[HN Gopher] MPLS/LDP Creation Myths
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       MPLS/LDP Creation Myths
        
       Author : liotier
       Score  : 18 points
       Date   : 2022-04-15 13:44 UTC (9 hours ago)
        
 (HTM) web link (blog.ipspace.net)
 (TXT) w3m dump (blog.ipspace.net)
        
       | teleforce wrote:
       | If IPv6 and Segment Routing IPv6 (SRv6) are gaining momentum and
       | become popular then there will be no need for MPLS/LDP. Now with
       | SRv6, you can control your end-to-end connection QoS from the
       | edge without touching the core. This is what networking people
       | call IP 2.0 where IP is consolidating its main role as the real
       | nexus of the Internet whereas IP 1.0 is just patching the IPv4
       | with a duct tape MPLS[1].
       | 
       | [1]SRv6 Network Programming: Ushering in a New Era of IP Networks
       | 
       | https://www.routledge.com/SRv6-Network-Programming-Ushering-...
        
         | dvno42 wrote:
         | I'm understanding this all as a way to simplify designs and
         | make it easier to bring in central controllers and automation
         | to manage end to end 'virtual circuits'.
         | 
         | I've never heard of segment routing (SRv6) and I'm happy to see
         | it's not a proprietary feature by some vendor[1]. If I'm
         | understanding correctly, segment routing allows a designer to
         | cut out the traditional labeling and traffic engineering
         | protocols like RSVP-TE and LDP/TDP but still retain the ability
         | to do multipathing (ECMP) and traffic engineering.
         | 
         | What I'm not sure of is if this replaces VPLS/EVPN (overlay VPN
         | mechanism) or if those features still ride on top of SRv6. It
         | looks like the IGP (routing protocol like OSPF) needs extension
         | support for SRv6 to work.
         | 
         | I just found a Cisco presentation that touches on a lot of
         | this[2].
         | 
         | For those wondering, these features are available today on the
         | major platforms
         | 
         | [1]https://datatracker.ietf.org/doc/html/rfc8986 [2]https://www
         | .ciscolive.com/c/dam/r/ciscolive/apjc/docs/2018/p...
        
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