[support] DAD Delay too high?

[support at adhari.de]

Hi Arnaud,
I performed the same tests on a fresh installed System (debian   /kernel 2.6.31)
Only MIP6 Support without NEMO or MCOA patches.I still have too high DAD delays (delay between the first Neighborhood Solicitation and the HomeAgent registration.)

 I made about 300 tests and had an average value of 2,95 seconds.

 Look at this case for example:The first Neighbor solicitation was sent at time 12.556429 and the Binding update more than 3 seconds later at 15.920365  

Any Idea? 

Merci beaucoup

 Hakim  



00:59:10.856905 fe80::201:2ff:fe1a:d2be -> ff02::1      ICMPv6 Router advertisement
00:59:10.859420           :: ->ff02::16     ICMPv6 Multicast ListenerReport Message v2
00:59:10.947435           :: ->ff02::2      ICMPv6 Router solicitation
00:59:10.948423           :: ->ff02::16     ICMPv6 Multicast ListenerReport Message v2
00:59:11.369853  2001:a:b::1 ->2001:a:b::1000 ICMPv6 Echo request
00:59:11.370763 2001:a:b::1000 -> 2001:a:b::1  ICMPv6 Echo reply
00:59:11.528376           :: ->ff02::1:ff1d:b521 ICMPv6 Neighbor solicitation
00:59:12.454521           :: ->ff02::2      ICMPv6 Router solicitation
00:59:12.537394 fe80::201:2ff:fea7:a651 -> ff02::1      ICMPv6 Router advertisement
00:59:12.537802 fe80::201:2ff:fea7:a651 -> ff02::1      ICMPv6 Router advertisement
00:59:12.538302 fe80::201:2ff:fea7:a651 -> ff02::1      ICMPv6 Router advertisement
00:59:12.538851 fe80::201:2ff:fea7:a651 -> ff02::1      ICMPv6 Router advertisement
00:59:12.539392           :: ->ff02::16     ICMPv6 Multicast ListenerReport Message v2
00:59:12.539418 fe80::201:2ff:fea7:a651 -> ff02::1      ICMPv6 Router advertisement
00:59:12.556429           :: ->ff02::1:ff1d:b521 ICMPv6 Neighbor solicitation
00:59:12.630719           :: ->ff02::2      ICMPv6 Router solicitation
00:59:13.148431           :: ->ff02::1:ff1d:b521 ICMPv6 Neighbor solicitation
00:59:13.370432  2001:a:b::1 ->2001:a:b::1000 ICMPv6 Echo request
00:59:13.618430 fe80::216:6fff:fe1d:b521 -> ff02::16     ICMPv6 Multicast Listener Report Messagev2
00:59:14.370462  2001:a:b::1 ->2001:a:b::1000 ICMPv6 Echo request
00:59:15.370475  2001:a:b::1 ->2001:a:b::1000 ICMPv6 Echo request
00:59:15.916589 fe80::201:2ff:fea7:a651 -> ff02::1      ICMPv6 Router advertisement
00:59:15.917068 fe80::201:2ff:fea7:a651 -> ff02::1      ICMPv6 Router advertisement
00:59:15.917439 fe80::201:2ff:fea7:a651 -> ff02::1      ICMPv6 Router advertisement
00:59:15.917936 fe80::201:2ff:fea7:a651 -> ff02::1      ICMPv6 Router advertisement
00:59:15.918380           :: ->ff02::16     ICMPv6 Multicast ListenerReport Message v2
00:59:15.920365  2001:a:b::1 ->2001:a:b::1000 MIPv6 Binding Update




   I adjusted my configuration files Here aremy configuration files: 


 
*********MobileNode*************
 
--------mip6d.conf:----------
 
   NodeConfig MN;
   DebugLevel 10;
   DoRouteOptimizationCN disabled;
   DoRouteOptimizationMN disabled;
   UseCnBuAck disabled;
 
   OptimisticHandoff disabled;
   MnRouterProbes 0;
   MnRouterProbeTimeout 0.02;
   MnMaxHaBindingLife 60;
 
  Interface "eth1" { 
MnIfPreference 1;   
  }
 
   MnHomeLink "eth1" {
        HomeAgentAddress 2001:a:b:0::1000;
        HomeAddress 2001:a:b:0::1/64(2001:a:b:1::/64);  }
 
   UseMnHaIPsec disabled;
   KeyMngMobCapability disabled;
 
 
 
 
*********HomeAgent*************
 
--------mip6d.conf:----------
 
   NodeConfig HA;
   DebugLevel 10;
   Interface "eth1";
   UseMnHaIPsec disabled;
   KeyMngMobCapability disabled;
 
--------Radvd.conf----------
 
   interface eth1
   {
        AdvSendAdvert on;
        MaxRtrAdvInterval 0.07;
        MinRtrAdvInterval 0.03;
        AdvIntervalOpt on;
        AdvHomeAgentFlag on;
        AdvHomeAgentInfo on;
        HomeAgentLifetime 1800;
        HomeAgentPreference 10;
        AdvMobRtrSupportFlag on;
        prefix 2001:a:b:0::1000/64
        {
                AdvRouterAddr on;
                AdvOnLink on;
                AdvAutonomous on;
        };
   };
 
 
 
*********ForeignRouter************* (the MN tryes to connect to this Router)
 
--------Radvd.conf----------
 
   interface eth3
   {
        AdvSendAdvert on;
        MaxRtrAdvInterval 0.07;
        MinRtrAdvInterval 0.03;
        AdvIntervalOpt on;
        prefix 2001:a:f2:1::1/64
        {
                AdvRouterAddr on;
                AdvOnLink on;
                AdvAutonomous on;
        };
   };
   
 Hi,

support at adhari.de writes:

> Hi Arnaud,
>
> I´m not sure if this problem have something to do with the
> DADRetransTimer. But I don´t know where to check this setting in order
> to exclude this possibilty. 
>
> Here are my configuration files: 
>
> *********MobileNode*************
>
> --------mip6d.conf:----------
>
>    NodeConfig MN;
>    DebugLevel 10;
>    DoRouteOptimizationCN disabled;
>    DoRouteOptimizationMN disabled;
>    UseCnBuAck disabled;
>
>    OptimisticHandoff disabled;
>    MnRouterProbes 0;
>    MnRouterProbeTimeout 0.02;
>    MnMaxHaBindingLife 60;
>
>   Interface "eth1" { 
>     	Bid 100; 
> 	BidPriority 10;
> 	Reliable true;

MCoA patch applied? Can you try w/o it to see if this is related?

a+