MPLS design. Massimiliano Sbaraglia

Transcription

1 MPLS design Massimiliano Sbaraglia

2 - MPLS layer 2 VPN diagram flowchart - MPLS layer 2 VPN pseudowire VPWS diagram - MPLS layer 2 VPN VPLS diagram - MPLS layer 2 EVPN diagram - MPLS layer 3 VPN diagram protocols - MPLS layer 3 VPN Hub and Spoke diagram! - MPLS SeamLess model diagram 1 - MPLS SeamLess model diagram 2 - MPLS SeamLess model diagram 3 - MPLS SeamLess model diagram 4 - MPLS SeamLess model diagram 5 INDICE

3 MPLS layer 2 VPN diagram flowchart L2 VPN Virtual Private Wire Services Virtual Private Lan Services VPWS VPLS Point-to-Point Multi-Point Services circuit layer 2 payload carrier Frame Relay ATM AAL5 PPP HDLC Ethernet Ethernet

4 MPLS layer 2 VPN Pseudowire VPWS diagram No Loop prevention because we have P2P connection No need MAC address to Pseudowire binding LAN RED Only one Egress Point to Pseudowire LAN RED Sw1 pseudowire pink pseudowire red Sw3 PE1 MPLS + LDP or RSVP P MPLS + LDP or RSVP PE2 Sw2 LSP Label Switched Path Sw4 LAN PINK LAN PINK

5 MPLS layer 2 VPN VPLS diagram Learning of PE in the same VPN is possible via «auto-discovery» if the number of PE is too much high; auto-discovery is achivied via radius server or via BGP Kompella signaling Loop Prevention via Split-Horizon rule (enable by default on the Core Network) NO STP in the Core MPLS Services Provider LAN RED = Virtual Forwardind Instance Full-Mesh Pseudowire is necessary PE keep MAC address of the customer learned via data-plane LAN RED Need MAC address to Pseudowire binding PE1 PW-12 RED PW-12 PINK MPLS VPLS Backbone PE2 LAN PINK PW-13 PINK PW-13 RED PW-23 RED LAN PINK PW-23 PINK PE3 ETH circuit ETH circuit LAN RED LAN PINK

6 MPLS layer 2 EVPN diagram Customer can be dual-homed to the same or different PE with either links used on active-standby mode for all vlan or Vlan-based load balanced can be achivied VPLS not permitted active-active flow based LAN RED PE1 MPLS + MP-BGP PE2 MPLS + MP-BGP MPLS + MP-BGP MAC address learned via Data Plane PE3 MAC addresses are advertised over MP-BGP Control Plane PE4 MAC address learned via Data Plane EVPN support active-active flow-based load balancing and the same vlan can be used on both PE devices actively EVPN support fast convergence in customer links, PE links and/or node failure scenario

7 MPLS layer 3 VPN diagram IGP routing QoS MP-iBGP (Router Reflecor) IPv6 address family MDT Multicast address family via GRE tunnels VPNv4 unicast address family IPv4 unicast address family VRF-A RT Route Target (import-export VRF Leaking)) RD Route Distinguisher (customer address prefix) VRF-A VPN-A VPN-B CE1 IGP or BGP or static VRF-B PE1 MPLS + LDP or RSVP LSP Label Switched Path P MPLS + LDP or RSVP VRF-B PE2 IGP or BGP or static CE2 VPN-A VPN-B Inner-Label (BGP Label) VRF-A Egress-Label (TopMost Label) VRF-A Inner-Label (BGP Label) Egress-Label (TopMost Label) VRF-B VRF-B MPLS Backbone

8 MPLS layer 3 VPN Hub and Spoke diagram Spokes imports the Hub RT value but not the other Spokes RT value Hub imports all the Spokes RT value On Hub and Spoke different RT value are configured VPN-A Spoke1 PE1 VRF-A RT A import RT C MPLS LSP import RT C VRF-B RT B PE2 Spoke2 VPN-B MPLS LSP import RT A import RT B VRF-C RT C MPLS LSP VRF A VRF B To HUB PE3 VRF C To SPOKE HUB VPN-C

9 SEAMLESS MPLS model diagram 1 SEAMLESS MPLS Domain Aggregation Core Aggregation Domain NO MPLS IP Ethernet TDM based NO MPLS IP Ethernet TDM based Domain With Single AS multi-area Seamless MPLS, IBGP labeled unicast is used to build inter-domain LSP With Inter AS Seamless MPLS, IBGP labeled unicast is used to build inter-domain LSP inside the AS EBGP labeled unicast is used to extend the end-to-end LSP across the AS boundary NO hierarchical BGP LSP (BGP Labeled RFC 3107) Compatible with small network of core-aggregation node integrated in a single IGP/LDP domain (less than 500 or 1000 nodes)

10 SEAMLESS MPLS model diagram 2 SEAMLESS MPLS Domain Aggregation Core Aggregation Hierarchical IBGP Different IGP from Aggregation Core Domain Different IGP from Aggregation Core Domain With Single AS multi-area Seamless MPLS, IBGP labeled unicast is used to build inter-domain LSP With Inter AS Seamless MPLS, IBGP labeled unicast is used to build inter-domain LSP inside the AS EBGP labeled unicast is used to extend the end-to-end LSP across the AS boundary Compatible with small network of core-aggregation node integrated in a single IGP/LDP domain (less than 500 or 1000 nodes)

11 SEAMLESS MPLS model diagram 3 SEAMLESS MPLS Domain Aggregation Core Core Aggregation NO MPLS IP Ethernet TDM based NO MPLS IP Ethernet TDM based Hierarchical IBGP Different IGP from Core Domain Different IGP from Core Domain

12 SEAMLESS MPLS model diagram 4 SEAMLESS MPLS Domain Aggregation ABR with BGP NHP Core Core Aggregation Hierarchical IBGP

13 SEAMLESS MPLS model diagram 5 SEAMLESS MPLS Domain Aggregation ABR with BGP NHP Core Core Aggregation Loopback access addresses are redistributed into the network domain redistribution redistribution Loopback access addresses are redistributed into the network domain redistribution redistribution NO BGP NO BGP Hierarchical IBGP