Question regarding IPv6 router advertisment

[Gsiaw]

is it possible to configure an Ipv6 interface to advertise  its prefix WITHOUT sending a default route along with it?

Thanks

[Nagendra Kumar Nainar]

Hi George,

I beleive it should be done on client side. RA message doesnt carry any information about if a default route should or should not be installed.  On Cisco routers, while enabling ipv6 autoconfig, we can mention if default route should be installed using "ipv6 address autoconfig default".

I hope similar option should be available for other clients as well.

HTH,

Nagendra

[Ole Troan · Accepted solution]

You can achieve that by setting the Router Lifetime in the RA to 0.

The interface command for that is: "ipv6 nd ra lifetime 0"

There is no direct option for the default route in the Router Advertisement message. A host uses all the routers sending Router Advertisements as candidates for its default router list. Routers that sets the lifetime to zero are not considered.

Best regards,

Ole