Why use socond router??? Isp give you one ip block routed to your ip. It is simple routing. Assing your wan ip to interface connected to isp and first ip from lan block to lan master interface or bridge if you have one. No need for nat if there are public ips. If they arent you have to nat. If you wonder why to use a ccr for 500 Mbps i don`t think you will get another cheap alternative to perform well at this speed.
Thanks, I got it.
So every ISP who given me routed ip block I always need a CCR or L3 router to use routed IP's.
if we have two ISP or more all are providing their separated routed IP's, to use theme each bandwidth should have separate CCR. Is this right what I am thinking? Further, then for load-balancing I need another CCR.
CCR1=use for ISP1 termination
CCR2=use for ISP2 termination
CCR3=use for loadbalancing.
or all task can be done on single CCR. Now, i am confused here.