Two Wan router with BGP and failover

[ismayilov.vakar]

Hi everyone,

We have became LIR (RIPE provide us with global subnet and BGP ASN), we have two router with two different ISP line and each ISP advertise our asn and prefix list so we use third router for internet and advretise our web services (NAT). We need failover for third router but want to define isp A primary and isp B for backup when isp A goes up to preempt isp A line. (for inbound and outbound route use same ISP )

[Mark Malone]

Hi
This document may help there is sections in it that describe different scenarios with dual homed ISP BGP setups and how to make 1 or the other preferred using BGP metrics

section
Load Sharing When Multihomed to Two ISPs Through Multiple Local Routers
https://www.cisco.com/c/en/us/support/docs/ip/border-gateway-protocol-bgp/13762-40.html#anc26

[Jaderson Pessoa]

@ismayilov.vakar  in Addition @Mark Malone , I suggest you to use PBR to control this traffic.

check this link for more information: https://community.cisco.com/t5/routing/using-pbr-for-bgp-redundancy/td-p/1826938