Re: nd6_setmtu0: new link MTU on iwn0 (576) is too small for IPv6 which needs 1280

[Ottavio Caruso <ottavio2006-netbsd%yahoo.com@localhost>]

On 4 December 2014 at 11:25, Robert Elz <kre%munnari.oz.au@localhost> wrote:
> Yes, you should not need to do that - something is lowering the MTU,
> my guess is still dhcpcd,

As per previous post, correct.

>  What you should really do, is look see if you can find
> any DHCP packets in the tcpdump output, try something like
>
>         tcpdump -r /tmp/dump.txt -s 1500 -vvv -xx udp port 67 or udp port 68

This is all I have from the command below:

bash-4.3#  tcpdump -s1500 -i iwn0  /tmp/dump.txt -vvv -xx udp port 67
or udp port 68

after running dhcpcd:

bash-4.3#   tcpdump -r /tmp/dump.txt
reading from file /tmp/dump.txt, link-type EN10MB (Ethernet)
10:32:09.975761 IP 0.0.0.0.bootpc > 255.255.255.255.bootps:
BOOTP/DHCP, Request from 00:21:5c:55:ee:9d (oui Unknown), length 317
10:32:09.980990 IP 192.168.1.1.bootps > 192.168.1.108.bootpc:
BOOTP/DHCP, Reply, length 548

Not sure why it mentions Ethernet while I have specified iwn0.