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[hpanvin]

Hello,

I am in California (San Jose), using a Motorola SB6120, and have recently started being able to get both IPv6 addresses (IA_NA) and prefixes (IA_PD) delegated, but I do not get any routing information.

I have done a packet trace on the upstream interface of my router (the interface to the cable modem), and the DHCPv6 transaction looks just fine, but any router advertisements obtained do not include any route information at all.  My understanding is that one should normally expect to get an RA message containing a route to ::/0 or 2000::/3.

[hpanvin]

(I am happy to provide packet captures in pcap format if it would help.)

[hpanvin · Accepted solution]

Question withdrawn - the default route is implicit per RFC 4861.  In order to make a Linux router accept an inbound RA, however, the net.ipv6.conf.<interface>.accept_ra sysctl needs to be set to *2*, indicating a "hybrid" system (a router acting as a host on a specific interface.)