Network Study Site

Segment Routing TI-LFA

2024 Jan 10

Segment Routing TI-LFA Segment Routing Topology Independent Loop Free Alternate (TI-LFA) is a local repair feature configured on a router in order to calculate an available backup path. TI-LFA works with failures on a directly connected link and provides link, node and SRLG protection ...

Segment Routing with IS-IS

2024 Jan 9

Segment Routing with IS-IS Segment Routing (SR) is a source routing protocol that uses extensions to IS-IS in order to advertise Segment IDs (SID) in an IGP domain. Deployed in an MPLS network, the SR control plane can replace LDP and RSVP to advertise prefix-to-label bindings ...

Segment Routing with OSPF

2024 Jan 6

Segment Routing with OSPF Segment Routing (SR) is a source routing protocol that uses extensions to OSPF in order to advertise Segment IDs (SID) in an IGP domain. Deployed in an MPLS network, the SR control plane can replace LDP and RSVP to advertise prefix-to-label bindings ...

Virtual Private LAN Service

2024 Jan 3

Virtual Private LAN Service A VPLS is a Layer-2 VPN technology commonly used by Service Providers (SP) to offer Ethernet-based managed WAN connections over their existing MPLS network. A VPLS is a multipoint L2VPN service which uses an existing IP/MPLS backbone network to connect Provider Edge (PE) devices ...

MPLS Inter-AS option AB

2023 Sept 29

L3VPN inter-AS option AB Inter-AS option AB connects two Service Provider MPLS networks and allows VPN services to function across autonomous system boundaries. Inter-AS option AB combines features from options A and B. The interconnection between the SPs is not label switched and each customer receives ...

MPLS QoS Modes

2023 Sept 27

MPLS QoS Modes An MPLS label carries a 3-bit Experimental Use (EXP) field which marks the QoS value of a packet. When an IP packet enters a label switched network, the first three bits of the IP DSCP field are copied by the PE router into the EXP field of the MPLS label ...

Layer-2 VPN with L2TPv3

2023 Sept 25

L2TPv3 Layer-2 Tunneling Protocol version 3 (L2TPv3) provides a method of transporting Layer-2 Ethernet frames over an existing IP or MPLS network. This is achieved with a point-to-point pseudowire established between each end of the L2TPv3 tunnel ...

Ethernet over MPLS (EoMPLS)

2023 Sept 18

Ethernet over MPLS (L2VPN VPWS) Ethernet over MPLS (EoMPLS) creates a point-to-point pseudowire between two Provider Edge (PE) routers in order to transport Layer-2 frames across an existing IP/MPLS network. This enables service providers to use their existing IP/MPLS backbone network ...

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