.......ok now my brain hurts :) Sent from my Verizon Wireless BlackBerry -----Original Message----- From: Joe Astorino <[email protected]> Date: Mon, 8 Feb 2010 23:42:08 To: Gian Paolo<[email protected]> Cc: CCIE_RS OnlineStudyList<[email protected]> Subject: Re: [OSL | CCIE_RS] Vod v4 - IPv6 static NAT
Sorry, minor edit to step 7 and step 8 7) The NAT-PT router creates an IPv6 packet sourced from 3000:b00:ffff:ffff::a and destined for 3000:b00:ffff:1::1 8) HostA receives an IPv6 packet sourced from 3000:b00:ffff:ffff::a and destined to 3000:b00:ffff:1::1 On Mon, Feb 8, 2010 at 11:28 PM, Joe Astorino <[email protected]> wrote: > The syntax in the video is actually correct. This is a specific > technology known as NAT-PT, which is used for a very specific purpose > -- Getting IPv4 ONLY hosts to communicate with IPv6 ONLY hosts using > NAT mappings. > > In the example in the video we have 2 hosts -- 1 host is IPv4 only and > the other host is IPv6 only. This shows how to make the two > communicate. > > IPv4 Host D -- 172.18.30.1 > IPv6 Host A -- 3000:B00:FFFF:1::1 > > In this case, the command "ipv6 nat prefix 3ffe:b00:ffff:ffff::/96" is > used to determine the range for the NAT-PT. In other words, it says > "If I see something destined for something in this /96 range, do the > NAT-PT translation". So, if Host A (IPv6 Host) sends a packet to > anything in that /96 range and the packet is sourced from > 3000:b00:ffff:1::1 then what will happen is the NAT-PT router in the > middle will make the IPv4 source address 192.168.199.2 and send it > along the way to HostD > > Let's look at it end-to-end. > > 1) Host A sends a ping to 3ffe:b00:ffff:ffff::a <--- in the /96 range > 2) The NAT-PT gets this packet and realizes it is sourced from > 3000:b00:ffff:1::1 and that it is destined for 3ffe:b00:ffff:ffff::a > 3) The NAT-PT router creates an IPv4 packet sourced from 192.168.199.2 > destined for 172.18.30.1. It knows the destination IPv4 address due > to the static NAT configuration > 4) Host D receives an IPv4 packet sourced from 192.168.199.2 and > destined for 172.18.30.1 > 5) Host D responds with an ICMP Echo-Reply sourced from 172.18.30.1 > and destined for 192.168.199.2 > 6) The NAT-PT router gets this packet, and realizes it is sourced from > 172.18.30.1 and that it is destined for 192.168.199.2 > 7) The NAT-PT router creates an IPv6 packet sourced from > 3000:b00:ffff:ffff::a and destined for 3ffe:b00:ffff:1::1 > 8) HostA receives an IPv6 packet sourced from 3000:b00:ffff:ffff::a > and destined to 3ffe:b00:ffff:1::1 > > Check out this > document:http://www.cisco.com/en/US/docs/ios/ipv6/configuration/guide/ip6-nat_trnsln_ps6350_TSD_Products_Configuration_Guide_Chapter.html > > On Sat, Feb 6, 2010 at 7:27 AM, Gian Paolo <[email protected]> wrote: >> Hi all, >> I'm watching VoD v4 video on IPv6. On 53:39 - static nat, the IPv6 range >> dedicated to IPv6 translations is >> >> ipv6 nat prefix 3ffe:b00:ffff:ffff::/96 >> >> so shouldn't this command: >> >> ipv6 nat v4v6 source 172.10.30.1 3000:b000:ffff:ffff::a >> >> be >> >> ipv6 nat v4v6 source 172.10.30.1 3ffe:b00:ffff:ffff::a >> >> ??? >> >> >> Thak you. >> >> Gian Paolo >>_______________________________________________ >> For more information regarding industry leading CCIE Lab training, please >> visit www.ipexpert.com >> > > > > -- > Regards, > > Joe Astorino CCIE #24347 (R&S) > Sr. Technical Instructor - IPexpert > Mailto: [email protected] > Telephone: +1.810.326.1444 > Live Assistance, Please visit: www.ipexpert.com/chat > eFax: +1.810.454.0130 > > IPexpert is a premier provider of Classroom and Self-Study Cisco CCNA > (R&S, Voice & Security), CCNP, CCVP, CCSP and CCIE (R&S, Voice, > Security & Service Provider) Certification Training with locations > throughout the United States, Europe and Australia. Be sure to check > out our online communities at www.ipexpert.com/communities and our > public website at www.ipexpert.com > -- Regards, Joe Astorino CCIE #24347 (R&S) Sr. Technical Instructor - IPexpert Mailto: [email protected] Telephone: +1.810.326.1444 Live Assistance, Please visit: www.ipexpert.com/chat eFax: +1.810.454.0130 IPexpert is a premier provider of Classroom and Self-Study Cisco CCNA (R&S, Voice & Security), CCNP, CCVP, CCSP and CCIE (R&S, Voice, Security & Service Provider) Certification Training with locations throughout the United States, Europe and Australia. Be sure to check out our online communities at www.ipexpert.com/communities and our public website at www.ipexpert.com _______________________________________________ For more information regarding industry leading CCIE Lab training, please visit www.ipexpert.com _______________________________________________ For more information regarding industry leading CCIE Lab training, please visit www.ipexpert.com
