Title

  Test IKEv2.EN.R.1.1.2.1: Receipt of retransmitted IKE_SA_INIT request
  Part A: (BASIC)


Purpose

  To verify an IKEv2 device transmits an IKE_SA_INIT response when the device received a
  retransmitted IKE_SA_INIT request.


References

  * [RFC 4306] - Sections 2.1, 2.2 and 2.4
  * [RFC 4718] - Sections 2.2 and 2.3


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)
    |                    |
    |                    * wait until retrans timer expires
    |---------X          | IKE_SA_INIT response (HDR, SAr1, KEr, Nr)
    |                    | (Judgement #2)
    |                    |
    |<-------------------| IKE_SA_INIT request (HDR, SAi1, KEi, Ni)
    |                    | (Packet #2)
    |------------------->| IKE_SA_INIT response (HDR, SAr1, KEr, Nr)
    |                    | (Judgement #3)
    |                    |
    V                    V

Packet #1 See Common Packet #1
Packet #2 See Common Packet #1
(The Message ID is the same as Packet #1)
  Part A: (BASIC)
     1. TN starts to negotiate with TN1 by sending IKE_SA_INIT request.
     2. Observe the messages transmitted on Link A.
     3. Observe the messages transmitted on Link A.
     4. TN1 retransmits same IKE_SA_INIT request as the message transmitted in Step 1 to the
        NUT.
     5. 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 3: Judgment #2
       The NUT never retransmits the same IKE_SA_INIT response as the response transmitted at
       Step 2.
       Step 5: Judgment #3
       The NUT transmits the same IKE_SA_INIT response as the response transmitted at Step 2.


Possible Problems

  * None.