RA w/ Preference=HIGH vs. RA w/ Preference=LOW, Route Information Option (Link1:Preference=HIGH)
Host
raHIGH_rtinfoHIGH.seq [-tooloption ...] -pkt RTINFO.def
-tooloption: v6eval tool option
HOST2 | ---------------+-----------+--- Link2 | RT3 HOST1 | | -------+-------+-------+---+--- Link1 | | RT2 RT1 | | -------+-------+-------+------- Link0 | NUT
Link0 global 3ffe:501:ffff:100::/64 Testing link Link1 global 3ffe:501:ffff:101::/64 other link Link2 global 3ffe:501:ffff:102::/64 other link RT1(Link0) global 3ffe:501:ffff:100::a0a0 Alternative router link-local fe80::200:ff:fe00:a0a0 ether 00:00:00:00:a0:a0 RT2(Link0) global 3ffe:501:ffff:100::a1a1 Alternative router link-local fe80::200:ff:fe00:a1a1 ether 00:00:00:00:a1:a1 HOST1 global 3ffe:501:ffff:101::1 Host on Link1 HOST2 global 3ffe:501:ffff:102::1 Host on Link2
Flush Default Router List Flush Routing Table Flush Neighbor Cache Flush Prefix List
NUT RT1 RT2 HOST1 HOST2 | | | | | ==================(INITIALIZE)=================== | | | | | | Pref=HIGH| | | | |<--------------+ | | | RA from RT1 | | Link1Pref=HIGH| | | | | Pref=LOW| | | |<------------------------------+ | | RA from RT2 | | | | | |<--------------#-----------------------+ | Echo Request (via RT1) +-------------------------------#------>| | Echo Reply (via RT2)(*1) | | | | | |<--------------#-------------------------------+ Echo Request (via RT1) +---------------#------------------------------>| Echo Reply (via RT1)(*2) | | | | | | | | | | ==================(INITIALIZE)=================== | | | | | | Link1Pref=HIGH| | | | | Pref=LOW| | | | |<--------------+ | | | RA from RT1 | | Pref=HIGH| | | |<------------------------------+ | | RA from RT2 | | | | | |<--------------#-----------------------+ | Echo Request (via RT1) +---------------#---------------------->| | Echo Reply (via RT1)(*3) | | | | | |<--------------#-------------------------------+ Echo Request (via RT1) +-------------------------------#-------------->| Echo Reply (via RT2)(*4) | | | | | | | | | |
(INITIALIZATION) 1. RT1 Sends RA w/ Preference=HIGH 2. RT2 Sends RA w/ Preference=LOW, RouteInfoOption(Link1:Preference=HIGH) 3. HOST1 Sends Echo Request 4. NUT Sends Echo Reply to HOST1 via RT2(*1) 5. HOST2 Sends Echo Request 6. NUT Sends Echo Reply to HOST2 via RT1(*2) (INITIALIZATION) 2. RT1 Sends RA w/ Preference=LOW, RouteInfoOption(Link1:Preference=HIGH) 8. RT2 Sends RA w/ Preference=HIGH 9. HOST1 Sends Echo Request 10. NUT Sends Echo Reply to HOST1 via RT1(*3) 11. HOST2 Sends Echo Request 12. NUT Sends Echo Reply to HOST2 via RT2(*4)
(*1) PASS: HOST1 receives Echo Reply via RT2
(*2) PASS: HOST2 receives Echo Reply via RT1
(*3) PASS: HOST1 receives Echo Reply via RT1
(*4) PASS: HOST2 receives Echo Reply via RT2
ROUTE.pm RTINFO.def