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

[Alex D.]

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.

Regards,
Alex