BGP advertise-map in XOS

[Elie_Raad]

I have a Multi-homed Routers connected to 2 ISPs. I need to Create like an Advertise-map on the Standby Router connected to the Standby ISP to only advertise my Public address if the primary link goes down .

Is there a way of doing it in XOS ?
Thank You,
Elie

[Jarek]

Elie,

do you have your own AS and IP net block ?
Or you have some IP's from Cogent and some from Expedient ?

--
Jarek

[Jarek]

Hi Nick,

local preference is an attribute that routers exchange in the same AS.
eBGP peer is not aware about it.

--
Jarek

[Nick_Yakimenko]

Well, both uplinks are in ARIN area -- they do not have a strict policy to have an up-to-date information about peering as in RIPE area:
Compare info about your secondary ISP https://whois.arin.net/rest/asn/AS17054 and our one: https://apps.db.ripe.net/search/lookup.html?source=ripe&key=AS20850&type=aut-num

Therefore, you should manually write an e-mail to Expedient support or NOC team to find out if they support communities or localprefs or if they cat accept your announces with a minimal local preference

[Elie_Raad]

Cognet AS 174 (Primary) Expedient AS 17054 Secondary

[Nick_Yakimenko]

which AS numbers of you uplink ISP-s?
I will help you to find out if your uplinks accept communities