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Chapter 12 ISATAP At the end of this chapter,you should be able to do the following: ■Define the address format,encapsulation,and intended use of the Intra-Site Auto- matic Tunnel Addressing Protocol (ISATAP)IPv6 transition technology. ■Describe how the IPv6 protocol in Windows Server2008 and Windows Vista supports ISATAP as a host and router. ■List and describe the routes on ISATAP hosts,ISATAP routers,and IPv6 routers that make ISATAP-based communication possible. Describe how ISATAP communication works between ISATAP hosts and native IPv6 hosts on an intranet. ■Describe how to configure a computer running Windows Server2O08 or Windows Vista as an ISATAP router. ISATAP Overview ISATAP is an address assignment and host-to-host,host-to-router,and router-to-host auto- matic tunneling technology defined in RFC 4214 that provides unicast IPv6 connectivity between IPv6/IPv4 hosts across an IPv4 intranet.ISATAP hosts do not require any manual configuration,and they can create ISATAP addresses using standard IPv6 address autoconfig- uration mechanisms. ISATAP addresses have one of the two following formats: 64-bitUnicastPrefix:0:5EFE:w.x.y.z 64-bitUnicastPrefix:200:5EFE:w.x.y.z The ISATAP address consists of the following: ■64-bitUnicastPrefix is any64-bit unicast address prefix,including link-local,global,and unique local prefixes. ■：0：5EFE:w.x.y.zand:2oo:5EFE:w.x.y.g are the locally administered interface identifiers. For:0:5EFE:w.x.y.之，w.x.y.z is a private unicast IPv4 address.For:200:5EFE:w.x.y.z, w.x.y.z is a public unicast IPv4 address.The interface identifier (ID)portion of an ISATAP address contains an embedded IPv4 address that determines the destination IPv4 address in the encapsulating IPv4 header of ISATAP traffic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` _aabc^^ _^^]d`ec`f _`a gh^fifhigh^fj gh^fifhibhkfcbj _`a bhkfcbifhigh^f _kfhi e_f]l fk``cm]`d fclg`hmhdn aco]`ca ]` pqr stus fg_f vbhw]ac^ k`]l_^f X\wx lh``clf]w]fn ycfzcc` X\wx{X\ws gh^f^ _lbh^^ _` X\ws ]`fb_`cf| XYZ[Z\ gh^f^ ah `hf bc}k]bc _`n e_`k_m lh`o]dkb_f]h`j _`a fgcn l_` lbc_fc XYZ[Z\ _aabc^^c^ k^]`d ^f_`a_ba X\wx _aabc^^ _kfhlh`o]di kb_f]h` eclg_`]^e^| XYZ[Z\ _aabc^^c^ g_wc h`c ho fgc fzh ohmmhz]`d ohbe_f^~
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