A big problem with deploying traffic engineering is configuration complexity. This has now been solved. Why use Traffic Engineering Typical reasons for using traffic engineering are: Send some traffic via a low latency path Send A/B streams via different paths …
Segment Routing simplifies MPLS for the network operator – but not for the developer. How Traffic Engineering works Consider the topology: I want to steer traffic from R1 to R7 using only blue links. R1 (or controller) runs Constrained Shortest …
Methods of steering traffic into MPLS and Segment Routing LSP is one of the least standardized and most confusing parts of traffic engineering. The mess of nexthop resolution Despite some existing interoperability issues, in general, the MPLS and SR control …
Despite many advantages of Segment Routing, some networks still prefer to use RSVP for traffic engineering – and they can have good reasons for this. Is there any value of SDN controller with RSVP-TE, compared to configuring policies on each …
A quick public service announcement for anyone implementing BGP-LU or deploying it in a multivendor environment. What is BGP Labeled Unicast Originally, BGP was designed to advertise IP prefixes. Then [ RFC2283 ] (obsoleted by [ RFC4760 ]) defined Multiprotocol …
Since exploring the EPE basics, now it’s time to understand the building blocks of the solution. Summary Overall, there are 3 elements of the EPE solution: Egress routers allocate MPLS labels per egress peer and advertise them Ingress routers or …
Egress Peer Engineering extends regular BGP policies to provide more flexibility. Why use Egress Peer Engineering When a network operator has multiple external connections, such as IP transit, private peerings or Internet Exchange (IXP), there is often a need to …
Segment Routing allows the network operator to deploy Traffic Engineering even with the most basic routers that support the bare minimum of features. What is traffic engineering Traffic engineering is a set of techniques to influence the path a particular …
Segment Routing was supposed to make MPLS easier and give more power to network operators. Sadly, vendors decided to make it harder by selling weird protocols and over-engineered controller bloatware. MPLS is actually great Despite some anti-MPLS marketing from SD-WAN …
MPLS is such a user-friendly technology it needs a special label that does nothing. Why explicit null Normally, the penultimate router in the LSP removes (pops) the top transport label, so that the egress LSR will deal either with the …