freebsd 8.1 crash with ECMP

[Ingo Flaschberger]

Hi,

ifconfig em0 10.11.11.175/24
ifconfig em0 alias 10.20.20.1/24
route add -net 10.20.20.0/24 10.11.11.1 -weight 2

Fatal trap 12: page fault while in kernel mode
cpuid = 0; apic id = 00
fault virtual address   = 0x98
fault code              = supervisor read data, page not present
instruction pointer     = 0x20:0xffffffff80363cd3
stack pointer           = 0x28:0xffffff803e5da550
frame pointer           = 0x28:0xffffff803e5da580
code segment            = base 0x0, limit 0xfffff, type 0x1b
                         = DPL 0, pres 1, long 1, def32 0, gran 1
processor eflags        = interrupt enabled, resume, IOPL = 0
current process         = 1767 (ping)
trap number             = 12
panic: page fault
cpuid = 0
Uptime: 3m46s
Cannot dump. Device not defined or unavailable.
Automatic reboot in 15 seconds - press a key on the console to abort
--> Press a key on the console to reboot,
--> or switch off the system now.

Kind regards,
 	ingo flaschberger