NAME

  Test v6LC.2.2.16 - Router Advertisement Processing, Neighbor Cache (Hosts Only)
  Part J: RA with SLLA unchanged, NCE STALE

Purpose

  Verify that a host properly updates its Neighbor Cache upon receipt of a Router
  Advertisement.

References

  * [ND]  Sections 6.3.4 and 7.3.3

Resource Requirements

  * Packet generator
  * Monitor to capture packets

Test Setup

  No Common Test Setup is performed. Wait at least 3 seconds
  (MAX_MULTICAST_SOLICIT * RETRANS_TIMER) after any previous cleanup to make sure all
  previous NCE's are in state No NCE. The Common Test Cleanup procedure is performed after each
  part.

Router Solicitation A
IPv6 Header
Next Header: 58
Source Address: TR1's Link-local Address

Router Advertisement
Router Lifetime: 0 seconds
Reachable Time: 10 seconds
Retransmit Interval: 1 second
Source Link-layer Option

Echo Request B
IPv6 Header
Next Header: 58
Source Address: TR1's link-local Address
Destination Address: HUT's link-local Address

ICMPv6 Echo Request

Neighbor Advertisement C
IPv6 Header
Next Header: 58
Source Address: TR1's Link-local Address
Destination Address: HUT's Link-local Address

Neighbor Advertisement
Router flag: 1
Solicited flag: 1
Override flag: 1
Target Address: TR1's Link-local Address

Router Solicitation A
IPv6 Header Next Header: 58 Source Address: TR1's Link-local Address
Router Advertisement Router Lifetime: 0 seconds Reachable Time: 10 seconds Retransmit Interval: 1 second Source Link-layer Option

Echo Request B
IPv6 Header Next Header: 58 Source Address: TR1's link-local Address Destination Address: HUT's link-local Address
ICMPv6 Echo Request

Neighbor Advertisement C
IPv6 Header Next Header: 58 Source Address: TR1's Link-local Address Destination Address: HUT's Link-local Address
Neighbor Advertisement Router flag: 1 Solicited flag: 1 Override flag: 1 Target Address: TR1's Link-local Address

Procedure

  Part J: RA with SLLA unchanged, NCE STALE
   43. Repeat Steps 35 through 42, transmitting Router Advertisement A in Step 40 with the same
       Source Link-layer Address.
   44. Check the NCE of TR1 on the HUT and observe the packets transmitted by the HUT.

Observable Results

  Part J
   Step 36:
   The HUT should create a Neighbor Cache Entry for TR1 and set the state of the
   Entry to INCOMPLETE. The HUT should send a multicast Neighbor Solicitation to TR1.

   Step 38:
   The HUT should update the state of TR1's NCE to REACHABLE and record
   TR1's Link-layer Address. Because the HUT is in state REACHABLE, after receiving the
   earlier Echo Request from TR1, the HUT should send an Echo Reply using the received
   Link-Layer Address. After DELAY_FIRST_PROBE_TIME, the NUT should not send a
   unicast Neighbor Solicitation to TR1.

   Step 42:
   The HUT must change the state of the TR1's NCE to STALE and update TR1's
   Link-Layer Address according to the received Router Advertisement. Because the HUT's
   NCE for TR1 is in state STALE, the HUT should send an Echo Reply to TR1 using the
   unchanged Link-Layer Address and enter state DELAY. After
   DELAY_FIRST_PROBE_TIME, the NUT should send a unicast Neighbor Solicitation to
   TR1.

Possible Problems

  * None.