[support] Destination Unreachable for BU

[Chulhyun Park]

Thanks Sebastien.

As you assumed, 2001:a:f:1::1000 is assigned to HA's eth2, and ipv6
forwarding is activated also.
Radvd runs on the HA, so if I radvdump at HA, I can see RA with
2001:a:f:1::/64 prefix at eth2.

I tried ping from both AR1 and AR2 to 2001:a:f:1::1000, and it works.
So it seems that connectivity between machines is not the reason of
the problem...

2008/10/2 Sebastien Decugis <sdecugis at hongo.wide.ad.jp>:
> Hello,
>
> Does the RA daemon (radvd) runs on your HA?
> I assume that the 2001:a:f:1::1000 address is actually configured on your
> HA's eth2 interface. Did you also activate IPv6 forwarding? Without your
> mip6d daemon running, can you ping your HA address (2001:a:f:1::1000) from
> your AR1 or AR2?
>
> Hope these checks will help you solving your problem...
>
> Best regards,
> Sebastien.
>
>
> Chulhyun Park a écrit :
>>
>> Hi. I'm Park.
>> I'm suffering from the problem that HA doesn't recognize bu from MR.
>> The test network diagram is like below.
>>
>>
>>
>>         MNN1                  MNN2
>>          |                      |
>>          +---------+  +---------+
>>  MNP1               |  | MNP2
>>  2001:a:f:2::/64    |  | 2001:a:f:3::/64
>>                    |  |
>>                     MR
>>                    |  |
>>  Access Network 1   |  |  Access network 2
>>  2001:a:c:1::/64    |  |  2001:a:d:1::/64
>>                    |  |
>>              +-----+  +-----+
>>              |              |
>>             AR1            AR2
>>              |              |
>>              +-----+  +-----+
>>  2001:a:a:1::/64    |  |  2001:a:a:2::/64
>>                   Router
>>                    |  |
>>  2001:a:e:1::/64    |  |  2001:b:a:1::/64
>>              +-----+  +-----+
>>              |              |
>>              HA             CN
>>   HA's ETH2 |
>>          ----+----- Home Link : 2001:a:f:1::/64
>>
>>
>> MR has four interfaces, two are connected to two separated mobile network,
>> and two are connected to different two access networks, access network 1
>> and 2.
>>
>> When MR boots up at the foreign network, it recognizes that it is in
>> foreign network
>> and sends two binding updates to HA (2001:a:f:1::1000) for each CoA
>> from AN1 and AN2.
>> But HA cannot receive any binding updates from the MR.
>>
>> I tried to tcpdump packet at all machines, AR1 or AR2 and Router and HA.
>> I could find binding update packets destined to the HA
>> (2001:a:f:1::1000), even at the HA itself.
>> Moreover, I also could see ICMPv6 destination address unreachable
>> message from HA to a CoA of MR.
>> HA can ping to the CoA of the MR, and as I connected another machine
>> beyond AR1 then
>> from that machine I also can ping to the HA. So it doesn't seem to be
>> a routing problem.
>>
>> I included my configuration for HA and MR. Would you find a problem
>> with my configuration?
>>
>> -----------------
>>  HA mip6d.conf
>> -----------------
>>
>> NodeConfig HA;
>> DebugLevel 1;
>> Interface "eth2";
>> HaAcceptMobRtr enabled;
>> HaAcceptMCoAReg enabled;
>>
>>
>> # Disable MPS/MPA
>> SendMobPfxAdvs enabled;
>> SendUnsolMobPfxAdvs enabled;
>>
>> # MNP configuration
>> HaServedPrefix 2001:a:f:1::/64;
>> BindingAclPolicy 2001:a:f:1::1 (2001:a:f:2::/64, 2001:a:f:3::/64) MCoAReg
>> allow;
>> DefaultBindingAclPolicy allow;
>>
>>
>> # IPsec configuration - NO IPSEC AT THE MOMENT
>> UseMnHaIPsec disabled;
>> KeyMngMobCapability disabled;
>>
>> # EOF
>>
>>
>>
>> -----------------
>>  MR mip6d.conf
>> -----------------
>>
>> NodeConfig MN;
>> DebugLevel 10;
>> DoRouteOptimizationCN disabled;
>> DoRouteOptimizationMN disabled;
>> SendMobPfxSols enabled;
>> UseCnBuAck enabled;
>>
>> # We use Explicit Mode
>> MobRtrUseExplicitMode enabled;
>> OptimisticHandoff enabled;
>>
>> # The Binding Lifetime, for example 20 seconds
>> MnMaxHaBindingLife 20;
>>
>> Interface "eth0" {
>>    Bid 100;
>>    BidPriority 20;
>>    Reliable true;
>> }
>>
>>
>> Interface "eth1" {
>>    Bid 101;
>>    BidPriority 10;
>>    Reliable true;
>> }
>>
>> # Replace eth0 with your egress interface
>> MnHomeLink "eth0" {
>>    IsMobRtr enabled;
>>    HomeAgentAddress 2001:a:f:1::1000;
>>    HomeAddress 2001:a:f:1::1/64 (2001:a:f:2::/64, 2001:a:f:3::/64);
>>    RegMultipleCoA enabled;
>>    IfMultipleCoA "eth0", "eth1";
>> }
>>
>> # IPsec configuration - NO IPSEC AT THE MOMENT
>> UseMnHaIPsec disabled;
>> KeyMngMobCapability disabled;
>> # EOF
>>
>>
>> Chulhyun Park, Ph.D Student
>> Multimedia and Mobile Communication Lab.
>> _______________________________________________
>> Support mailing list
>> Support at ml.nautilus6.org
>> http://ml.nautilus6.org/mailman/listinfo/support
>>
>>
>
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