[support] "md_expire_router" problem in MR

Mon Nov 19 22:17:41 JST 2007

Hello,

The latest NEPL release (20071105) seems to have a little bug on the  
HA. Could you try the enclosed patch for the ha.c file, and recompile  
mip6d? This is only a workaround for the moment, I'll try to release a  
new version soon.

Regards,
-- 
Romain KUNTZ
kuntz at lsiit.u-strasbg.fr
Louis Pasteur University - Networks and Protocols Team

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On 2007/11/19, at 2:07, Rahman, Md Sazzadur wrote:

> Hello all,
> I am implementing NEMO test bed according to the latest how-to. When  
> I connect MR from HL to FL1, it successfully hands off and  
> connection between LFN and CN remains uninterrupted. However, after  
> some time of handoff, MR gets a periodic ?md_expire_router? in its  
> wireless interface. and sends BU to HA. Getting this BU, HA deletes  
> the existing tunnel. Again, after some time, MR gets  
> ?md_expire_router? in its interface and sends another BU to HA. This  
> time HA creates a tunnel between HA and MR and connection restores.  
> This toggle happens periodically.
>
> To resolve this problem, I made AdvIntervalOpt in routers radvd.conf  
> turned off but it didn?t help.
>
> Before using wireless interfaces in the test bed, I didn?t get this  
> problem, that means MR never reported ?md_expire_router? in its log  
> and tunnel was never deleted. But using wireless interfaces in the  
> test bed introduces this problem.
>
> I got another issue as well. When MnMaxHaBindingLife (suppose it is  
> 60 sec)expires in MR, it sends refresh BU to HA, but getting this  
> refresh BU, HA deletes the tunnel. Is this a expected behavior or I  
> have some problem in my test bed?
>
> I have also attached HA and MR output herewith this mail for  
> ?md_expire_router? problem.
>
> I would appreciate any help regarding these problems.
>
> Best Regards,
> Md Sazzadur Rahman
> Graduate Student,
> School of Computer Science,
> University of Oklahoma,
> Norman, Oklahoma, USA
>
> MR output:
>
> Fri Nov 16 13:23:00 md_expire_router: expiring router  
> fe80:0:0:0:214:22ff:feac:355e on iface wlan0 (5)
> Fri Nov 16 13:23:01 __md_discover_router: discover link on iface  
> wlan0 (5)
> Fri Nov 16 13:23:01 md_change_default_router: add new router  
> fe80:0:0:0:214:22ff:feac:355e on interface wlan0 (5)
> Fri Nov 16 13:23:01 md_update_router_stats: add coa 2001:a:c: 
> 1:290:5bff:feb2:dd0 on interface (5)Fri Nov 16 13:23:01  
> md_expire_router: expiring router fe80:0:0:0:214:22ff:feac:355e on  
> iface wlan0 (5)
> Fri Nov 16 13:23:01 __md_discover_router: discover link on iface  
> wlan0 (5)
> Fri Nov 16 13:23:01 ndisc_send_unspec: sendmsg: Cannot assign  
> requested address
> Fri Nov 16 13:23:05 __md_discover_router: discover link on iface  
> wlan0 (5)
> Fri Nov 16 13:23:05 md_change_default_router: add new router  
> fe80:0:0:0:214:22ff:feac:355e on interface wlan0 (5)
> Fri Nov 16 13:23:05 md_update_router_stats: add coa 2001:a:c: 
> 1:290:5bff:feb2:dd0 on interface (5)Fri Nov 16 13:23:05 mn_move: 1731
> Fri Nov 16 13:23:05 mn_move: in foreign net
> Fri Nov 16 13:23:05 mn_block_rule_add: blackhole is already set.
> Fri Nov 16 13:23:05 mn_send_home_bu: 783
> Fri Nov 16 13:23:05 mn_get_home_lifetime: CoA lifetime 2591999 s,  
> HoA lifetime 2591804 s, BU lifetime 1800 s
> Fri Nov 16 13:23:05 mn_send_home_bu: Moved to foreign network
> Fri Nov 16 13:23:05 mn_send_home_bu: Bule for HA exists. Updating it.
> Fri Nov 16 13:23:05 mh_send: sending MH type 5
> from 2001:a:b:0:0:0:0:1
> to 2001:a:b:0:0:0:0:1000
> Fri Nov 16 13:23:05 mh_send: local CoA 2001:a:c:1:290:5bff:feb2:dd0
> Fri Nov 16 13:23:05 bul_update_timer: Updating timer
> == BUL_ENTRY ==
> Home address    2001:a:b:0:0:0:0:1
> Care-of address 2001:a:c:1:290:5bff:feb2:dd0
> CN address      2001:a:b:0:0:0:0:1000
>  lifetime = 1800,  delay = 1000
>  flags: IP6_MH_BU_HOME IP6_MH_BU_ACK
> Fri Nov 16 13:23:05 tunnel_mod: modifying tunnel 6 end points with  
> from 2001:a:c:1:290:5bff:feb2:dd0 to 2001:a:b:0:0:0:0:1000
> Fri Nov 16 13:23:05 mn_recv_ba: 1029
> Fri Nov 16 13:23:05 mn_recv_ba: Got BA from 2001:a:b:0:0:0:0:1000 to  
> home address 2001:a:b:0:0:0:0:1 with coa 2001:a:c: 
> 1:290:5bff:feb2:dd0 and status 141
> Fri Nov 16 13:23:05 mn_recv_ba: Dumping corresponding BULE
> == BUL_ENTRY ==
> Home address    2001:a:b:0:0:0:0:1
> Care-of address 2001:a:c:1:290:5bff:feb2:dd0
> CN address      2001:a:b:0:0:0:0:1000
>  lifetime = 1800,  delay = 1000
>  flags: IP6_MH_BU_HOME IP6_MH_BU_ACK
> mip6d[3231]: Unable to register with HA, deleting entry
> Fri Nov 16 13:23:05 bule_invalidate: HA unable to handle binding,  
> changing BUL entry to NON_MIP_CN_ENTRY
> Fri Nov 16 13:23:05 mn_pol_ext_cleanup:
> Fri Nov 16 13:23:05 mpd_cancel_mps: canceling MPS
> Fri Nov 16 13:23:05 bul_delete: Deleting bule
> == BUL_ENTRY ==
> Home address    2001:a:b:0:0:0:0:1
> Care-of address 2001:a:b:0:0:0:0:1
> CN address      2001:a:b:0:0:0:0:1000
>  lifetime = 1800,  delay = 1000
>  flags: IP6_MH_BU_HOME IP6_MH_BU_ACK
> Fri Nov 16 13:23:05 bul_add: Adding bule
> == NON_MIP_CN_ENTRY ==
> Home address    2001:a:b:0:0:0:0:1
> Care-of address 0:0:0:0:0:0:0:0
> CN address      2001:a:b:0:0:0:0:1000
>  lifetime = 420,  delay = 420000
>  flags: IP6_MH_BU_HOME IP6_MH_BU_ACK
>
>
> HA output:
> ^[OFmip6d[2886]: MIPL Mobile IPv6 for Linux v2.0.2-umip-0.4 started  
> (Home Agent)
> Tue Oct 30 17:46:55 main: MIPL Mobile IPv6 for Linux started in  
> debug mode, not detaching from terminal
> Tue Oct 30 17:46:55 conf_show: config_file = /usr/local/etc/mip6d.conf
> Tue Oct 30 17:46:55 conf_show: vt_hostname = localhost
> Tue Oct 30 17:46:55 conf_show: vt_service = 7777
> Tue Oct 30 17:46:55 conf_show: mip6_entity = 2
> Tue Oct 30 17:46:55 conf_show: debug_level = 10
> Tue Oct 30 17:46:55 conf_show: debug_log_file = stderr
> Tue Oct 30 17:46:55 conf_show: PolicyModulePath = [internal]
> Tue Oct 30 17:46:55 conf_show: DefaultBindingAclPolicy = 129
> Tue Oct 30 17:46:55 conf_show: NonVolatileBindingCache = disabled
> Tue Oct 30 17:46:55 conf_show: KeyMngMobCapability = disabled
> Tue Oct 30 17:46:55 conf_show: UseMnHaIPsec = disabled
> Tue Oct 30 17:46:55 conf_show: MnMaxHaBindingLife = 262140
> Tue Oct 30 17:46:55 conf_show: MnMaxCnBindingLife = 420
> Tue Oct 30 17:46:55 conf_show: MnRouterProbes = 0
> Tue Oct 30 17:46:55 conf_show: MnRouterProbeTimeout = 0.000000
> Tue Oct 30 17:46:55 conf_show: InitialBindackTimeoutFirstReg =  
> 1.500000
> Tue Oct 30 17:46:55 conf_show: InitialBindackTimeoutReReg = 1.000000
> Tue Oct 30 17:46:55 conf_show: UseCnBuAck = disabled
> Tue Oct 30 17:46:55 conf_show: DoRouteOptimizationMN = enabled
> Tue Oct 30 17:46:55 conf_show: MnUseAllInterfaces = disabled
> Tue Oct 30 17:46:55 conf_show: MnDiscardHaParamProb = disabled
> Tue Oct 30 17:46:55 conf_show: SendMobPfxSols = enabled
> Tue Oct 30 17:46:55 conf_show: OptimisticHandoff = disabled
> Tue Oct 30 17:46:55 conf_show: SendMobPfxAdvs = enabled
> Tue Oct 30 17:46:55 conf_show: SendUnsolMobPfxAdvs = enabled
> Tue Oct 30 17:46:55 conf_show: MaxMobPfxAdvInterval = 86400
> Tue Oct 30 17:46:55 conf_show: MinMobPfxAdvInterval = 600
> Tue Oct 30 17:46:55 conf_show: HaMaxBindingLife = 262140
> Tue Oct 30 17:46:55 conf_show: DoRouteOptimizationCN = enabled
> Tue Oct 30 17:46:55 xfrm_cn_init: Adding policies and states for CN
> Tue Oct 30 17:46:55 xfrm_ha_init: Adding policies and states for HA
> Tue Oct 30 17:46:55 ha_if_addr_setup: Joined anycast group 2001:a:b: 
> 0:fdff:ffff:ffff:fffe on iface 4
> Tue Oct 30 17:50:48 mh_bu_parse: Binding Update Received
> Tue Oct 30 17:50:49 ndisc_do_dad: Dad success
> Tue Oct 30 17:50:49 __tunnel_add: created tunnel ip6tnl1 (5) from  
> 2001:a:b:0:0:0:0:1000 to 2001:a:c:1:250:4ff:fe6f:ba14 user count 1
> Tue Oct 30 17:50:49 mh_send_ba: status 0
> Tue Oct 30 17:50:49 mh_send: sending MH type 6
> from 2001:a:b:0:0:0:0:1000
> to 2001:a:b:0:0:0:0:1
> Tue Oct 30 17:50:49 mh_send: remote CoA 2001:a:c:1:250:4ff:fe6f:ba14
> Tue Oct 30 17:51:45 mh_bu_parse: Binding Update Received
> Tue Oct 30 17:51:45 tunnel_mod: modifying tunnel 5 end points with  
> from 2001:a:b:0:0:0:0:1000 to 2001:a:c:1:250:4ff:fe6f:ba14Tue Oct 30  
> 17:51:45 tunnel_mod: ext_tunnel_ops failed
> Tue Oct 30 17:51:45 __tunnel_del: tunnel ip6tnl1 (5) from 2001:a:b: 
> 0:0:0:0:1000 to 2001:a:c:1:250:4ff:fe6f:ba14 user count decreased to 0
> Tue Oct 30 17:51:45 __tunnel_del: tunnel deleted
> Tue Oct 30 17:51:45 mh_send_ba: status 141
> Tue Oct 30 17:51:45 mh_send: sending MH type 6
> from 2001:a:b:0:0:0:0:1000
> to 2001:a:b:0:0:0:0:1
> Tue Oct 30 17:51:45 mh_send: remote CoA 2001:a:c:1:250:4ff:fe6f:ba14
> Tue Oct 30 17:58:47 mh_bu_parse: Binding Update Received
> Tue Oct 30 17:58:48 ndisc_do_dad: Dad success
> Tue Oct 30 17:58:48 __tunnel_add: created tunnel ip6tnl1 (6) from  
> 2001:a:b:0:0:0:0:1000 to 2001:a:c:1:250:4ff:fe6f:ba14 user count 1
> Tue Oct 30 17:58:48 mh_send_ba: status 0
> Tue Oct 30 17:58:48 mh_send: sending MH type 6
> from 2001:a:b:0:0:0:0:1000
> to 2001:a:b:0:0:0:0:1
> Tue Oct 30 17:58:48 mh_send: remote CoA 2001:a:c:1:250:4ff:fe6f:ba14
> Tue Oct 30 17:59:44 mh_bu_parse: Binding Update Received
> Tue Oct 30 17:59:44 tunnel_mod: modifying tunnel 6 end points with  
> from 2001:a:b:0:0:0:0:1000 to 2001:a:c:1:250:4ff:fe6f:ba14Tue Oct 30  
> 17:59:44 tunnel_mod: ext_tunnel_ops failed
> Tue Oct 30 17:59:44 __tunnel_del: tunnel ip6tnl1 (6) from 2001:a:b: 
> 0:0:0:0:1000 to 2001:a:c:1:250:4ff:fe6f:ba14 user count decreased to 0
> Tue Oct 30 17:59:44 __tunnel_del: tunnel deleted
> Tue Oct 30 17:59:44 mh_send_ba: status 141
> Tue Oct 30 17:59:44 mh_send: sending MH type 6
> from 2001:a:b:0:0:0:0:1000
> to 2001:a:b:0:0:0:0:1
> Tue Oct 30 17:59:44 mh_send: remote CoA 2001:a:c:1:250:4ff:fe6f:ba14
> Tue Oct 30 18:06:45 mh_bu_parse: Binding Update Received
> Tue Oct 30 18:06:46 ndisc_do_dad: Dad success
> Tue Oct 30 18:06:46 __tunnel_add: created tunnel ip6tnl1 (7) from  
> 2001:a:b:0:0:0:0:1000 to 2001:a:c:1:250:4ff:fe6f:ba14 user count 1
> Tue Oct 30 18:06:46 mh_send_ba: status 0
> Tue Oct 30 18:06:46 mh_send: sending MH type 6
> from 2001:a:b:0:0:0:0:1000
> to 2001:a:b:0:0:0:0:1
> Tue Oct 30 18:06:46 mh_send: remote CoA 2001:a:c:1:250:4ff:fe6f:ba14
> Tue Oct 30 18:07:42 mh_bu_parse: Binding Update Received
> Tue Oct 30 18:07:42 tunnel_mod: modifying tunnel 7 end points with  
> from 2001:a:b:0:0:0:0:1000 to 2001:a:c:1:250:4ff:fe6f:ba14Tue Oct 30  
> 18:07:42 tunnel_mod: ext_tunnel_ops failed
> Tue Oct 30 18:07:42 __tunnel_del: tunnel ip6tnl1 (7) from 2001:a:b: 
> 0:0:0:0:1000 to 2001:a:c:1:250:4ff:fe6f:ba14 user count decreased to 0
> Tue Oct 30 18:07:42 __tunnel_del: tunnel deleted
> Tue Oct 30 18:07:42 mh_send_ba: status 141
> Tue Oct 30 18:07:42 mh_send: sending MH type 6
> from 2001:a:b:0:0:0:0:1000
> to 2001:a:b:0:0:0:0:1
> Tue Oct 30 18:07:42 mh_send: remote CoA 2001:a:c:1:250:4ff:fe6f:ba14
>
>
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