3Com Switch 8800 Configuration Guide Chapter 31 MBGP Multicast Extension Configuration31-1031.2.10 Configure MBGP Community AttributesWithin the MBGP, a community is a set of destinations with some characteriestics incommon. 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.31.2.11 Importing IGP Routing Information into MBGPMBGP can advertise intra-area netwrok informaiton to other ASs. To this end, you canuse MBGP to advertise the intra-area network information that local router gets throughIGP routing protocol.Please perform the following configurations in IPV4 multicast sub-address family view.Table 31-13 Importing IGP routing informationOperation CommandImport IGP Routing Information intoMBGPimport-route protocol [ route-policypolicy-name ] [ med med-value ]Delete the imported IGP routinginformation undo import-route protocolBy default, MBGP does not import any route of other protocols.Parameter Protocol specifies the source routing protocols of import, which can bedirect, static, rip, isis, ospf, ospf-ase or ospf-nssa at present.31.2.12 Defining AS Path List and Routing PolicyTo configure AS path list and routing polity you need to:z Configure the regular expression of autonomous systems (in system view);The UPDATE information of MBGP contains an AS_PATH domain. The autonomoussystem paths for MBGP routing information exchange is recorded in this domain.z Define the routing policy (in system view);z Define matching rules (in routing policy view);z Define value assigning rules (in routing policy view)For the detailed configuration of regular expression of AS, refer to “BGP Configuration”(section 6.2.4) of the Routing Protocol part of this manual. For the other configuration,refer to the “IP Routing Policy Configuration” of the Routing Protocol part of thismanual.31.2.13 Configuring MBGP Route FilteringThe route filtering configuration of MBGP is the same as that of unicast BGP.For details, refer to “BGP Configuration” of the Routing Protocol part of this manual.
