On May 8, 2012, at 11:58 AM, Alex D. 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. > > Regards, > Alex
I believe this is expected behavior. When you have interfaces with different MTUs configured, you will see one of these messages for each PMTU timeout period for locally-generated IPv6 multicast traffic (in this case ff02::0005 or OSPFv3 hellos) as the new PMTU is discovered for the traffic. --Stacy _______________________________________________ juniper-nsp mailing list juniper-nsp@puck.nether.net https://puck.nether.net/mailman/listinfo/juniper-nsp
