Juniper Route-failover in a typical DUAL ISP scenario
IN FIGURE 1 WE HAVE THE SAMPLE CONFIGURATION OF BFD-LIVENESS DETECTION APPLICATION WITH DUAL ISP SCENARIO. WE WANT TO TEST THE DUAL ISP FAILOVER. THIS MEANS THAT IF OUR MAIN PROVIDER ISP2 IS DOWN THE ROUTE SHOULD BE SWITCHED TO BACKUP ISP1. AS A TARGET WE HAVE DESTINATION ROUTER WITH LOOPBACK INTERFACE LO0 CONFIGURED. LET'S ASSUME THAT ROUTERS ARE NOT DIRECTLY CONNECTED BUT CONNECTED ON OPPOSITE ENDS OF AN ETHERNET SWITCH OR WAN TRANSPORT GEAR. A FAILURE ON ONE SIDE OF THE LINK LEAVES THE LINK UP ON THE OTHER SIDE. FIBER CUTS, CLUMSY ENGINEERS, FAILED EQUIPMENT ALL CAN CAUSE A STATIC ROUTE BLACKHOLE. SO LET'S SEE HOW CAN WE PROTECT AGAINST THIS TYPE OF FAILURE? Interface Configuration on Edge Router set interfaces em0 unit 0 family inet address 192.168.0.1/24 set interfaces em1 unit 0 family inet address 192.168.1.2/24 set interfaces em2 unit 0 family inet address 192.168.2.1/24 Interface Configuration on ISP1 Router set interfaces em0 unit 0 family in...