# MPLS-TE

Published articles for MPLS-TE.

This is one page of public article previews, not the complete archive. Follow Next page to continue. Summaries are not the original full articles.

## Multi-Layer Switching and Tunneling

DevFeed: [Multi-Layer Switching and Tunneling](<https://devfeed.tech/articles/multi-layer-switching-and-tunneling-11183.md>)

Original publisher: [Read original article](<https://blog.ipspace.net/2025/05/multi-layer-switching-tunneling/>)

Published: 2025-05-30T06:20:00Z

Content type: article

Language: en

Sources: [ipSpace.net blog](<https://devfeed.tech/sources/ipspace-net-blog.md>)

Topics: [networking](<https://devfeed.tech/topics/networking.md>), [Routing (disambiguation)](<https://devfeed.tech/topics/routing.md>), [MPLS-TE](<https://devfeed.tech/topics/mpls-te.md>), [BGP](<https://devfeed.tech/topics/bgp.md>), [Ethernet](<https://devfeed.tech/topics/ethernet.md>), [Protocol (disambiguation)](<https://devfeed.tech/topics/protocol.md>)

Tags: [bgp](<https://devfeed.tech/tags/bgp.md>), [ethernet](<https://devfeed.tech/tags/ethernet.md>), [mpls](<https://devfeed.tech/tags/mpls.md>), [mpls-te](<https://devfeed.tech/tags/mpls-te.md>), [networking](<https://devfeed.tech/tags/networking.md>), [networking-fundamentals](<https://devfeed.tech/tags/networking-fundamentals.md>), [protocol](<https://devfeed.tech/tags/protocol.md>), [router](<https://devfeed.tech/tags/router.md>), [routing](<https://devfeed.tech/tags/routing.md>), [switching](<https://devfeed.tech/tags/switching.md>)

### AI overview

The article explains multi-layer switching, where edge devices forward traffic at a higher networking layer while core devices forward it at a lower layer. It describes IP forwarding over bridged Ethernet and virtual-circuit-like approaches using MPLS, MPLS-TE, BGP, and segment routing.

### Source excerpt

When deep-diving into the confusing terminology of switching, routing, and bridging, I mentioned you could perform packet forwarding at different layers of a networking stack. In this blog post, we'll explore what happens when we combine packet forwarding on multiple layers within a single network, resulting in multi-layer switching, where edge devices perform Layer n forwarding (usually Layer 3), and core devices perform Layer n-1 forwarding (typically Layer 2). Each layer can use any forwarding paradigm you choose. However, since we generally use IP at Layer 3, edge devices typically perform hop-by-hop destination-based forwarding, while core devices can use alternative methods. Read more ...

## Traffic steering into label-switched paths (LSPs)

DevFeed: [Traffic steering into label-switched paths (LSPs)](<https://devfeed.tech/articles/worth-reading-traffic-steering-into-lsps-11153.md>)

Original publisher: [Read original article](<https://blog.ipspace.net/2025/03/lsp-traffic-steering/>)

Published: 2025-03-10T07:12:00Z

Content type: article

Language: en

Sources: [ipSpace.net blog](<https://devfeed.tech/sources/ipspace-net-blog.md>)

Topics: [SR-MPLS](<https://devfeed.tech/topics/sr-mpls.md>), [MPLS-TE](<https://devfeed.tech/topics/mpls-te.md>), [Software-defined networking](<https://devfeed.tech/topics/sdn.md>), [Network](<https://devfeed.tech/topics/network.md>), [NETCONF](<https://devfeed.tech/topics/netconf.md>)

Tags: [mpls](<https://devfeed.tech/tags/mpls.md>), [mpls-te](<https://devfeed.tech/tags/mpls-te.md>), [netconf](<https://devfeed.tech/tags/netconf.md>), [network](<https://devfeed.tech/tags/network.md>), [sdn](<https://devfeed.tech/tags/sdn.md>), [traffic-engineering](<https://devfeed.tech/tags/traffic-engineering.md>), [worth-reading](<https://devfeed.tech/tags/worth-reading.md>)

### AI overview

The article discusses steering network traffic into label-switched paths (LSPs) built with SR-MPLS, MPLS-TE, or an SDN controller. It explains that installing LSPs is only part of the task; network devices must also be configured to use them.

### Source excerpt

You can use SR-MPLS, MPLS-TE, or an SDN controller to build virtual circuits (label-switched paths) across the network core. The controller can push the LSPs into network devices with PCEP, BGP-LU, or some sort of NETCONF/RESTCONF trickery. Unfortunately, you're only half done once you have installed the LSPs. You still have to persuade the network devices to use them. Welcome to the confusing world of traffic steering explored in the Loopback as a Service blog post by Dmytro Shypovalov. Read more ...

## Using an SDN Controller for RSVP-TE

DevFeed: [Using an SDN Controller for RSVP-TE](<https://devfeed.tech/articles/worth-reading-using-sdn-controller-with-rsvp-te-11140.md>)

Original publisher: [Read original article](<https://blog.ipspace.net/2025/02/using-sdn-controller-rsvp-te/>)

Published: 2025-02-20T07:14:00Z

Content type: opinion

Language: en

Sources: [ipSpace.net blog](<https://devfeed.tech/sources/ipspace-net-blog.md>)

Topics: [Software-defined networking](<https://devfeed.tech/topics/sdn.md>), [SR-MPLS](<https://devfeed.tech/topics/sr-mpls.md>)

Tags: [article](<https://devfeed.tech/tags/article.md>), [mpls](<https://devfeed.tech/tags/mpls.md>), [mpls-te](<https://devfeed.tech/tags/mpls-te.md>), [sdn](<https://devfeed.tech/tags/sdn.md>), [sr-mpls](<https://devfeed.tech/tags/sr-mpls.md>), [worth-reading](<https://devfeed.tech/tags/worth-reading.md>)

### AI overview

A recommendation for an article about using an SDN controller with RSVP-TE. It discusses why RSVP-TE may still be preferred over SR-MPLS, the role of an SDN controller, and RSVP/SR coexistence and interworking.

### Source excerpt

Dmytro Shypovalov published another article well worth reading: why should you use an SDN controller for RSVP-TE. It covers: The reasons people might still prefer RSVP-TE over SR-MPLS and the current state of RSVP-TE What an SDN controller might bring to the RSVP-TE world SR/RSVP coexistence and interworking Have fun!

## Running Routing Protocols over Tunnels

DevFeed: [Running Routing Protocols over Tunnels](<https://devfeed.tech/articles/running-routing-protocols-over-tunnels-11100.md>)

Original publisher: [Read original article](<https://blog.ipspace.net/2024/11/running-routing-protocols-over-tunnels/>)

Published: 2024-11-05T07:14:00Z

Content type: article

Language: en

Sources: [ipSpace.net blog](<https://devfeed.tech/sources/ipspace-net-blog.md>)

Topics: [networking](<https://devfeed.tech/topics/networking.md>), [Routing (disambiguation)](<https://devfeed.tech/topics/routing.md>), [Protocol (disambiguation)](<https://devfeed.tech/topics/protocol.md>), [BGP](<https://devfeed.tech/topics/bgp.md>), [IS-IS](<https://devfeed.tech/topics/is-is.md>), [MPLS-TE](<https://devfeed.tech/topics/mpls-te.md>), [MPLS VPN](<https://devfeed.tech/topics/mpls-vpn.md>), [evpn](<https://devfeed.tech/topics/evpn.md>), [VXLAN](<https://devfeed.tech/topics/vxlan.md>), [Reason](<https://devfeed.tech/topics/reason.md>)

Tags: [bgp](<https://devfeed.tech/tags/bgp.md>), [evpn](<https://devfeed.tech/tags/evpn.md>), [ip-routing](<https://devfeed.tech/tags/ip-routing.md>), [is-is](<https://devfeed.tech/tags/is-is.md>), [mpls](<https://devfeed.tech/tags/mpls.md>), [mpls-te](<https://devfeed.tech/tags/mpls-te.md>), [ospf](<https://devfeed.tech/tags/ospf.md>), [protocol](<https://devfeed.tech/tags/protocol.md>), [recursion](<https://devfeed.tech/tags/recursion.md>), [routing](<https://devfeed.tech/tags/routing.md>), [vxlan](<https://devfeed.tech/tags/vxlan.md>)

### AI overview

This article explains why routing protocols over tunnels can cause recursive routing and infinite encapsulation. It distinguishes traffic-engineering and IPsec tunnels from VPN designs, where routing protocols exchange customer and transport prefixes using separated address spaces or families.

### Source excerpt

James got confused by a statement made by Hannes Gredler in his IS-IS book: Things behave really badly if the total IGP cost over the tunnel undermines the total topologies' cost. What happens next is that the tunnel "wraps" around itself, ultimately causing a meltdown of the entire network. Let's unpack that, starting with "Why would you need a tunnel?" Read more ...