manipulating the best path, eBGP, MED?

[Michael McConnell]

Hello Thomas,

I’m a tiny bit confused by your question, but here is my best attempt to answer it. In regards to multiple routers say you have .4 and .5 both with a HA address of .1 when using eBGP it will likely be the “old first” as you say that your host will pass the INBOUND data to. In regards to the outbound data, your host will accept the data from either .4 or .5 without issue, in fact it is a common configuration to have people the oldest BGP session be the inbound and then manipulate the HA and have .1 be on the newest. That way you have a bit of load distributed between the inbound and outbound host. 

Hope that helps,
Mike

--
Michael McConnell
WINK Streaming;
email: michael at winkstreaming.com <mailto:michael at winkstreaming.com>
phone: +1 312 281-5433 x 7400
cell: +506 8706-2389
skype: wink-michael
web: http://winkstreaming.com <http://winkstreaming.com/>
> On Mar 6, 2017, at 6:27 PM, Thomas at PhaseHosting <thomas at phasehosting.io> wrote:
> 
> Supp,
> 
> I implemented bird in our Private cloud running proxmox to distribute our public address with eBGP to our serverhost.
> 
> Through iBGP and a ucarp interface i have a HA gateway, the problem is that our host receives the routes but there are multiple entry points to our subnet ( the proxmox hosts). This makes that a diffrent in & out route doenst work. through following link: https://supportforums.cisco.com/document/126691/understanding-bgp-best-path-selection-manipulation I learned that my hosts selects its route based on age ( the bird with the first connection is chosen).
> 
> 
> Can i send a multi-exit discriminator with my eBGP connection to my host? I googled but could find 2 answers that did't change anything:
> 
> # your default gateway IP below here
> protocol bgp eBGP {
> import none;
> export  where proto = "static_packet";
> local as 65000;
> neighbor 10.80.x.x as 65530;
> password "SECRET";
> #med metric 10;
> #default bgp_med 10;
> }
> 
> (offcourse i tried both without # and waited till export)
> 
> 
> Or is there an other way to make sure that our host routes always to the first server and so on.
> 
> 
> 
> -- 
> Thomas Valgaeren
> thomas at phasehosting.io
> +32477915307

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