Date: Fri, 1 Jul 2005 15:01:13 -0400 From: Chris McGee <chris@xecu.net> To: freebsd-questions@freebsd.org Subject: Carp won't become master Message-ID: <7614224e37b910c674ddc809baa8135e@xecu.net>
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I have 2 machines in a test environment, the carp0 interface on the
machines will not become master. The config is as follows:
test1# ifconfig
em0: flags=8943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST> mtu 1500
options=b<RXCSUM,TXCSUM,VLAN_MTU>
inet 192.168.1.252 netmask 0xffffff00 broadcast 192.168.1.255
inet6 fe80::230:48ff:fe82:a77c%em0 prefixlen 64 scopeid 0x1
ether 00:30:48:82:a7:7c
media: Ethernet autoselect (100baseTX <full-duplex>)
status: active
em1: flags=8943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST> mtu 1500
options=b<RXCSUM,TXCSUM,VLAN_MTU>
inet 10.10.10.2 netmask 0xfffffff8 broadcast 10.10.10.7
inet6 fe80::230:48ff:fe82:a77d%em1 prefixlen 64 scopeid 0x2
ether 00:30:48:82:a7:7d
media: Ethernet autoselect (100baseTX <full-duplex>)
status: active
carp0: flags=41<UP,RUNNING> mtu 1500
inet 192.168.1.10 netmask 0xffffff00
carp: BACKUP vhid 1 advbase 1 advskew 0
carp1: flags=41<UP,RUNNING> mtu 1500
inet 10.10.10.1 netmask 0xfffffff8
carp: MASTER vhid 2 advbase 1 advskew 0
em0: flags=8943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST> mtu 1500
options=b<RXCSUM,TXCSUM,VLAN_MTU>
inet 192.168.1.253 netmask 0xffffff00 broadcast 192.168.1.255
inet6 fe80::230:48ff:fe80:21bc%em0 prefixlen 64 scopeid 0x1
ether 00:30:48:80:21:bc
media: Ethernet autoselect (100baseTX <full-duplex>)
status: active
em1: flags=8943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST> mtu 1500
options=b<RXCSUM,TXCSUM,VLAN_MTU>
inet 10.10.10.3 netmask 0xfffffff8 broadcast 10.10.10.7
inet6 fe80::230:48ff:fe80:21bd%em1 prefixlen 64 scopeid 0x2
ether 00:30:48:80:21:bd
media: Ethernet autoselect (100baseTX <full-duplex>)
status: active
carp0: flags=41<UP,RUNNING> mtu 1500
inet 192.168.1.10 netmask 0xffffff00
carp: BACKUP vhid 1 advbase 1 advskew 100
carp1: flags=41<UP,RUNNING> mtu 1500
inet 10.10.10.1 netmask 0xfffffff8
carp: BACKUP vhid 2 advbase 1 advskew 100
both test1 and test2 have these sysctl variables:
net.inet.carp.allow: 1
net.inet.carp.preempt: 1
net.inet.carp.log: 1
net.inet.carp.arpbalance: 0
The carp1 interface seems to operate properly. I can't get either box
to become master for 192.168.1.10
If I do a tcpdump on the em0 interface on the boxes, I see multicast
traffic out on em0 on test1 and I see multicast traffic from test1 on
em0 of test2. The only firewall rules are pass in all and pass out
all.
On test1(should be the master):
> netstat -ssp carp
carp:
40572 packets received (IPv4)
326 discarded for bad vhid
160550 packets sent (IPv4)
On test2(the backup);
> netstat -ssp carp
carp:
134298 packets received (IPv4)
I'm hoping someone out here can help because this is driving me crazy
and I can not even think about this for a production environment if I
can't get it working in very simple test setup.
Thanks,
Chris
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