130 Understanding IPv6,Second Edition RouterAdvertisement: SourceLinkLayerAddress: Type:Source Link-Layer Address,1(0x1) Length:1,in unit of 8 octets Address:00-B0-D0-23-47-33 MTU: PrefixInformation: PrefixInformation: Type:Prefix Information,3(0x3) Length:4,in unit of 8 octets PrefixLength:64 (0x40) -F1ags:192(0xC0) L:(1.......)On-Link determination allowed A: (.1......)Autonomous address-configuration R: (..0.....)Not router Address S: (...0....)Not a site prefix P: (....0...)Not a router prefix Rsv:(...000) ValidLifetime:4294967295 (0xFFFFFFFF) PreferredLifetime:4294967295 (OxFFFFFFFF) Reserved:0 (0x0) Prefix:FD43:2DA1:3FE9:2:0:0:0:0 Redirected Header Option The Redirected Header option is sent in Redirect messages to specify the IPv6 packet that caused the router to send a Redirect message.It can contain all or part of the redirected IPv6 packet,depending on the size of the IPv6 packet that was initially sent. Figure 6-7 shows the structure of the Redirected Header option Type =4 Length Reserved Portion of Redirected Packet... Figure 6-7 The structure of the Redirected Header option The following list describes the fields in the Redirected Header option: Type The value of this field is 4. Length The value of this field is the number of 8-byte blocks in the entire option. Reserved The Reserved field is a 48-bit field reserved for future use and set to 0. Portion of redirected packet This field contains either the IPv6 packet or a portion of the IPv6 packet that caused the Redirect message to be sent.The amount of the original packet that is included is the leading portion of the packet so that the entire Redirect message is no more than 1280 bytes in length.￾       !"#$%&  ' ()*"%+*,- ##&  .-/& () *"%+'*,-  ##0 123415 *%67& 10 "% %" 89)#  ##& 33':3';3'<='>?'==  @.A&   B8"4C%8$,"%&  ' B8"4C%8$,"%&  .-/& B8"4 C%8$,"%0 =234=5 *%67& >0 "% %" 89)# B8"4*%67& D> 234>35 ' EF,6#& 1G< 234H35 *& 21IIIIIII5 J%'*"%+ $"%,"% ,FFK  & 2I1IIIIII5 %$# , ##')%8"6,"% & 2II3IIIII5 L   ## (& 2III3IIII5 L,#" /8"4 B& 2IIII3III5 L, /8"4 #!& 2IIIII3335 M,F" *"8"$& ><G>GD?<GN 234EEEEEEEE5 B8 *"8"$& ><G>GD?<GN 234EEEEEEEE5 #! &323435 B8"4& E;>=&<;1&=EOG&<&3&3&3&3 P QRS  TUVWVXYZV[\VX]V^XVZ_`\Y_aYbbVa\YaWVXYZV[\cVbb^dVb\_b`V[Yef\UVghij`^[kV\\U^\ [^lbVX\UVZ_l\VZ\_bVaX^WVXYZV[\cVbb^dVmg\[^a[_a\^Ya^nn_Z`^Z\_e\UVZVXYZV[\VXghij `^[kV\oXV`VaXYad_a\UVbYpV_e\UVghij`^[kV\\U^\q^bYaY\Y^nnfbVa\m rYdlZVjstbU_qb\UVb\Zl[\lZV_e\UVWVXYZV[\VX]V^XVZ_`\Y_am u vwx yz{|}~€}~{‚}z{ƒ{„…~{€}{„†{‡„{~ˆ}…‰ TUVe_nn_qYadnYb\XVb[ZYŠVb\UVeYVnXbYa\UVWVXYZV[\VX]V^XVZ_`\Y_a‹ Œ ŽS TUVi^nlV_e\UYbeYVnXYbm Œ  ‘ TUVi^nlV_e\UYbeYVnXYb\UValcŠVZ_e’sŠf\VŠn_[kbYa\UVVa\YZV_`\Y_am Œ P  TUVWVbVZiVXeYVnXYb^’sŠY\eYVnXZVbVZiVXe_Zel\lZVlbV^aXbV\\_m Œ   S• TUYbeYVnX[_a\^YabVY\UVZ\UVghij`^[kV\_Z^`_Z\Y_a_e \UVghij`^[kV\\U^\[^lbVX\UVWVXYZV[\cVbb^dV\_ŠVbVa\mTUV^c_la\_e\UV_ZYdYa^n `^[kV\\U^\YbYa[nlXVXYb\UVnV^XYad`_Z\Y_a_e\UV`^[kV\b_\U^\\UVVa\YZVWVXYZV[\ cVbb^dVYba_c_ZV\U^a’Šf\VbYanVad\Um ™š› œ›žŸ  ¡›¢›£¤›¥ ¦§£Ÿ¨§§©¡›¥¨£›ªŸ›¥¦«ª¬›Ÿ ­® ¯¯¯