Why did Branch1 router lose WAN connectivity with R1 router?
A. The PPP multilink group is misconfigured on the R1 serial interfaces.
B. The Branch1 serial interfaces are placed in a shutdown condition.
C. The IP address is misconfigured on PPP multilink interface on the Branch1 router.
D. interfaces.
Answer:C
Why did Branch1 router lose WAN connectivity with R1 router?
A. The PPP multilink group is misconfigured on the R1 serial interfaces. B. The Branch1 serial interfaces are placed in a shutdown condition. C. The IP address is misconfigured on PPP multilink interface on the Branch1 router. D. interfaces.
Explanation: First we should check both routers with the "show ip interface brief" command. On R1: