow an MSDP speaker that originates an SA message to use the IP address of its interface as the RP
address in the SA message, use the following command in global configuration mode:
Command Purpose
Router(config)# ip msdp border sa-address type
number
Configures the router on the border between a dense mode and
sparse mode region to send SA messages about active sources
in the dense mode region. The IP address of the interface is used
as the originator ID, which is the RP field in the SA message.
Command Purpose
Router(config)# ip msdp originator-id type number
Configures the RP address in SA messages to be the address of
the originating router’s interface.