Steve:

Thanks for the help.

well i find the problem: on the juniper routers, the configuration missed the 
statement of "prefix fec0::...." under the clause of "router-advertisement". 
Once i set that right, it works as it should be.

best


--- On Thu, 2/12/09, Steve Bertrand <st...@ibctech.ca> wrote:

> From: Steve Bertrand <st...@ibctech.ca>
> Subject: Re: ipv6 and freebsd
> To: ipfr...@yahoo.com
> Cc: "freebsd general questions" <freebsd-questions@freebsd.org>
> Date: Thursday, February 12, 2009, 6:20 AM
> gahn wrote:
> > Thanks Steve:
> > 
> > the router that sending RA is juniper and the protocol
> router-advertisement has been activated:
> > 
> > g...@lab_1> show interfaces fe-0/0/3
> > ...
> > 
> >   Logical interface fe-0/0/3.170 (Index 70) (SNMP
> ifIndex 59) 
> > ...
> >       Addresses, Flags: Is-Preferred
> >         Destination: fe80::/64, Local:
> fe80::214:f600:aa2c:d403
> >       Addresses, Flags: Is-Preferred Is-Primary
> >         Destination: fec0:10:5::/64, Local:
> fec0:10:5:0:214:f600:aa2c:d403
> 
> fec0::/10 was deprecated per RFC3879. Perhaps the Juniper
> unit is
> obeying this and just not sending the prefix in the
> advertisement?
> 
> Everything else looks good, so lets test that possibility
> (as remote as
> it is). Take your tcpdump one step further:
> 
> > lab# tcpdump -n -i bge1 ip6
> > tcpdump: verbose output suppressed, use -v or -vv for
> full protocol decode
> > listening on bge1, link-type EN10MB (Ethernet),
> capture size 96 bytes
> > 17:55:44.027565 IP6 fe80::214:f600:aa2c:3c03 >
> ff02::1: ICMP6, router advertisement, length 24
> > 18:02:46.283353 IP6 fe80::214:f600:aa2c:d403 >
> ff02::1: ICMP6, router advertisement, length 24
> 
> # tcpdump -n -i bge1 -s 0 -w /path/to/file.pcap ip6
> 
> After a time of that running (there won't be any STDOUT
> output), stop
> the capture, and open the file in Wireshark. (I've
> never figured out
> how to get tcpdump to read the data portion of the packets
> from a file).
> 
> With the -s0, it will capture the headers and the data of
> each packet,
> so you should be able to tell whether the RA announcements
> do actually
> contain the prefix you are trying to get configured.
> 
> Something that I should have asked from the get-go...do you
> have any
> sort of firewall running on the box?
> 
> I'll set this up in my lab here today. Although we
> don't have any
> Juniper units, I'll see if I can recreate the problem
> with Cisco
> hardware. You may also want to test using a non-deprecated
> address
> space. The documentation address may work for instance.
> 
> Steve
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