On Wed, Apr 24, 2013 at 2:31 AM, Baptiste Jonglez <[email protected]> wrote: > Recent linux kernels (roughly 3.x) keep a routing cache for IPv6: each > time a host is contacted, a temporary /128 route is added. These > routes are visible using “ip -6 route show cache”. > > Asking babeld to redistribute all IPv6 routes known to the host, using > "redistribute ip ::/0", causes it to announce and de-announce these > /128 routes frequently, leading other nodes to mark them as > unreachable (thus preventing communication with the host described by > the /128 route, even though less specific routes are available). > --- > kernel_netlink.c | 4 ++++ > 1 file changed, 4 insertions(+) > > diff --git a/kernel_netlink.c b/kernel_netlink.c > index 0a85009..fc6519b 100644 > --- a/kernel_netlink.c > +++ b/kernel_netlink.c > @@ -1106,6 +1106,10 @@ filter_kernel_routes(struct nlmsghdr *nh, void *data) > if(rtm->rtm_src_len != 0) > return 0; > > + /* Ignore cached routes, advertised by some kernels (linux 3.x). */ > + if(rtm->rtm_flags & RTM_F_CLONED) > + return 0; > + > if(data) > current_route = &routes[*found]; > else > -- > 1.8.2.1
I am a little confused here, the routing cache was eliminated in linux as of version 3.6, I believe. Does this happen on 3.6 and later? (sure if the above fixes it for older kernels, goferit) > > > _______________________________________________ > Babel-users mailing list > [email protected] > http://lists.alioth.debian.org/cgi-bin/mailman/listinfo/babel-users -- Dave Täht Fixing bufferbloat with cerowrt: http://www.teklibre.com/cerowrt/subscribe.html _______________________________________________ Babel-users mailing list [email protected] http://lists.alioth.debian.org/cgi-bin/mailman/listinfo/babel-users
