Helo all,
I have a scenarion. Im just beginner to BGP. We having customer with total 16 sites, 2 HQ and 14 branches. all this sites connected via MPLS which running under BGP. The MPLS cloud managed by our ISP.
2 HQ router which connected to Telco UPE (NTU) is running on BGP which establish BGP session to ISP PE router. all other 14 sites actually running on private broadband which connected to MPLS clound. Basically branch site just having a ADSL modem, once dialer get connected, they can communicate to all other site. Bothe HQ having separate Internet link to access internet. And all the branches accessing internt via HQ 1 internet link. To achive this, in HQ 1 router i jus add below command under router bgp AS ID
neighbor neighbour ID default-originate
And all the branches able to surf internet without no problem. But here we want once the HQ internet is down, we need all branch internet access is diverted to HQ 2 internet link. I know it can be done manually in HQ 2 router by adding the same command. But is there anyway to do it automatically? What if both site HQ 1 and 2 advertised default route? which link will the branch choose? can I advertise default route with metric?
my request in simple form.
If HQ 1 internet link down: branches and HQ 1 should use HQ 2 internet to online
if HQ 2 internet link down : branches and HQ 2 should use HQ 1 internet to online
Anyway to achive this?
Regards,
Nagis
