RA w/ Preference=MED vs. RA w/ Preference=HIGH, Route Information Option (LinkANY:Preference=LOW)
Host
raMED_rtinfoLOW_DEFAULT.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=MED| | | | |<---------------+ | | | RA from RT1 | | LinkANYPref=LOW| | | | | Pref=HIGH| | | |<--------------------------------+ | | RA from RT2 | | | | | |<---------------#------------------------+ | Echo Request (via RT1) +----------------#----------------------->| | Echo Reply (via RT1)(*1) | | | | | |<---------------#--------------------------------+ Echo Request (via RT1) +----------------#------------------------------->| Echo Reply (via RT1)(*2) | | | | | | | | | | ====================(INITIALIZE)=================== | | | | | | LinkANYPref=LOW| | | | | Pref=HIGH| | | | |<---------------+ | | | RA from RT1 | | Pref=MED| | | |<--------------------------------+ | | RA from RT2 | | | | | |<---------------#------------------------+ | Echo Request (via RT1) +---------------------------------#------>| | Echo Reply (via RT2)(*3) | | | | | |<---------------#--------------------------------+ Echo Request (via RT1) +---------------------------------#-------------->| Echo Reply (via RT2)(*4) | | | | | | | | | |
(INITIALIZATION) 1. RT1 Sends RA w/ Preference=MED 2. RT2 Sends RA w/ Preference=HIGH, RouteInfoOption(LinkANY:Preference=LOW) 3. HOST1 Sends Echo Request 4. NUT Sends Echo Reply to HOST1 via RT1(*1) 5. HOST2 Sends Echo Request 6. NUT Sends Echo Reply to HOST2 via RT1(*2) (INITIALIZATION) 7. RT1 Sends RA w/ Preference=HIGH, RouteInfoOption(LinkANY:Preference=LOW) 8. RT2 Sends RA w/ Preference=MED 9. HOST1 Sends Echo Request 10. NUT Sends Echo Reply to HOST1 via RT2(*3) 11. HOST2 Sends Echo Request 12. NUT Sends Echo Reply to HOST2 via RT2(*4)
[NOTIFICATION] LinkANY=(::/0)
(*1) PASS: HOST1 receives Echo Reply via RT1
(*2) PASS: HOST2 receives Echo Reply via RT1
(*3) PASS: HOST1 receives Echo Reply via RT2
(*4) PASS: HOST2 receives Echo Reply via RT2
ROUTE.pm RTINFO.def