manipulating the best path, eBGP, MED?

[Thomas@PhaseHosting]

Supp,

thnqx for the reply,

The BGP i have figured out and i have confirmation from my host they 
accept customer-set MEDs. Only i couldn't get these working and i found 
2 posts on the internet with a different configuration and i don't know 
which one is  the right one, "med metric 10;" or "default bgp_med 10;"

Am i right that MED is the only option to influence the  eBGP and 
manipulate the prefered path? ( Values like AS are the same and others 
are not accepted)


I attached my eBGP in previous mail.


Regards Thomas



Op 3/7/2017 om 2:26 PM schreef 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 <mailto: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 <mailto:thomas at phasehosting.io>
>> +32477915307
>

-- 
Thomas Valgaeren
thomas at phasehosting.io
+32477915307

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