# NAME

    RA w/ Preference=HIGH vs.
    RA w/ Preference=LOW, Route Information Option (Link1:Preference=LOW)

# TARGET

    Host

# SYNOPSIS

    raHIGH_rtinfoLOW.seq [-tooloption ...] -pkt RTINFO.def

>     -tooloption: v6eval tool option

# TOPOLOGY

>                                          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`

# INITIALIZATION

>     Flush Default Router List
>     Flush Routing Table
>     Flush Neighbor Cache
>     Flush Prefix List

# TEST PROCEDURE

>     NUT             RT1             RT2    HOST1  HOST2
>      |               |               |       |       |
>      ==================(INITIALIZE)===================
>      |               |               |       |       |
>      |      Pref=HIGH|               |       |       |
>      |<--------------+               |       |       | RA from RT1
>      |               |  Link1Pref=LOW|       |       |
>      |               |       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=LOW|               |       |       |
>      |       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=LOW)
    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=LOW)
    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)

# JUDGEMENT

    (*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

# SEE ALSO

    ROUTE.pm
    RTINFO.def