[j-nsp] /kernel: %KERN-6: MTU for ff02::0005 reduced to 1500

[Jonathan Lassoff]

On Tue, May 8, 2012 at 10:58 AM, Alex D. <listensammler at gmx.de> wrote:
> Hi list,
>
> i manually set IPv6 mtu to 1500 on M- an MX-Series routers running JunOS
> 10.4R8.5
> After configuration, following message appears in syslog:
> /kernel: %KERN-6: MTU for ff02::0005 reduced to 1500
>
> Is it a problem or why does the router inform about the change ?
> Whith manually set IPv4 MTU, there are no such messages in the logfile.

I would presume this is just a new codepath, and some logging was
added into the kernel.

To me, logging MTU changes on interfaces seems prudent and useful.