dhcpd and IPv6

[David W. Hankins]

On Wed, Sep 30, 2009 at 09:08:16AM +0200, Robert Andersson wrote:
> Below you can see an log-file from '-d' with the final line 
>    "dhcpd: heap.c:198: isc_heap_delete: Assertion `index >= 1 && index
> <= heap->last' failed."

the first thing to do is to grab 4.1.1b2.  i don't remember anything
like this, but it's easier to work on new problems from most current
maint.

the second thing to do is to run dhcpd -6 under gdb.

  gdb --args ./server/dhcpd -d [normal other flags]

just make sure to add -d so dhcpd doesn't fork.  once in gdb, at its
prompt;

  (gdb) run

when (if) you get the heap.c assertion again, type this at the (gdb)
prompt:

  (gdb) bt

copy and paste the result into an email to dhcp-bugs at isc.org.

> Any hints on what I'm doing wrong?

the only thing in your config file i'd do differently is use a
CIDR mask on the range rather than an explicit address range.  the
current code turns an explicit range into a series of CIDRs.  it's
easier and more direct to just specify an address and mask length
than to make it calculate it out.

> Client 00:01:00:01:12:3a:5d:8d:00:0d:56:28:fd:96 reports address
> 2001:6b0:1d:1abb::f43 is already in use by another host!

this means you are getting decline messages, which is a little
unusual.

-- 
David W. Hankins	"If you don't do it right the first time,
Software Engineer		     you'll just have to do it again."
Internet Systems Consortium, Inc.		-- Jack T. Hankins
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