NAME

hostRecvRedirect4RFlag - Verifying Redirect (to a better router) vs. IsRouter flag

TARGET

Host only

SYNOPSIS

  hostRecvRedirect4RFlag.seq [-tooloption ...]
                              -p hostRecvRedirect4RFlag.def

INITIALIZATION

1. Clear IPv6 routes.
2. Set R1 as the default router by sending RA and NA.
3. Set TN as the second router by sending RA and NA.

  TN                 NUT
  ----------------------


  State: NONCE (for R1, TN)


  ==== unsolicited RA ===>
       src=R1's link-local
       dst=all-node
       M=0, O=0
       RouterLifetime=600
       ReachableTime=0
       RetransTimer=0
       w/ SLLA
       Prefix Option:
           L=1, A=1
           ValidLifetime=2592000
           PreferredLifetime=604800
           Prefix=3ffe:501:ffff:100::/64


  State: STALE (for R1), NONCE (for TN)


  ==== solicited NA ===>
        src=R1's link-local
        dst=NUT's link-local
        R=1, S=1, O=1
        target=R1's link-local
        TLLA=R1's LLA


  State: REACHABLE (for R1), NONCE (for TN)


  ==== unsolicited RA ===>
       src=TN's link-local
       dst=all-node
       M=0, O=0
       RouterLifetime=600
       ReachableTime=0
       RetransTimer=0
       w/ SLLA
       Prefix Option:
           L=1, A=1
           ValidLifetime=2592000
           PreferredLifetime=604800
           Prefix=3ffe:501:ffff:100::/64


  State: REACHABLE (for R1), STALE (for TN)


  ==== solicited NA ===>
        src=TN's link-local
        dst=NUT's link-local
        R=1, S=1, O=1
        target=TN's link-local
        TLLA=TN's LLA


  State: REACHABLE (for R1, TN)


  Wait (3 sec) for DAD NS

TEST PROCEDURE

hostRecvRedirect4RFlag verifies that an entry of Destination Cache updated by a redirect message (ICMP Target != ICMP Destination) is removed by NA w/ RFlag=0.

1. Send echo-request (src:H1, dst:NUT)
2. Verify that NUT send echo-reply to the default router, R1
3. Send redirect message to NUT.
4. Send echo-request (src:H1, dst:NUT) again.
5. Verify that NUT threw send echo-reply to the better router, TN.
6. Send NA whose R flag is 0.
7. Send echo-request (src:H1, dst:NUT) again.
8. Verify that NUT send echo-reply to the default router, R1

  TN               NUT
  ----------------------


  State: REACHABLE (for R1, TN)


  ==== echo-request ===>
       src=H1(off-link global), prefix=3ffe:501:ffff:109::/64,
           but LLA is R1's one
       dst=NUT's global, prefix=3ffe:501:ffff:100::/64


  <=== Judgment #1: echo-reply ====
       src=NUT's global, prefix=3ffe:501:ffff:100::/64
       dst=H1(off-link global), prefix=3ffe:501:ffff:109::/64,
           but LLA is R1's one


  ==== redirect ===>
       src=R1's link-local
       dst=NUT's link-local
       icmp target=TN's link-local
       icmp destination=H1's global
       w/  TLLA
       w/o Redirected header


  ==== echo-request ===>
       src=H1(off-link global), prefix=3ffe:501:ffff:109::/64,
           but LLA is R1's one
       dst=NUT's global, prefix=3ffe:501:ffff:100::/64


  <=== Judgment #2: echo-reply ====
       src=NUT's global, prefix=3ffe:501:ffff:100::/64
       dst=H1(off-link global), prefix=3ffe:501:ffff:109::/64,
           but LLA is TN's one


  ==== solicited NA ===>
        src=TN's link-local
        dst=NUT's link-local
        R=0, S=1, O=1
        target=TN's link-local
        TLLA=TN's LLA


  ==== echo-request ===>
       src=H1(off-link global), prefix=3ffe:501:ffff:109::/64,
           but LLA is R1's one
       dst=NUT's global, prefix=3ffe:501:ffff:100::/64


  <=== Judgment #1: echo-reply ====
       src=NUT's global, prefix=3ffe:501:ffff:100::/64
       dst=H1(off-link global), prefix=3ffe:501:ffff:109::/64,
           but LLA is R1's one

JUDGMENT

  1. NUT must throw echo-reply whose destination is off-link global
    to the default router (i.e. R1).

  2. NUT must throw echo-reply to the better router (i.e. TN).

TERMINATION

  Send RAs to clear the Default Router List:
  - RA (src=R1) with RouterLifetime=0
  - RA (src=TN) with RouterLifetime=0

  Clear IPv6 routes by remote command. XXX

NOTE

  The test invokes the following command:
  - Clear IPv6 routes

SEE ALSO

  perldoc V6evalTool
  perldoc V6evalRemote