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Egress Peer Engineering: building blocks

October 7, 2024 Dmytro Shypovalov Leave a comment

Since exploring the EPE basics, now it’s time to understand the building blocks of the solution.…

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Filed under: BGP, EPE, MPLS, Segment Routing, SR-TE

Egress Peer Engineering: basics

September 23, 2024 Dmytro Shypovalov Leave a comment

Egress Peer Engineering extends regular BGP policies to provide more flexibility.…

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Filed under: BGP, EPE, MPLS, Segment Routing, SR-TE

Poor man’s Traffic Engineering

September 2, 2024 Dmytro Shypovalov Leave a comment

Segment Routing allows the network operator to deploy Traffic Engineering even with the most basic routers that support the bare minimum of features.…

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Filed under: network design, Segment Routing, SR-TE

Making Segment Routing user-friendly

July 1, 2024 routingcraft 4 Comments

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.…

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Filed under: MPLS, network design, Segment Routing, SR-TE

Explicit Null in Segment Routing

January 13, 2022 routingcraft Leave a comment

MPLS is such a user-friendly technology it needs a special label that does nothing.

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Filed under: MPLS, Segment Routing, SR-TE

LDP and anycast routing

December 15, 2021 routingcraft Leave a comment

My recent post about Anycast in Segment Routing led to an interesting argument on whether other MPLS transport protocols can do anycast routing.…

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Filed under: anycast routing, fast convergence, LDP, MPLS

Anycast in Segment Routing

November 9, 2021 routingcraft 6 Comments

MPLS or Anycast Routing – for a long time, you had to choose one. Segment Routing allows you to have both.…

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Filed under: anycast routing, ECMP, fast convergence, IS-IS, MPLS, Segment Routing, SR-TE, TI-LFA

ARP problems in EVPN

October 6, 2021 routingcraft 15 Comments

In any L2 overlay network, ARP handling will always remain a big pain for network operators.…

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Filed under: ARP, EVPN

How to troubleshoot routing protocols session flaps – part 1

October 29, 2020 routingcraft 7 Comments

Instability of routing protocol sessions – or, in the network engineers’ slang, flaps, is by far the most common and the most basic routing problem that ever occurs.

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Filed under: BGP, troubleshooting

Equal Routes

June 17, 2020 routingcraft 1 Comment

In highload cloud networks there is so much traffic that even 100G/400G port speeds do not suffice, so sharing the load over multiple links is the only feasible solution.

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Filed under: BGP, ECMP, load balancing, MPLS, Segment Routing, SR-TE

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