Before Segment Routing was introduced, IP FRR and Loop-Free Alternates (LFAs) were not widely deployed. In these implementations the level of coverage depended on the network topology. When SR combined with FRR techniques, Fast Reroute can deliver 100% network coverage regardless of the topology. That is called TI-LFA (Topology Independent – Loop Free Alternate) Here …
Before Segment Routing was introduced, IP FRR and Loop-Free Alternates (LFAs) were not widely deployed. In these implementations the level of coverage depended on the network topology. When SR combined with FRR techniques, Fast Reroute can deliver 100% network coverage regardless of the topology. That is called TI-LFA (Topology Independent – Loop Free Alternate) Here …
VXLAN allows us to create layer 2 networks over layer 3 infrastructure. The VXLAN base use case is to connect two or more layer three network domains and make them look like a common layer two domain. In the Data center environment this allows virtual machines on different networks to communicate as if they were …
VXLAN allows us to create a logical topologies in the Data Center for our virtual machines. With VxLAN we are able to create a layer 2 network on top of layer 3 infrastructure. In the Data Centers VMs needs to be deployed in a specific segment of the network. These VMs can be moved from …
EVPN is a standards-based BGP control plane to advertise MAC addresses, MAC and IP bindings and IP Prefixes. It can be used for both layer 2 services including p2p services and p2mp services and layer 3 services. First standards for EVPN defined to usage over MPLS (including SR-MPLS) data plane but it is also possible …
In Segment Routing Architecture IGP Prefix Segment Identifer (Prefix-SID) is a Global Segment, advertised by ISIS or OSPF and associated with a prefix, commonly with a loopback ip address. It is also called Node SID. Segment Routing Adj-SIDs usually represent a link (peering) and have a local significance. In SRv6 SID we have Locator and Function. Locator: Routed to the node …
In today’s network, path control can be achieved with MPLS Traffic Engineering tunnels. These tunnels can be created with protocols like RSVP-TE and CR-LDP. Even for the SR-MPLS and SRv6. When defining paths, both static and dynamic options are available. MPLS TE is deployed today by many operators to optimize network bandwidth usage, to provide …
Segment Routing architecture can be applied to MPLS data plane and IPv6 data plane (SRv6). IN MPLS Data plane IGP Prefix SID and IGP Adj SIDs (Adj-SID) are used for traffic engineering. (Segment Routing IGP Segments). An SR Policy may use both Prefix SID and Adj-SIDs which are encoded as mpls label or label stack. …