HI Shariq!
Thanks a lot for ur suggestion!
Yes, you are right, the the router adv interval of the test information I gave yesterday was set as min. 0.03s to max. 0.07s.
I also did some tests with different router adv interval of radvd, although there were less Router adv. between BA and HoT, still got the same time delay problem.
================= router adv interval ============== ====
min. max. delay (average) -------------------------------------------------------------------------------------- Test1. 1 3 0.58s Test2. 0.5 1.5 0.60s Test3. 0.03 0.07 0.55s ===================================================
I tested with three different router adv set as shown in the above table, each test I did ten times. The delay between BA and HoT(the start of RRP) took place all the same, with the average value about 0.5s-0.6s.
I show the package information below:
Test1.the router adv interval with min 1s, max 3s, the delay is about 0.4s as blue coloured componet.
=========================================================================================
Seq. time Source Address Dist. Address
......
178 61.313759
fe80::202:2dff:fe07:9948 ff02::1:ff5f:163e
ICMPv6 Neighbor solicitation
179
61.313859 2001:106:1100:0:204:23ff:fe5f:163e
fe80::202:2dff:fe07:9948 ICMPv6 Neighbor
advertisement
180 61.315936
2001:106:1200::1
2001:106:1100:0:204:23ff:fe5f:163e MIPv6 Binding
Acknowledgement
------------------------------------------------------------------------------------ 181 61.783381 fe80::204:23ff:fe5f:163e
fe80::202:2dff:fe20:cf70 ICMPv6 Neighbor
solicitation
182 61.787571
2001:106:1200::2
2001:106:2600::2 ICMPv6 Echo
request
183 61.791291
2001:106:2600::2
2001:106:1200::2 ICMPv6 Echo
reply
---------------------------------------------------------------------------------------
184 61.793744 2001:106:1200::2
2001:106:2600::2 MIPv6 Home
Test Init
185 61.794847
2001:106:1100:0:204:23ff:fe5f:163e
2001:106:2600::2 MIPv6
Care-of Test Init
186 61.796708
2001:106:2600::2
2001:106:1200::2 MIPv6 Home
Test
187 61.797996
2001:106:2600::2
2001:106:1100:0:204:23ff:fe5f:163e MIPv6 Care-of
Test
188 61.801679
2001:106:1100:0:204:23ff:fe5f:163e
2001:106:2600::2 MIPv6
Binding Update
189 61.805637
2001:106:2600::2
2001:106:1100:0:204:23ff:fe5f:163e MIPv6 Binding
Acknowledgement
==================================================================================
Test2.the router adv interval with min 0.5s, max 1.5s, the worst delay is about 0.55s as blue coloured componet.
======================================================================================
Seq. time Source Address Dist. Address
......
36 10.950150
fe80::202:2dff:fe07:9948
ff02::1
ICMPv6 Router advertisement
37
11.273683 fe80::202:2dff:fe07:9948
ff02::1:ff5f:163e ICMPv6 Neighbor
solicitation
38 11.273755
2001:106:1100:0:204:23ff:fe5f:163e fe80::202:2dff:fe07:9948
ICMPv6 Neighbor advertisement
39
11.276329 2001:106:1200::1
2001:106:1100:0:204:23ff:fe5f:163e MIPv6 Binding
Acknowledgement
---------------------------------------------------------------------------------------- 40 11.804624
2001:106:1200::2
2001:106:2600::2 ICMPv6 Echo
request
41 11.808374
2001:106:2600::2
2001:106:1200::2 ICMPv6 Echo
reply
----------------------------------------------------------------------------------------
42 11.811183 2001:106:1200::2
2001:106:2600::2 MIPv6 Home
Test Init
43 11.812324
2001:106:1100:0:204:23ff:fe5f:163e
2001:106:2600::2 MIPv6
Care-of Test Init
44 11.814719
2001:106:2600::2
2001:106:1200::2 MIPv6 Home
Test
45 11.816481
2001:106:2600::2
2001:106:1100:0:204:23ff:fe5f:163e MIPv6 Care-of
Test
46 11.820768
2001:106:1100:0:204:23ff:fe5f:163e
2001:106:2600::2 MIPv6
Binding Update
47 11.823915
2001:106:2600::2
2001:106:1100:0:204:23ff:fe5f:163e MIPv6 Binding
Acknowledgement
=========================================================================================
Test2. router adv interval: 0.5s--1.5s. A better result is as follows, this delay took 0.08s.
======================================================================================
Seq. time Source Address Dist. Address
.....................
199 54.598008
fe80::202:2dff:fe07:9948 ff02::1:ff5f:163e
ICMPv6 Neighbor solicitation
200
54.598103 2001:106:1100:0:204:23ff:fe5f:163e
fe80::202:2dff:fe07:9948 ICMPv6 Neighbor
advertisement
201 54.602306
2001:106:1200::1
2001:106:1100:0:204:23ff:fe5f:163e MIPv6 Binding
Acknowledgement
---------------------------------------------------------------------------------------- 202 54.681097
2001:106:1200::2
2001:106:2600::2 ICMPv6 Echo
request
203 54.684725
2001:106:2600::2
2001:106:1200::2 ICMPv6 Echo
reply
----------------------------------------------------------------------------------------
204 54.687158 2001:106:1200::2
2001:106:2600::2 MIPv6 Home
Test Init
205 54.688245
2001:106:1100:0:204:23ff:fe5f:163e
2001:106:2600::2 MIPv6
Care-of Test Init
206 54.690599
2001:106:2600::2
2001:106:1200::2 MIPv6 Home
Test
207 54.692981
2001:106:2600::2
2001:106:1100:0:204:23ff:fe5f:163e MIPv6 Care-of
Test
208 54.695182
2001:106:1100:0:204:23ff:fe5f:163e
2001:106:2600::2 MIPv6
Binding Update
209 54.698293
2001:106:2600::2
2001:106:1100:0:204:23ff:fe5f:163e MIPv6 Binding
Acknowledgement
========================================================================================
Expect more explanation about this. Thanks again！
Best regards
Tian
From: shariq haseeb <[EMAIL PROTECTED]>
To: tian tian <[EMAIL PROTECTED]>
Subject: Re: [mipl] handover time problem: time delay between HA'BA and the start of RRP?
Date: Thu, 22 Mar 2007 21:15:33 -0700 (PDT)
>Hi Tian,
>
>Try this. Try to reduce the router adv interval. I
>think you are currently sending RADVDs every few
>miliseconds.
>
>Could you try to reduce that and see how much is the
>delay. It could be that the RADVDS have been present
>and they were in a buffer so your Mobile Node is
>processing that.
>
>Anyways good observation, i will try to give a more
>solid explanation after few tests.
>
>rgds,
>Shariq
>--- tian tian <[EMAIL PROTECTED]> wrote:
>
>
>---------------------------------
>
>Hi!
>
>During the analysis of the handover latency of MIPv6,
>I got a confused question.
>
>A normal MIPv6 handover process is as follows:
>
>1.[movement Detection] --> 2.[Router Discovery] -->
>3.[Address Congifuration]-->4.[DAD]-
>->5.[HA Registration]-->6.[CN Registration]
>
>The first four componets are with no problems. So hier
>I just focus the last two components.
>
>The HA registration (the MN CoA registed to HA) time
>is defined as the transmission delay incurred during
>registration of the MN CoA with its HA. It begins from
>the MN sends BU to its HA until the MN receives the BA
>sent by HA.
>
>And then, the MN must start the Return Routability
>Procedure (RRP) before it sends a BU to CN.That is,
>the MN must first initiate the Home Test (HoT) and
>Care-of Test before it can send a BU to CN.
>
>But I observed from the package information catched by
>ethereal, there was always a time delay between the BA
>sent by HA and HoT (the start of RRP), one example is
>shown below:
>
>*fe80::202:2dff:fe07:9948 is the IPv6 address of the
>new Access Router (AR),
> 2001:106:1200::2 is the Home Address of MN
> 2001:106:1200::1 is the address of the HA
> 2001:106:2600::2 is CN's address
> 2001:106:1100:0:204:23ff:fe5f:163e is MN's CoA when
>it left its homenet and moved to a visitnet.
>
>========================================================================================
>1. Seq. time Sorce Address
>Distination Address
>-----------------------------------------------------------------------------------------
> .....
> 2243 114.215153 fe80::202:2dff:fe07:9948 ff02::1
> ICMPv6 Router advertisement
> 2244 114.275060 fe80::202:2dff:fe07:9948 ff02::1
> ICMPv6 Router advertisement
> 2245 114.331100 fe80::202:2dff:fe07:9948 ff02::1
> ICMPv6 Router advertisement
> 2246 114.367109 fe80::202:2dff:fe07:9948
>ff02::1:ff5f:163e ICMPv6 Neighbor solicitation
> 2247 114.367168 2001:106:1100:0:204:23ff:fe5f:163e
>fe80::202:2dff:fe07:9948 ICMPv6 Neighbor
>advertisement
> 2248 114.369291 2001:106:1200::1
>2001:106:1100:0:204:23ff:fe5f:163e MIPv6 Binding
>Acknowledgement (BA sent by HA to MN)
>---------------------------------------------------------------------------------------
> 2249 114.395042 fe80::202:2dff:fe07:9948 ff02::1
> ICMPv6 Router advertisement
> 2250 114.451152 fe80::202:2dff:fe07:9948 ff02::1
> ICMPv6 Router advertisement
> 2251 114.503107 fe80::202:2dff:fe07:9948 ff02::1
> ICMPv6 Router advertisement
> 2252 114.556071 fe80::202:2dff:fe07:9948 ff02::1
> ICMPv6 Router advertisement
> 2253 114.623126 fe80::202:2dff:fe07:9948 ff02::1
> ICMPv6 Router advertisement
> 2254 114.667084 fe80::202:2dff:fe07:9948 ff02::1
> ICMPv6 Router advertisement
> 2255 114.677178 2001:106:1200::2
>2001:106:2600::2 ICMPv6 Echo request
> 2256 114.680095 2001:106:2600::2
>2001:106:1200::2 ICMPv6 Echo reply
>----------------------------------------------------------------------------------------
> 2257 114.681259 2001:106:1200::2
>2001:106:2600::2 MIPv6 Home Test Init(RRP
>start)
> 2258 114.681454 2001:106:1100:0:204:23ff:fe5f:163e
>2001:106:2600::2 MIPv6 Care-of Test Init
> 2259 114.684111 2001:106:2600::2
>2001:106:1200::2 MIPv6 Home Test
> 2260 114.686225 2001:106:2600::2
>2001:106:1100:0:204:23ff:fe5f:163e MIPv6 Care-of
>Test
> 2261 114.686647 2001:106:1100:0:204:23ff:fe5f:163e
>2001:106:2600::2 MIPv6 Binding Update
> 2262 114.689347 2001:106:2600::2
>2001:106:1100:0:204:23ff:fe5f:163e MIPv6 Binding
>Acknowledgement (Handover completed)
>
>============================================================================================
>
>As shown in the above table, a delay of 0.32s is
>caused by the blue colored RAs sent by the AR and also
>ICMPv6 Echo request and reply between the BA sent by
>the HA and the start of RRP. And some other tests even
>got a worse delay time than this.
>
>What is this delay? Which fators are possible to cause
>this delay? Anyone has idea about it?
>
>Any suggestion will be very appreciated!
>
>
>Tian
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