What is Reddit's opinion of MPLS in the SDN Era: Interoperable Scenarios to Make Networks Scale to New Services?

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im going to give you some general advice here when it comes to this as i have done it in the past and am actually doing it now. not going to design your entire backbone. i would highly suggest if you are going to look at segement routing you take a look at these 3 books:

• MPLS in the SDN Era
• Segment Routing Part 1
• Segment Routing Part 2

> Do you have any examples for it in real world? In our case problem arises, when labels from BGP LU (Inter-AS Option C scheme) for nexthop need to be populated into the segment routing domain in another AS.

yep this is a problem, you have a few options:

• SRMS - doesnt scale super well in production when you have thousands upon thousands of loopbacks between networks
• manual mapping of a SID per BGP network statement, again doesnt scale very well
• run LU in the core with a 3 label stack, this is what im doing, it is painless and you still get TI-LFA to the lookback of the BGP-LU speaker in our SR enabled BKBN. your label stack looks like this:

SR LABEL|LU LABEL|V LABEL|CW LABEL (if you use CW)

LU is not interas option C, LU is RFC3107. You are likely looking at what is commonly called "Seamless MPLS" or "unified MPLS". a google search on either of those should help you out.

both BGP-SR and SR-TE are available with LU in the SR core.

the simplest way is kompella style (BGP for services) services vs martini (tLDP) but thats a different conversation.

We have CCIE SP bootcamp self-paced workbook here: https://leanpub.com/cciespv41. Apart from Cisco Press MPLS VPN architectures Vol I & II, BGP and IP Routing troubleshooting one I'd also recommend going through "MPLS in SDN era": https://www.amazon.com/MPLS-SDN-Era-Interoperable-Scenarios/dp/149190545X

some quality books:

MPLS in the SDN Era

CCIE Service Provider Version 4 Written and Lab Exam Comprehensive Guide

Other classics from the Cisco Press world:

MPLS and VPN Architectures

MPLS and VPN Architectures, Volume II

MPLS Fundamentals

Definitive MPLS Network Designs

Advanced MPLS Design and Implementation

The above books are solid, many were used more from a reference to help clarify a topic vs reading from cover to cover. i would buy the above books used on amazon to save some money unless you have a safari subscription.

INE is OK but my struggles were with the lack of love the SP track got when i was studying for my SP in 2017, things may have changed but buyer beware. their racks are still decent, again with SP i found myself fixing many things in their preloaded templates and if you find issues you can send them to Brian and he will try to update/fix them as they are reported.

VIRL is also a requirement, now if you decide to use VIRL or just the images in gns3 is up to you. Lastely i built a CCIE SP random lab generator for the SP track, feel free to use it to help you study as well.

some quality books for MPLS (many may beyond needs of the R&S) are:

MPLS in the SDN Era

CCIE Service Provider Version 4 Written and Lab Exam Comprehensive Guide

Now these two may be more than you need BUT i found them to be the best, HANDS DOWN, compared to any other cisco press book, INE workbook/video when it came to MPLS in its many flavors(LDP/RSVP-TE/static/TP/SR/LU) as well as the services you may want to run overtop of your MPLS network (L2VPN/L3VPN/etc).

Other classics from the Cisco Press world are:

MPLS and VPN Architectures

MPLS and VPN Architectures, Volume II

MPLS Fundamentals

Definitive MPLS Network Designs

Advanced MPLS Design and Implementation

The above books are solid, i used many of them with both my R&S/SP IE's. While many were used more from a reference to help clarify a topic vs reading from cover to cover. i would buy the above books used on amazon to save some money unless you have a safari subscription.

also keep in mind that while many of these cisco press books may be going on a decade old the actual design/configuration of MPLS has not changed a ton (outside of SR) and odd use cases in networks. honestly the biggest thing you may struggle with is in modern MPLS books they often reference IOS-XR vs IOS/IOS-XE as many SP's that run Cisco are running boxes that run IOS-XR in this era of MPLS.