What is the command to configure VRRP preemption delay?

When deploying BGP/MPLS IP VPN, when two VPNs have a common site, the common site must not use overlapping address spaces with other sites of the two VPNs.

What is wrong about the description of the permanent multicast address?

As shown in the figure, the A department of branch 1 can access the Internet, but the B department can only use the encrypted VPN to access the headquarters resources. You can configure the NAT policy on the export device so that department A can access the Internet and configure IPsec VPN (ESP protocol) for department B + tunnel mode method to allow it to access the headquarters.

Intranet users of a certain company use NAT's No-pat method to access the Internet. If all public IP addresses are used, what will happen to intranet users who subsequently go online?