CARP + VLAN = kernel dump

[gnn at freebsd.org]

At Thu, 14 Dec 2006 19:05:04 -0800,
Ask Bjørn Hansen wrote:
> 
> Hi,
> 
> If I enable carp on a vlan interface in rc.conf the kernel goes  
> boom.  This is 6.2-RC from a couple of weeks ago.  (IIRC then I had  
> the same problem setting up carp on a bridge'd interface).
> 
> I'm configuring it like this:
> 
> ifconfig_vlan2="inet 10.50.0.3/24  vlan 202 vlandev sis2"
> ifconfig_carp2="vhid 3 advskew 200 pass awe4jkfha4jkfha4f 10.50.0.1"
> 
> cloned_interfaces="... carp2 ... vlan2"
> 
> However, if I do the carp2 setup "manually" after the system is  
> booted, it is working fine.
> 
> ifconfig carp2 vhid 3 advskew 200 pass hjarefhakjewfha 10.50.0.1
> 
> Any ideas?
> 
> (kernel dump below)
> 
>   - ask
> 
> 
> fault virtual address   = 0x100005c
> fault code              = supervisor read, page not present
> instruction pointer     = 0x20:0xc05ba533
> stack pointer           = 0x28:0xc7975c30
> frame pointer           = 0x28:0xc7975c90
> code segment            = base 0x0, limit 0xfffff, type 0x1b
>                          = DPL 0, pres 1, def32 1, gran 1
> processor eflags        = interrupt enabled, resume, IOPL = 0
> current process         = 13 (swi1: net)
> trap number             = 12
> panic: page fault
> Uptime: 17s
> Cannot dump. No dump device defined.
> 

A bit more information would really help.  What is needed is a
backtrace, and, if you can set up to dump core (I see by the output
that that's not done) that would be great.  A backtrace can be gotten
with 

bt [enter]

at the console after the panic.

Thanks,
George