Re: [Keepalived-devel] multicast packets not sent by lvs director

SourceForge Headquarters 1320 Columbia Street Suite 310 San Diego, CA 92101 +1 (858) 422-6466

I have the same problem with keepalived 1.1.11
Any ideas ?

Regards,
Nicolas

Nicolas wrote:

> I have a problem with VRRP and keepalived.
> I have 2 lvs director : foo.toto.net and bar.toto.net
>
> foo.toto.net  is the master on vrrp instance called LVS_F and backup 
> for LVS_B.
> bar.toto.net  is the master on vrrp instance called LVS_B and backup 
> for LVS_F.
>
> My architecture have diffculties to be in a stable state, foo becomes 
> master on the 2 vrrp instance, but bar is present and conversely.
> I have seen when i capture multicast packets when the problem occurs, 
> one of the machine dont send multicast packets and consequently the 
> other machine becomes master on the 2 vrrp instance.
>
> I have try keepalived 1.1.10 and 1.1.7.
> Linux kernel 2.6.11.6 and 2.6.4 ( with Alexandre's /IPVS syncd patch ).*
> */Ipvsadm 1.21 and 1.24 ( with Alexandre's IPVS syncd patch ).
> I have also test with a various range of advertisement interval ...
>
> But i have always the same problem ...
>
> Here is a  sample of the dump :
> # tcpdump -i eth1 host VRRP.MCAST.NET
> 09:53:05.462913 IP foo.toto.net > VRRP.MCAST.NET: VRRPv2, 
> Advertisement, vrid 4, prio 150, authtype simple, intvl 30s, length 32
> 09:53:09.990943 IP foo.toto.net > VRRP.MCAST.NET: VRRPv2, 
> Advertisement, vrid 5, prio 200, authtype simple, intvl 30s, length 52
> 09:54:05.473720 IP foo.toto.net > VRRP.MCAST.NET: VRRPv2, 
> Advertisement, vrid 4, prio 150, authtype simple, intvl 30s, length 32
> 09:54:10.002822 IP foo.toto.net > VRRP.MCAST.NET: VRRPv2, 
> Advertisement, vrid 5, prio 200, authtype simple, intvl 30s, length 52
> 09:54:35.479147 IP foo.toto.net > VRRP.MCAST.NET: VRRPv2, 
> Advertisement, vrid 4, prio 150, authtype simple, intvl 30s, length 32
> 09:54:40.008214 IP foo.toto.net > VRRP.MCAST.NET: VRRPv2, 
> Advertisement, vrid 5, prio 200, authtype simple, intvl 30s, length 52
> 09:55:05.484542 IP foo.toto.net > VRRP.MCAST.NET: VRRPv2, 
> Advertisement, vrid 4, prio 150, authtype simple, intvl 30s, length 32
> 09:55:10.013618 IP foo.toto.net > VRRP.MCAST.NET: VRRPv2, 
> Advertisement, vrid 5, prio 200, authtype simple, intvl 30s, length 52
> 09:55:35.489940 IP foo.toto.net > VRRP.MCAST.NET: VRRPv2, 
> Advertisement, vrid 4, prio 150, authtype simple, intvl 30s, length 32
> 09:55:35.490474 IP bar.toto.net > VRRP.MCAST.NET: VRRPv2, 
> Advertisement, vrid 4, prio 200, authtype simple, intvl 30s, length 32
> 09:55:40.019022 IP foo.toto.net > VRRP.MCAST.NET: VRRPv2, 
> Advertisement, vrid 5, prio 200, authtype simple, intvl 30s, length 52
> 09:56:35.501441 IP bar.toto.net > VRRP.MCAST.NET: VRRPv2, 
> Advertisement, vrid 4, prio 200, authtype simple, intvl 30s, length 32
> 09:56:40.029819 IP foo.toto.net > VRRP.MCAST.NET: VRRPv2, 
> Advertisement, vrid 5, prio 200, authtype simple, intvl 30s, length 52
> 09:57:10.035240 IP foo.toto.net > VRRP.MCAST.NET: VRRPv2, 
> Advertisement, vrid 5, prio 200, authtype simple, intvl 30s, length 52
>
> # tail -f /var/log/everything/mesg.log | grep Keepalived_vrrp
> 09:53:35 bar Keepalived_vrrp: VRRP_Instance(LVS_B) Transition to 
> MASTER STATE
> 09:54:05 bar Keepalived_vrrp: VRRP_Instance(LVS_B) Entering MASTER STATE
> 09:54:34 bar Keepalived_vrrp: VRRP_Instance(LVS_B) Received lower prio 
> advert, forcing new election
> 09:55:04 bar Keepalived_vrrp: VRRP_Instance(LVS_B) Received lower prio 
> advert, forcing new election
> 09:55:34 bar Keepalived_vrrp: VRRP_Instance(LVS_B) Received lower prio 
> advert, forcing new election
>
> Bar try to recover his mastership on his vrrp instance but, because he 
> dont sent multicast packet he cant recovered it.
>
>
> # tail -f /var/log/messages | grep Keepalived_vrrp
> 09:53:04 foo Keepalived_vrrp: VRRP_Instance(LVS_B) Transition to 
> MASTER STATE
> 09:53:09 foo Keepalived_vrrp: VRRP_Instance(LVS_F) Transition to 
> MASTER STATE
> 09:53:34 foo Keepalived_vrrp: VRRP_Instance(LVS_B) Entering MASTER STATE
> 09:53:39 foo Keepalived_vrrp: VRRP_Instance(LVS_F) Entering MASTER STATE
> 09:55:34 foo Keepalived_vrrp: VRRP_Instance(LVS_B) Received higher 
> prio advert
> 09:55:34 foo Keepalived_vrrp: VRRP_Instance(LVS_B) Entering BACKUP STATE
> 09:58:05 foo Keepalived_vrrp: VRRP_Instance(LVS_B) Transition to 
> MASTER STATE
> 09:58:35 foo Keepalived_vrrp: VRRP_Instance(LVS_B) Entering MASTER STATE
>
>
>
> keepalived.conf on foo :
> !------------------------------------------------------!
> ! LVS_F ( foo.toto.net ) MASTER MODE !
> !------------------------------------------------------!
> vrrp_instance LVS_F {
>  state MASTER
>  interface eth1
>  virtual_router_id 5
>  priority 200
>  advert_int 30
>  authentication {
>    auth_type PASS
>    auth_pass agfzfefazf
>  }
>  virtual_ipaddress {
>          1.2.3.4
>          1.2.3.5
>          1.2.3.6
>  }
> }
>
> !------------------------------------------------------!
> ! LVS_B ( foo.toto.net ) BACKUP MODE !
> !------------------------------------------------------!
> vrrp_instance LVS_B {
>  state BACKUP
>  interface eth1
>  virtual_router_id 4
>  priority 150
>  advert_int 30
>  authentication {
>    auth_type PASS
>    auth_pass agfzfefazf
>  }
>  virtual_ipaddress {
>          1.2.3.7
>          1.2.3.8
>          1.2.3.9
>  }
> }
>
>
> keepalived.conf on bar :
> !-------------------------------------------------------!
> ! LVS_B ( bar.toto.net ) BACKUP MODE !
> !-------------------------------------------------------!
> vrrp_instance LVS_F {
>  state BACKUP
>  interface eth1
>  virtual_router_id 5
>  priority 150
>  advert_int 30
>  authentication {
>    auth_type PASS
>    auth_pass agfzfefazf
>  }
>  virtual_ipaddress {
>          1.2.3.4
>          1.2.3.5
>          1.2.3.6
>  }
> }
>
> !-------------------------------------------------------!
> ! LVS_F ( bar.toto.net ) MASTER MODE !
> !-------------------------------------------------------!
> vrrp_instance LVS_B {
>  state MASTER
>  interface eth1
>  virtual_router_id 4
>  priority 200
>  advert_int 30
>  authentication {
>    auth_type PASS
>    auth_pass agfzfefazf
>  }
>  virtual_ipaddress {
>          1.2.3.7
>          1.2.3.8
>          1.2.3.9
>  }
> }