# Repost: EBGP-Mostly Service Provider Network

DevFeed: [Repost: EBGP-Mostly Service Provider Network](<https://devfeed.tech/articles/repost-ebgp-mostly-service-provider-network-10987.md>)

Original publisher: [Read original article](<https://blog.ipspace.net/2024/04/repost-ebgp-only-sp-network/>)

Published: 2024-04-01T06:08:00Z

Content type: opinion

Language: en

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

Topics: [BGP](<https://devfeed.tech/topics/bgp.md>), [networking](<https://devfeed.tech/topics/networking.md>), [Network](<https://devfeed.tech/topics/network.md>), [evpn](<https://devfeed.tech/topics/evpn.md>), [VXLAN](<https://devfeed.tech/topics/vxlan.md>), [Kubernetes](<https://devfeed.tech/topics/kubernetes.md>)

Tags: [bgp](<https://devfeed.tech/tags/bgp.md>), [bugs](<https://devfeed.tech/tags/bugs.md>), [design](<https://devfeed.tech/tags/design.md>), [evpn](<https://devfeed.tech/tags/evpn.md>), [mpls](<https://devfeed.tech/tags/mpls.md>), [network](<https://devfeed.tech/tags/network.md>), [networking](<https://devfeed.tech/tags/networking.md>), [vxlan](<https://devfeed.tech/tags/vxlan.md>)

## AI overview

This repost discusses a Service Provider network design based primarily on eBGP across numerous private autonomous systems. It argues that eBGP can provide granular traffic engineering, multipathing, and unconventional topologies, while MPLS and VXLAN/EVPN may still be used as BGP-driven transport mechanisms. The author notes that documentation for such designs is limited and warns that unconventional deployments may expose previously unseen bugs.

## Source excerpt

Daryll Swer left a long comment describing how he designed a Service Provider network running in numerous private autonomous systems. While I might not agree with everything he wrote, it's an interesting idea and conceptually pretty similar to what we did 25 years ago (IBGP without IGP, running across physical interfaces, with every router being a route-reflector client of every other router), or how some very large networks were using BGP confederations. Just remember (as someone from Cisco TAC told me in those days) that "you might be the only one in the world doing it and might hit bugs no one has seen before." Read more ...