Title

  Test IKEv2.EN.R.1.3.2.1: Receipt of retransmitted INFORMATIONAL request
  Part A: (BASIC)


Purpose

  To verify an IKEv2 device properly handles the retransmission.


References

  * [RFC 4306] - Sections 1.1.2, 1.4 and 2.1


Test Setup

  * Network Topology
      Connect the devices according to the Common Topology.
  * Configuration
      In each part, configure the devices according to the Common Configuration.
  * Pre-Sequence and Cleanup Sequence
      IKEv2 on the NUT is disabled after each part.


Procedure

   NUT                  TN1
(End-Node)           (End-Node)
    |                    |
    |<-------------------| IKE_SA_INIT request (HDR, SAi1, KEi, Ni)
    |                    | (Packet #1)
    |------------------->| IKE_SA_INIT response (HDR, SAr1, KEr, Nr)
    |                    | (Judgement #1)
    |                    |
    |<-------------------| IKE_AUTH request (HDR, SK {IDi, AUTH, N, SAi2, TSi, TSr})
    |                    | (Packet #2)
    |------------------->| IKE_AUTH response (HDR, SK {IDr, AUTH, N, SAr2, TSi, TSr})
    |                    | (Judgement #2)
    |                    |
    |<-------------------| INFORMATIONAL request (HDR, SK {})
    |                    | (Packet #3)
    |------------------->| INFORMATIONAL response (HDR, SK {})
    |                    | (Judgement #3)
    |                    |
    |                    * wait until retrans timer expires
    |------------------->| INFORMATIONAL response (HDR, SK {})
    |                    | (Judgement #4)
    |                    |
    |<-------------------| INFORMATIONAL request (HDR, SK {})
    |                    | (Packet #4)
    |------------------->| INFORMATIONAL response (HDR, SK {})
    |                    | (Judgement #3)
    |                    |
    V                    V

N: USE_TRANSPORT_MODE
Packet #1 See Common Packet #1
Packet #2 See Common Packet #3
Packet #3 See Common Packet #17
Packet #4 See Common Packet #17
(same Message ID as packet #3)

  Part A: (BASIC)
     1. TN1 starts to negotiate with NUT by sending IKE_SA_INIT request.
     2. Observe the messages transmitted on Link A.
     3. After reception of IKE_SA_INIT response from the NUT, TN1 transmits an IKE_AUTH
         request to the NUT.
     4. Observe the messages transmitted on Link A.
     5. TN1 transmits an INFORMATIONAL request with no payloads.
     6. Observe the messages transmitted on Link A.
     7. Observe the messages transmitted on Link A.
     8. TN1 transmits an INFORMATIONAL request with no payloads. The Message ID is the
         same as step 5.
     9. Observe the messages transmitted on Link A.


Observable Result

  Part A
       Step 2: Judgment #1
       The NUT transmits an IKE_SA_INIT response including "ENCR_3DES",
       "PRF_HMAC_SHA1", "AUTH_HMAC_SHA1_96" and "D-H group 2" as accepted
       algorithms.
       Step 4: Judgment #2
       The NUT transmits an IKE_AUTH response including "ENCR_3DES",
       "AUTH_HMAC_SHA1_96" and "No Extended Sequence Numbers" as accepted algorithms.
       Step 6: Judgment #3
       The NUT transmits an INFORMATIONAL response followed by an Encrypted payload with
       no payloads contained in it.
       Step 7: Judgment #4
       The NUT never retransmits an INFORMATIONAL response followed by an Encrypted
       payload with no payloads contained in it.
       Step 9: Judgment #5
       The NUT transmits an INFORMATIONAL response followed by an Encrypted payload with
       no payloads contained in it.


Possible Problems

  * None.