Thanks, Bjorn for the response. The R flag is set in the NA as the sender is a router.
Dheeraj On Fri, Jun 24, 2022 at 4:08 AM Bjørn Mork <[email protected]> wrote: > Dheeraj Kandula <[email protected]> writes: > > > Thanks Povl. > > > > In the "ip neighbor" output, I see entries listed with "router". Maybe it > > is a RA Default router learnt entry. > > Nope. That's the 'router' flag in the neigbour advertisment. Lots of > systems will set this flag without sending RAs. Linux will set it if > forwarding is enable on the interface where the NA is going out. > > >From net/ipv6/addrconf.c: > > /* send unsolicited NA if enabled */ > if (send_na && > (ifp->idev->cnf.ndisc_notify || > dev_net(dev)->ipv6.devconf_all->ndisc_notify)) { > ndisc_send_na(dev, &in6addr_linklocal_allnodes, &ifp->addr, > /*router=*/ !!ifp->idev->cnf.forwarding, > /*solicited=*/ false, /*override=*/ true, > /*inc_opt=*/ true); > } > > > Bjørn > >
