Multicast storm
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hi all
I have a carp system with two 1.2.3-rc1 boxes.
I have 12 carps active and fully working.
Now I need to add a 13th carp to add a WAN3 link, I did everything like carp 12 (WAN2 link):
I setup a new vlan, set the ip and the carp interface._vlan2: flags=8943 <up,broadcast,running,promisc,simplex,multicast>metric 0 mtu 1500
ether 00:00:24:c4:fb:84
inet6 fe80::209:6bff:feb2:c498%vlan2 prefixlen 64 scopeid 0xc
inet 94.89.229.106 netmask 0xfffffff8 broadcast 94.89.229.111
media: Ethernet autoselect (100baseTX <full-duplex>)
status: active
vlan: 30 parent interface: sis0ifconfig carp13
carp13: flags=49 <up,loopback,running>metric 0 mtu 1500
inet 94.89.229.108 netmask 0xfffffff8
carp: MASTER vhid 14 advbase 1 advskew 0</up,loopback,running></full-duplex></up,broadcast,running,promisc,simplex,multicast>_The carp status works good (master and slave), but when I try to ping the router through connected to the new link I have a lot of losts ping, and from tcpdump -i vlan2 I see a lot of this lines:
_16:35:15.031893 IP host106-229-static.89-94-b.business.telecomitalia.it > all-systems.mcast.net: ICMP router advertisement lifetime 30:00 1: {host106-229-static.89-94-b.business.telecomitalia.it 2147483649}, length 16
16:35:15.031901 IP host106-229-static.89-94-b.business.telecomitalia.it > all-systems.mcast.net: ICMP router advertisement lifetime 30:00 1: {host106-229-static.89-94-b.business.telecomitalia.it 2147483649}, length 16
^C
2689 packets captured
23827 packets received by filter
20187 packets dropped by kernel(about a sec of capturing)_
deleting the carp in the backup node seems to solve.
What can I do to debug this ?
thanksGiacomo
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Please see this: http://forum.pfsense.org/index.php/topic,16345.0.html and this: .http://forum.pfsense.org/index.php/topic,16373.html I suspect you have discovered the same feature as me and several other people:
!NAT + loadbalancer + MultiWAN = Multicast storm.