05_01_使用Cisco IOS平台的MPLS VPN机制

2019年7月27日 06:42 作者：金淼淋分类：MPLS  661

MPLS VPN Implementation
YES LAB
Using MPLS VPN Mechanisms of Cisco
IOS Platforms
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YES LAB
wwwveslabnet Outline
YES LAB
— Overview
- What Is a VRFTable?
— What Are VPN-Aware Routing Protocols?
- How Are VRFTables Used?
— Propagating BGP Routes—Outbound
— Propagating Routes—lnbound
— Propagating Non-BGP Routes—Outbound
— Propagating Non-BGP Routes—lnbound
— Summary
wwwveslabnet VRF Table
YES LAB
— Analogous to standard Cisco IOS software routing table;
supports same set of
— VPN interfaces (physical interface, subinterfaces, logical
interfaces) assigned to VRFs
• Many interfaces perVRF—
• Each interface assignable to only one VRF—
+—+VRF
wwwveslabnet BGP Route Propagation—Outbo
YES LAB
PE Router
BGP Routing process
VRF-A Routing Table
Backbone
Multiprotocol
BGP
VRF-B Routing Table
Instance for VRF-A
CE-BGP-A
Instance for VRF-B
CE-BGP-B
Two VPNs are attached to the same PE router.
• Each VPN is represented by a VRF.
w»wveslabnet BGP Route Propagation—lnbound
(Cont.)
YES LAB
BGP Routing process
VRF-A Routing Table
Backbone
Multiprotocol
BGP
VRF-B Routing Table
Instance for VRF-A
CE.BGP-A
nstance for VRF-B
CE-BGP-B
Routes are received from backbone MP-BGP and imported into a VRF.
• IPv4 routes are forwarded to EBGP CE neighbors attached to that VRF.
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wwwveslabnet Non-BGP Route Propagation—lnboun
RIP Routing process
Instance for VRF-A
CE.RIP.A
Instance for VRF
CE-RIP.B
Instance for VRF-A
Instance for VRF-B
(Cont.)
VRF-A Routing Tame
VRF-B Routing Tame
YES LAB
BGP Routing process
Backbone
Multiprotocol
BGP
• Routes redistributed from BGP into a VRF instance Of RIP are sent to RIP-speaking CE routers.
wwwveslabnet