Test v6LC.2.2.10 - Router Solicitation Processing, Neighbor Cache (Routers Only)
Part H: RS with SLLA changed, NCE PROBE
Verify that a router properly updates its Neighbor Cache upon receipt of a Router Solicitation.
* [ND] Sections 6.2.6 and 7.3.3
* Packet generator
* Monitor to capture packets
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: TN1's Link-local Address
Destination Address: All Router multicast address
|
Router Advertisement
Source Link-layer Option
|
Echo Request B
IPv6 Header
Next Header: 58
Source Address: TN1's link Address
Destination Address: HUT's Global Address
|
|
ICMPv6 Echo Request
|
Neighbor Advertisement C
IPv6 Header
Next Header: 58
Source Address: TR1's Link-local Address
Destination Address: RUT's Link-local Address
|
Neighbor Advertisement
Router flag: 0
Solicited flag: 1
Override flag: 1
|
Part H: RS with SLLA changed, NCE PROBE
30. TN1 transmits Echo Request B. TN1 does not respond to any Neighbor Solicitations from the
RUT.
31. Observe the packets transmitted by the RUT and check the NCE of TN1 on the RUT.
32. TN1 transmits Neighbor Advertisement C.
33. Check the NCE of TN1 on the RUT and observe the packets transmitted by the RUT.
34. Wait (REACHABLE_TIME * MAX_RANDOM_FACTOR) seconds.
35. TN1 transmits Echo Request B.
36. Check the NCE of TN1 on the RUT and observe the packets transmitted by the RUT.
37. Wait (DELAY_FIRST_PROBE_TIME) seconds.
38. Check the NCE of TN1 on the RUT and observe the packets transmitted by the RUT.
39. TN1 transmits Router Solicitation A with a different Source Link-layer Address.
40. TN1 transmits an Echo Request to the RUT.
41. Check the NCE of TN1 on the RUT and observe the packets transmitted by the RUT.
Part H
Step 31:
The RUT should create a Neighbor Cache Entry for TN1 and set the state of the
Entry to INCOMPLETE. The RUT should send a multicast Neighbor Solicitation to TN1.
Step 33:
The RUT should update the state of TN1's NCE to REACHABLE and record
TN1's Link-layer Address. Because the RUT is in state REACHABLE, after receiving the
earlier Echo Request from TN1, the RUT should send an Echo Reply using the received
Link-Layer Address. After DELAY_FIRST_PROBE_TIME, the RUT should not send a
unicast Neighbor Solicitation to TN1.
Step 36:
The RUT should update the state of TN1's NCE to STALE, send an Echo Reply to
TN1 using the same Link-Layer address and enter state DELAY.
Step 38:
The RUT should update the state of TN1's NCE to PROBE by sending a unicast
Neighbor Solicitation to TN1.
Step 41:
The RUT must change the state of the TN1's NCE to STALE and update TN1's
Link-Layer Address according to the received Router Solicitation. Because the RUT's NCE
for TN1 is in state STALE, the RUT should send an Echo Reply to TN1 using the new Link-
Layer Address and enter state DELAY. After DELAY_FIRST_PROBE_TIME, the RUT
should send a unicast Neighbor Solicitation to TN1.
* None.