In the network shown in the figure, OSPF protocol runs between R1, R2, and R3. IBGP neighbor relationship is established between R1 and R3 using loopback interface, and BFD function is enabled in…

In the network shown in the figure, OSPF protocol runs between R1, R2, and R3. IBGP neighbor relationship is established between R1 and R3 using loopback interface, and BFD function is enabled in BGP process. BFD parameters are "bfd min-tx-interval 1000 min-rx-interval 1000 detect-maltiplier6". If OSPF is disabled on GE0/0/1 interface of R2 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 down state is which of the following?