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组播VPN技术白皮书 杭州华三通信技术有限公司 www.h3c.com.cn 1页,共19组播VPN技术白皮书 关键词:组播,VPNMDMTIRPF 要:组播VPN是一项在现有BGP/MPLS IP VPN基础上支持组播业务的技术,该技术通过 对私网组播报文进行封装,并将其由各Site间建立的组播隧道进行传递,以完成组播 数据在私网之间的传送。本文介绍了组播VPN的基本概念、实现方案和典型组网应 用。 缩略语: 缩略语 英文全名 中文解释 BGP Border Gateway Protocol 边界网关协议 BSR BootStrap Router 自举路由器 CE Device Customer Edge Device CE设备 CNI Customer Network Interface 私网接口 C-BSR Candidate-BSR 候选BSR C-RP Candidate-RP 候选RP GRE Generic Routing Encapsulation 通用路由封装 IGMP Internet Group Management Protocol 互联网组管理协议 ISP Internet service provider 互联网服务提供商 MD Multicast Domain 组播域 MDT Multicast Distribution Tree 组播分发树 MPLS Multiprotocol Label Switching 多协议标签交换 MSDP Multicast Source Discovery Protocol 组播源发现协议 MT Multicast Tunnel 组播隧道 MTI Multicast Tunnel Interface 组播隧道接口 MVRF Multicast VRF 同时支持单播和组播的VRF NBMA Non-Broadcast Multi-Access 非广播多点可达 P Device Provider Device P设备 PE Device Provider Edge Device PE设备 PNI Provider Network Interface 公网接口

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Huawei Technologies CoSite
VPN
BSR BootStrap Router
CNI Customer Network Interface
C-BSR Candidate-BSR BSR
C-RP Candidate-RP RP
IGMP Internet Group Management Protocol
ISP Internet service provider
MD Multicast Domain
MSDP Multicast Source Discovery Protocol
MT Multicast Tunnel
MVRF Multicast VRF VRF
NBMA Non-Broadcast Multi-Access
PE Device Provider Edge Device PE
PNI Provider Network Interface
VPN
RP Rendezvous Point
VRF VPN Routing and Forwarding VPN
VPN

VPN
PE VPN
(2)
RPF

(4) VPN Site Site
PE Site
PE PE
(5) BGP/MPLS IP VPN

1

PE
(1) MD PE CE
P MD CE P
VPN

VPN
(4) MD PIM VPN PIM
ISP VPN PIM
MDMPLS VPNVPN

“C-” VPN C-Control-Packet C-Data-Packet C-Packet
P-Control-Packet P-Data-Packet P- Packet
MDVPNShare-MDT
PE 2 10.2.2.2/24
P-Data-Packet S = 10.1.1.1 D = 239.1.1.1 Payload = C-Data-Packet
P-Data-Packet S = 10.2.2.2 D = 239.1.1.1 Payload = C-Control-Packet
C-Data-Packet S = 192.1.1.1 D = 225.1.1.1
C-Control-Packet S = 192.2.2.2 D = 224.0.0.13
Receiver
P
MD
C-PacketCEPEPE 3MVRF
P-PacketPE
Share-MDT PE PE IBGP IP
RPF IP Share-MDT Share-Group
MVRF MD MVRF
MD MVRF
2 Share-MDT
2PIM-SMShare-MDT
PE 1 MVRF Share-Group PE 1 RP
*Share-Group *Share-
GroupPE 2 PE 3
PE 1 MVRF PIM PIM PIM Hello
PE 1 P-Data-Packet RP IBGP
S Share-Group
SShare-GroupPE 2 PE 3
MDRPPE 1PE 2PE 3RPT
PERPSPTRPTSPTShare-MDT
2.2.2 PIM
3MDPIM
PE-P PE PIM P PIM
PE-CE PE MVRF PIM CE PIM
PE-PE PE PE MVRF PIM PIM

VPN
MVRFMVRFVPN
SGMVRF*GSGMTI
PE
PNI PE P PNI MVRF
MVRF
MVRF MVRF Site
MTI PE Share-MDT PIMIBGP
MTI up MTI MT /
MD / MVRF MT LAN MVRF
MTI MTI
RPF
5PE 1 CE 1 RPFRPFPE 1
CNIEthernet1/1RPFCE 1
1 MTPE 2PE 2 RPFRPF
PE 2 MTIMTunnel0RPFPE 1
6 RPFMVRF
2.2.5 Share-MDT
PIMEthernet1/2*G
Ethernet1/1CE 1PE 1PE 1
CE 2
2. MVRF
VPNMVRFMVRF
P-Multicast-Data S = 10.1.1.1 D = 239.1.1.1 Payload = C-Multicast-Data
P-Multicast-Data S = 10.2.2.2 D = 239.1.1.1 Payload = C-PIM-Join
C-Multicast-Data S = 192.1.1.1 D = 225.1.1.1
C-PIM-Join S = 192.2.2.2 D = 192.1.1.2
Receiver
P
MD
Interface
Mtunnel0
Neighbor
10.1.1.1
MTI0MTI0Eth1/1
Ethernet1/1
CE 2GCE 2RPCE 1PIMPE 2
P-PacketShare-MDTMDPEPE 3MVRF
CE 1PIMSGPE 1PE 1
P-PacketShare-MDTMDPEPE 3MVRF
CE 2
2.3 Switch-MDT
Share-MDT
2.3.1 Switch-MDT
Switch-Group-Pool Switch-Group Share-
MDT PE Switch-MDT
(2) PE MVRF
PE 2 PE 1 PIM Switch-Group
VPN
Switch-MDT
(3) PE 1 Switch-MDT Switch-Delay
Share-MDT Switch-MDT
2.4 ASMD VPN
2.4.1 ASMD VPN
RFC 4364ASVPNVRF-to-VRF
PE MVRF RPF RPF PE
ASBR ASBR MVRF MT
MD MD PIM
ASBR BGP VPNv4
ASBR PE
P AS IGP AS PE
BGP AS PE PIM
ASBR AS PE
AS PE PIM
ASVPNMD
VRF-to-VRF ASBR VRF PE
MDT AS MDT RPF
AS ASBR MVRF
AS ASBR MVRF AS MDT
—— VPN

MDT AS PE
AS P AS PE
AS MDT ASBR VPNv4
BGP PE VPN RPF
PE
Multi-Hop EBGP VPNv4 BGP
PE VPN RPF
ASMD VPNRPFASMDTPIM
AS 2ASBRPE 3PE 4VPNCE
10 VRF-to-VRF
PE 3VPNASBRMD
AS 2ASBRPE 3PE 4P
VPN
CE 1 PE 1" CE 2PE 2"
PE 4' PE 2'
PE 2PEMulti-hop EBGPASVPN
ASMDASMD
OSPFMPLSPECERIPPE
ASOSPFMPLSPECE
MSDPPIM-SM
4 RFC 4364BGP/MPLS IP Virtual Private Networks (VPNs)
draft-rosen-vpn-mcast-08Multicast in MPLS/BGP IP VPNs
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