Hello, collegues!
In vlan2 I have 4 routers: rt1 (master) and rt2 (slave) grouped into VHID
50 in terms of CARP; rt3 (master) and rt4 (slave) grouped into VHID 2. Why
don't I see carp advertisements from rt1? Instead, I see carp announcements
only from rt3 (vhid2). Where am I wrong?
rt1:
-> % ifconfig carp2 | grep -v inet
carp2: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
lladdr 00:00:5e:00:01:32
description: Interlink
index 5 priority 15 llprio 3
carp: MASTER carpdev vlan2 vhid 50 advbase 1 advskew 0
groups: carp
status: master
ks1@rt1 [05:44:47] [~]
-> % sudo tcpdump -c 10 -ni carp2 proto carp
tcpdump: listening on carp2, link-type EN10MB
05:44:54.003157 CARPv2-advertise 36: vhid=2 advbase=1 advskew=0 demote=0
(DF) [tos 0x10]
05:44:55.003217 CARPv2-advertise 36: vhid=2 advbase=1 advskew=0 demote=0
(DF) [tos 0x10]
05:44:56.003236 CARPv2-advertise 36: vhid=2 advbase=1 advskew=0 demote=0
(DF) [tos 0x10]
05:44:57.003276 CARPv2-advertise 36: vhid=2 advbase=1 advskew=0 demote=0
(DF) [tos 0x10]
05:44:58.003313 CARPv2-advertise 36: vhid=2 advbase=1 advskew=0 demote=0
(DF) [tos 0x10]
05:44:59.003354 CARPv2-advertise 36: vhid=2 advbase=1 advskew=0 demote=0
(DF) [tos 0x10]
05:45:00.003398 CARPv2-advertise 36: vhid=2 advbase=1 advskew=0 demote=0
(DF) [tos 0x10]
05:45:01.003431 CARPv2-advertise 36: vhid=2 advbase=1 advskew=0 demote=0
(DF) [tos 0x10]
05:45:02.003475 CARPv2-advertise 36: vhid=2 advbase=1 advskew=0 demote=0
(DF) [tos 0x10]
05:45:03.003512 CARPv2-advertise 36: vhid=2 advbase=1 advskew=0 demote=0
(DF) [tos 0x10]
ks1@rt1 [05:45:03] [~]
-> % sysctl net.inet.carp
net.inet.carp.allow=1
net.inet.carp.preempt=1
net.inet.carp.log=2
ks1@rt1 [05:46:40] [~]
-> % uname -r
6.8
ks1@rt1 [05:57:11] [~]
-> % sudo sysctl net.inet.carp.log=7
net.inet.carp.log: 2 -> 7
ks1@rt1 [05:57:25] [~]
-> % tail -f /var/log/messages
Feb 20 05:57:57 border1 /bsd: carp2: ip_output failed: 13
Feb 20 05:57:58 border1 /bsd: carp2: ip_output failed: 13
Feb 20 05:57:59 border1 /bsd: carp2: ip_output failed: 13
Feb 20 05:58:00 border1 /bsd: carp2: ip_output failed: 13
Feb 20 05:58:01 border1 /bsd: carp2: ip_output failed: 13
...
I don't know what it means. Do I understand correctly that there can be
only one master in the multicast domain that can send carp advertisements?
Thanks.
Regards,
Den
