Also motivated by http://marc.info/?l=openbsd-misc&m=146239072929264&w=2
RFC4191 defines route preference flags not only in Route Information options, but also in Router Advertisement messages. Let's try to make this clear. Also, try to document the possible values in a slightly more useful way... Comments / oks? Index: rtadvd.conf.5 =================================================================== RCS file: /cvs/src/usr.sbin/rtadvd/rtadvd.conf.5,v retrieving revision 1.35 diff -u -p -p -u -r1.35 rtadvd.conf.5 --- rtadvd.conf.5 21 Apr 2015 16:32:24 -0000 1.35 +++ rtadvd.conf.5 6 May 2016 19:25:15 -0000 @@ -116,6 +116,22 @@ and Bit 6 .Li 0x40 .Pc means Other stateful configuration flag bit. +Bit 4 +.Po +.Li 0x10 +.Pc +and +Bit 3 +.Po +.Li 0x08 +.Pc +are used to encode the route preference for the route as follows: +.Bl -column "0x08" "High" -offset indent +.It 0x08 Ta "High" +.It 0x00 Ta "Medium" Pq default +.It 0x18 Ta "Low" +.El +.Pp The default value is 0. .It Cm \&rltime (num) Router lifetime field @@ -252,18 +268,7 @@ The default value is 64. .It Cm \&rtflags (str or num) A 8-bit flags field in route information option. Currently only the preference values are defined. -The notation is same as that of the raflags field. -Bit 4 -.Po -.Li 0x10 -.Pc -and -Bit 3 -.Po -.Li 0x08 -.Pc -are used to encode the route preference for the route. -The default value is 0x00, i.e., medium preference. +The notation for those is same as that of the raflags field. .It Cm \&rtltime (num) route lifetime field in route information option. .Pq unit: seconds . -- jca | PGP : 0x1524E7EE / 5135 92C1 AD36 5293 2BDF DDCC 0DFA 74AE 1524 E7EE
