Chapter 6 Neighbor Discovery 131 Network Monitor Capture Here is an example of a Redirected Header option used in a Redirect message as displayed by Network Monitor 3.1(capture 06_03 in the \NetworkMonitorCaptures folder on the companion CD-ROM Frame: Ethernet:Etype IPv6 Ipv6:Next Protocol ICMPv6,Payload Length 128 Icmpv6:Redirect,Target -FE80:0:0:0:2B0:DOFF:FE23:4735 MessageType:Redirect,137(0x89) Redirect: Code:0 (0x0) Checksum:31003 (0x791B) Reserved:0 (0x0) TargetAddress:FE80:0:0:0:2BO:DOFF:FE23:4735 DestAddress:2001:DB8:0:0:0:0:0:1 RedirectedHeader: Type:Redirected Header,4(0x4) Length:11,in unit of 8 octets Reserved:0 (0x0) InvokingPacket:Next Protocol ICMPv6,Payload Length 40 Versions:IPv6,Internet Protocol,DSCP 0 Version: (0110............................)IPv6,Internet Protocol, 6(0x6) DSCP: (....000000......................)Differentiated services codepoint 0 ECT: (..........0.....................)ECN-Capable Transport not set CE: (......0............)ECN-CE not set F1 owLabe:(......00000000000000000000)0 PayloadLength:40 (0x28) NextProtocol:ICMPv6,58(0x3a) HopLimit:128 (0x80) SourceAddress:FE80:0:0:0:260:8FF:FE52:F9D8 DestinationAddress:3000:0:0:0:0:0:0:1 OriginalIPPayload:Binary Large Object (40 Bytes) MTU Option The MTU option is sent in Router Advertisement messages to indicate the IPv6 MTU of the link.This option is typically used when the IPv6 MTU for a link is not well known or needs to be set because of a translational or mixed-media bridging configuration.The MTU option overrides the IPv6 MTU reported by the interface hardware. In bridged or Layer-2 switched environments,it is possible to have different link-layer technol- ogies with different link-layer MTUs on the same link.In this case,differences in IPv6 MTUs between nodes on the same link are not detected through Path MTU Discovery.The MTU option is used to indicate the highest IPv6 MTU supported by all link-layer technologies on the link.￾    ￾  !" #$%&' ()*+) )&$+&!,)! ()*+# - )$% .)/. 0+1&23&!+&4567* $+,89:84!+;<0+1&23&!+&= $+,'&%)&!+;*&#$ !&! =>?(@3AB CDEFGH  I JKLGDMGKH JKNOGPQRST I QOSTH UGVK RDWKWXWYPQZ[RST\ RENYWE] ^GM_KLP`ab c QXFOSTH dG]eDGXK\ fED_GKPCJbgHgHgHgHahgHigCCHCJajHkljm [GnnE_GfNOGH dG]eDGXK\ `jlogVbpq c dG]eDGXKH  ZW]GHgogVgq ZLGXrnsFH j`ggj ogVlp`hq dGnGDSG]HgogVgq fED_GKt]]DGnnH CJbgHgHgHgHahgHigCCHCJajHkljm iGnKt]]DGnnH agg`HihbHgHgHgHgHgH` c dG]eDGXKG]uGE]GDH  fNOGH dG]eDGXKG] uGE]GD\ kogVkq ^GM_KLH ``\ eM sMeK WvbWXKGKn dGnGDSG]HgogVgq c QMSWreM_REXrGKH UGVK RDWKWXWYPQZ[RST\ RENYWE] ^GM_KLPkg c wGDneWMnH QRST\ QMKGDMGK RDWKWXWY\ ixZR g wGDneWMH og``gyyyyyyyyyyyyyyyyyyyyyyyyyyyyq QRST\ QMKGDMGK RDWKWXWY\ TogVTq ixZRH oyyyyggggggyyyyyyyyyyyyyyyyyyyyyyq ievvGDGMKeEKG] nGDSeXGn XW]GOWeMK g JZfH oyyyyyyyyyygyyyyyyyyyyyyyyyyyyyyyq JZUcZEOEzYG fDEMnOWDK MWK nGK ZJH oyyyyyyyyyyygyyyyyyyyyyyyyyyyyyyyq JZUcZJ MWK nGK CYW{^EzGH oyyyyyyyyyyyyggggggggggggggggggggq g RENYWE]^GM_KLH kg ogVabq UGVKRDWKWXWYH QZ[RST\ mbogVjEq uWO^eFeKH `ab ogVbgq xWsDXGt]]DGnnH CJbgHgHgHgHaTgHbCCHCJmaHCpib iGnKeMEKeWMt]]DGnnH jgggHgHgHgHgHgHgH` |De_eMEYQRRENYWE]H heMEDN ^ED_G |z}GXK okg hNKGnq ~€ ;3‚&$+&!!+!(&,+ƒ)„+#!+# -+&!)* ++;…†„93‚&'+; %!25;&$+&!+.$* %%.,)1;!+;…†„93‚'& %!2!&+1%%2!&1!&!)+& /+/* ,&' + !% +&! %&#")?#) /)-!-*&!'-, +&!5;3‚&$+&! &„)+;…†„93‚$&+)/.+;!+' *; )1 5 …!/)-)&‡ .?ˆ1+*;)!„&!#!+‰+$&/%+&; „)''!+%!2?% .+*;!&%? &-1+;)''!+%!2?% .3‚&!+; #%!25…!+;* ‰)''!*!…†„93‚ /+1!!&)&!+; #%!2 !&+)+*+)+;&,-;† +;3‚>*&„.5;3‚ &$+&!,)+&!)* ++;;-;+…†„93‚,$$&+)/. %%%!2?% .+*;!&%&-&! +;%!25