Tuesday, December 1, 2015

dual stack ipv4/ipv6

Ipv4 and ipv6 can co-exist over the same network with little issues. Take a design similar to the following;


This would be very common & supported ipv4 and ipv6 LANs for a  interior instance. Almost all deices nowadays support dualstack objects regardless if it's a host, firewall, server, or router element.

Items you should take into consideration for dual-stack

   1: protocol priority  ipv4 or ipv6 for dns

   2: proper prefixes allocations

   3: network aggregation concerns

   4: host assignment and network management for static allocations

   5: stateful or stateless addressing concerns

   6: protocol fall back

   7: proper AAAA resource-records

   8: proper services monitoring especially for the ipv6 services

   9:  do you need NAT64 or NAT46  for legacy un-supported devices or even tunnels for ipv6 islands and reaching distance LAN segments

Ken Felix
NSE ( network security expert) and Route/Switching Engineer
kfelix  -----a----t---- socpuppets ---dot---com

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