In the network shown in the figure, R1 and R2 establish an EBGP neighbor relationship through a directly connected interface, and the BFD function is enabled in the BGP process. The BFD parameters…

In the network shown in the figure, R1 and R2 establish an EBGP neighbor relationship through a directly connected interface, and the BFD function is enabled in the BGP process. The BFD parameters are "bfd min-tx-interva1 1000min-rx-interva1 1000 detect-multiplier6". If the IP address of R2's GE0/0/0 interface is deleted, and the BGP neighbor relationship is checked on R1, which of the following is the longest time for the R1 BGP neighbor relationship to change from Up to Down?