3com 8807 User Guide

C

HAPTER

 46: MBGP M

ULTICAST

 E

XTENSION

 C

ONFIGURATION

multicast networks are very large, and it costs a good sum to establish a 
fully-closed network.

Route reflector solves this problem. The core is to specify a router as the focus of 
the internal sessions. Multiple MBGP multicast routers can be peers of one central 
point, namely a multiple route reflector, which in turn creates peer relationship 
with other reflectors. The route reflector is the focus of other routers. The routers 
other than those reflectors are called clients. The clients are in peer with route 
reflects and exchange routing information with them. The route reflectors transfer 
(reflect) information between the clients in turn.

For the details of the principles and configurations, refer to "BGP Configuration" 
of the Routing Protocol part.

Within the MBGP, a community is a set of destinations with some characteristics in 
common. A community is not limited to a network or an AS has no physical 
boundary.

For details, refer to "BGP Configuration" in the Routing Protocol part.

MBGP can advertise intra-area network information to other ASs. To this end, you 
can use MBGP to advertise the intra-area network information that local router 
gets through IGP routing protocol.

Please perform the following configurations in IPV4 multicast sub-address family 
view.

By default, MBGP does not import any route of other protocols.

Parameter Protocol specifies the source routing protocols of import, which can be 
direct, static, rip, isis, ospf, ospf-ase or ospf-nssa at present.

To configure AS path list and routing polity you need to:

■

Configure the regular expression of autonomous systems (in system view);

The UPDATE information of MBGP contains an AS_PATH domain. The 
autonomous system paths for MBGP routing information exchange is recorded in 
this domain.

■

Define the routing policy (in system view);

■

Define matching rules (in routing policy view);

■

Define value assigning rules (in routing policy view)

Table 495   Import IGP routing information

Import IGP Routing Information into MBGP 

import-route protocol [ route-policy 
policy-name ] [ med med-value ] 

Delete the imported IGP routing information 

undo import-route protocol