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diff --git a/_posts/2024-03-17-further-learnings-from-running-my-as.md b/_posts/2024-03-17-further-learnings-from-running-my-as.md index b1a3839..416d4e2 100644 --- a/_posts/2024-03-17-further-learnings-from-running-my-as.md +++ b/_posts/2024-03-17-further-learnings-from-running-my-as.md @@ -2,6 +2,7 @@ layout: post title: Further learnings from running my AS date: 2024-03-17 14:42 +0100 +last_modified_at: 2024-04-29 18:55 +02:00 lang: en categories: ["tech"] --- @@ -91,3 +92,17 @@ Futher info: - [DN42 wiki](https://dn42.eu/howto/Bird2#route-origin-authorization), scroll down for RPKI example configuration. - [APNIC: Deploying RPKI at Comcast](https://blog.apnic.net/2022/04/08/deploying-rpki-at-comcast/) + +**Update 2024-04-29** + +- I can actually "safely" discard everything with an AS path length >15. + I took a look at the routes, and there are (only/mostly?) routes with + *lots of* path prepending in that size range. Maybe I could go + *even lower*, but I got tired of making the birdc filter + (`show route where bgp_path !~ [...]`) longer and longer, and then scrolling + through the route output. +- Another "oops!". I thought giving my hosting provider a higher BGP local preference + was a good idea, as all the other transit providers are connected via GRE tunnel. + Only I wondered why *on my other VPS* suddenly a huge amount of routes preferred + to go via IBGP. I facepalmed when I realized what I did. (BGP local pref attribute + is sent via IBGP sessions). |