Mixed-Version IP Router (MIR) - Not Recommended for New Designs Application Note: Virtex-II Pro Family R Mixed-Version IP Router (MIR) Author: Gordon Brebner XAPP655 (v1.2) October 13, 2004 Summary This application note describes a reference design for a mixed-version IP router (MIR) servicing up to four gigabit Ethernet ports. MIRs are useful where several gigabit Ethernet networks are operating with a mixture of IPv4 and IPv6 hosts and routers attached di……