The second specification of the local peer's IP address for the
associated IPsec Phase-1 IKE Tunnel (IKETunLocalValue2 in the
IKETunnelTable).
If the local peer type is ipv4AddrSubnet/ipv6AddrSubnet, this
is the subnet mask.
If the local peer type is ipv4AddrRange/ipv6AddrRange, this is
the ending IP address of the range.
If the local peer type is others, this is a zero-length string.