Network Study Site

SR TE Policy Automated Steering

2024 May 18

SR TE Policy Automated Steering Segment Routing Automated Steering provides a mechanism to match the BGP color extended community value and the BGP next-hop IP address with a configured Traffic Engineering (TE) policy. In a Layer-3 VPN an egress PE router can ...

MPLS-based EVPN IRB for IPv6

2024 May 12

MPLS-based EVPN IRB for IPv6 A Layer-3 VPN 6VPE solution provides connectivity between IPv6-only sites across an IPv4-only MPLS core network. EVPN IRB together with Segment Routing delivers multiple benefits compared to MPLS 6VPE VPNv6 with LDP/RSVP ...

OSPF Down Bit in MPLS L3VPN

2024 Apr 22

OSPF Down Bit in MPLS L3VPN A Provider Edge (PE) router in an MPLS Layer-3 VPN sets the OSPF Down bit (DN bit) for prefixes advertised to a Customer Edge (CE) router. The DN bit is part of the OSPF options field in a Type-3 LSA. In case a CE is connected to two PE routers ...

FlexVPN Spoke-to-Spoke Routing

2024 Apr 16

FlexVPN Spoke-to-Spoke Routing FlexVPN allows for a variety of network designs including hub-and-spoke topologies. Direct spoke-to-spoke communication can be configured with FlexVPN. In such a scenario, spoke routers dynamically form IPSec ...

FlexVPN IKEv2 Routing

2024 Apr 15

OSPF Stub Router FlexVPN is a framework to establish point-to-point encrypted tunnels with IKEv2. FlexVPN is a route-based VPN technology, and enables a variety of network designs such as site-to-site, hub-and-spoke or remote access connections ...

EVPN Multihoming

2024 Apr 14

EVPN Multihoming EVPN MPLS multihoming enables deploying two Provider Edge (PE) routers connected to a single Customer Edge (CE) device. Such a redundant design improves resiliency to network failures and introduces new EVPN Route Types during its operation ...

Hierarchical VPLS

2024 Apr 13

Hierarchical VPLS H-VPLS is a variation of VPLS that introduces a tiered design. Two domains are created to form a hierarchical L2VPN. The core network domain uses traditional VPLS discovery and signaling mechanisms with the interoperation of MPLS, targeted LDP ...

Segment Routing Mapping Server

2024 Jan 12

Segment Routing Mapping Server A Segment Routing (SR) Mapping Server provides prefix-to-SID mapping information to routers configured with SR, so that these devices can communicate with routers using only LDP. A Mapping Server works in the control plane ...

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