Some problems with CARP

[sibdoma]

I'm using CARP on FreeBSD 7.1-PRERELEASE.
sysctl net.inet.carp
net.inet.carp.allow: 1
net.inet.carp.preempt: 1
net.inet.carp.log: 1
net.inet.carp.arpbalance: 1
net.inet.carp.suppress_preempt: 0

And I have some common IP addresses on different vlan's.
I cant use carpdev option on FreeBSD, so, first, i have to appoint ip addresses to my vlan-interfaces.
Finally I have working version of CARP
HOST 1

ifconfig carp0
carp0: flags=49<UP,LOOPBACK,RUNNING> metric 0 mtu 1500
inet 172.17.5.1 netmask 0xffffff00
carp: MASTER vhid 1 advbase 1 advskew 0

ifconfig carp1
carp1: flags=49<UP,LOOPBACK,RUNNING> metric 0 mtu 1500
inet 172.17.5.1 netmask 0xffffff00
carp: BACKUP vhid 2 advbase 1 advskew 100


HOST 2

carp0: flags=49<UP,LOOPBACK,RUNNING> metric 0 mtu 1500
inet 172.17.5.1 netmask 0xffffff00
carp: BACKUP vhid 1 advbase 1 advskew 100

carp1: flags=49<UP,LOOPBACK,RUNNING> metric 0 mtu 1500
inet 172.17.5.1 netmask 0xffffff00
carp: MASTER vhid 2 advbase 1 advskew 0


But, dmesg of Host 1 is

arp: --------- is using my IP address 172.17.5.1 on vlan2!

similar, dmesg of host 2.

Is that normal? or i did something wrong?

[squirL]

I'm using CARP on FreeBSD 7.1-PRERELEASE.
sysctl net.inet.carp
net.inet.carp.allow: 1
net.inet.carp.preempt: 1
net.inet.carp.log: 1
net.inet.carp.arpbalance: 1
net.inet.carp.suppress_preempt: 0

And I have some common IP addresses on different vlan's.
I cant use carpdev option on FreeBSD, so, first, i have to appoint ip addresses to my vlan-interfaces.
Finally I have working version of CARP
HOST 1

ifconfig carp0
carp0: flags=49<UP,LOOPBACK,RUNNING> metric 0 mtu 1500
inet 172.17.5.1 netmask 0xffffff00
carp: MASTER vhid 1 advbase 1 advskew 0

ifconfig carp1
carp1: flags=49<UP,LOOPBACK,RUNNING> metric 0 mtu 1500
inet 172.17.5.1 netmask 0xffffff00
carp: BACKUP vhid 2 advbase 1 advskew 100


HOST 2

carp0: flags=49<UP,LOOPBACK,RUNNING> metric 0 mtu 1500
inet 172.17.5.1 netmask 0xffffff00
carp: BACKUP vhid 1 advbase 1 advskew 100

carp1: flags=49<UP,LOOPBACK,RUNNING> metric 0 mtu 1500
inet 172.17.5.1 netmask 0xffffff00
carp: BACKUP vhid 2 advbase 1 advskew 100


But, dmesg of Host 1 is

arp: --------- is using my IP address 172.17.5.1 on vlan2!

similar, dmesg of host 2.

Is that normal? or i did something wrong?
what have u set same adresses (172.17.5.1) on both carp interfaces for??
carp0 must differ from carp1

[sibdoma]

For arpbalancing.
From man

First the carp interfaces on host A are configured. The advskew of 100
on the second virtual host means that its advertisements will be sent out
slightly less frequently.

ifconfig carp0 create
ifconfig carp0 vhid 1 pass mekmitasdigoat 192.168.1.10/24
ifconfig carp1 create
ifconfig carp1 vhid 2 advskew 100 pass mekmitasdigoat 192.168.1.10/24

The configuration for host B is identical, except the advskew is on vir-
tual host 1 rather than virtual host 2.

ifconfig carp0 create
ifconfig carp0 vhid 1 advskew 100 pass mekmitasdigoat 192.168.1.10/24
ifconfig carp1 create
ifconfig carp1 vhid 2 pass mekmitasdigoat 192.168.1.10/24

Finally, the ARP balancing feature must be enabled on both hosts:

sysctl net.inet.carp.arpbalance=1

[squirL]

nice :) please, look to the man once more.

carp0: flags=49<UP,LOOPBACK,RUNNING> metric 0 mtu 1500
inet 172.17.5.1 netmask 0xffffff00
carp: BACKUP vhid 1 advbase 1 advskew 100

carp1: flags=49<UP,LOOPBACK,RUNNING> metric 0 mtu 1500
inet 172.17.5.1 netmask 0xffffff00
carp: BACKUP vhid 2 advbase 1 advskew 100
u set the same advskew on both interfaces. i think - it's incorrect. try to set one to 0 for carp1 (host B)

PS: we can discuss your problem in russian using ICQ ;)

[sibdoma]

nice :) please, look to the man once more.

u set the same advskew on both interfaces. i think - it's incorrect. try to set one to 0 for carp1 (host B)

PS: we can discuss your problem in russian using ICQ ;)
Sorry, I made a mistake when copying. Fixed...

[sibdoma]

The problem is solved. Thanks to squirL for help.
vlan interfaces and carp interfaces have to have different IP from one subnet, BUT NOT yhe same IP.
Example,

vlan2: flags=8943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST> metric 0 mtu 1500
options=3<RXCSUM,TXCSUM>
ether 00:30:48:d2:12:07
inet 172.17.5.253 netmask 0xffffff00 broadcast 172.17.5.255

and

carp0: flags=49<UP,LOOPBACK,RUNNING> metric 0 mtu 1500
inet 172.17.5.1 netmask 0xffffff00