In the network shown in the figure, OSPF protocol is run between R1, R2, and R3. IBGP neighbor relationship is established between R1 and R3 using loopback interface. If OSPF is shut down on R2's…

In the network shown in the figure, OSPF protocol is run between R1, R2, and R3. IBGP neighbor relationship is established between R1 and R3 using loopback interface. If OSPF is shut down on R2's GE0/0/1 interface through "undo network xxxx yyyy" command, and BGP neighbor relationship is checked on R1, by default, the longest time for R1 BGP neighbor relationship to change from Up state to Dom state is which of the following?