4 ms·
"Second, BGP routes are not that stable." This has been disproved for close to ten years empirically and academically[1]. Route flaps generally result in conve
by davidu 9y ago
"Second, BGP routes are not that stable."
This has been disproved for close to ten years empirically and academically[1]. Route flaps generally result in convergence to the exact same destination if it has another path and is still online. If it's offline, then it's working as intended, and that's no different from a server being rotated via a DNS pool going down.
1: Quick search: https://www.google.com/search?q=tcp+anycast+paper&ie=utf-8&oe=utf-8&client=firefox-b-1-ab https://www.google.com/search?q=tcp+anycast+paper&ie=utf-8&o...
- jgrahamc 9y agoThat's not our experience either. BGP is fine. But it is the case that transit and peering connections are not stable (in the sense of going up and down randomly or suddenly experiencing high levels of packet loss) and active monitoring is a must.
- janoszen 9y agoThank you to both of you, I've edited the article to clarify that point.
- davidu 9y agoIs your experience that when routes reconverge, they still select the same end POP they did prior to the flap? Assuming the end POP is still reachable along another regional route, I believe all the data I've seen shows that the client almost always hits the same destination they did before the flap.