If we statically configure a default route, and also advertise it for SLAAC, the kernel will try moments later to add the same route: ICMPv6: RA: ndisc_router_discovery failed to add default route Signed-off-by: Stefano Brivio <sbrivio(a)redhat.com> --- conf.c | 3 +++ passt.1 | 4 +++- 2 files changed, 6 insertions(+), 1 deletion(-) diff --git a/conf.c b/conf.c index c8a3693..08f24be 100644 --- a/conf.c +++ b/conf.c @@ -1255,6 +1255,9 @@ void conf(struct ctx *c, int argc, char **argv) usage(argv[0]); } + if (c->pasta_conf_ns) + c->no_ra = 1; + if (c->mode == MODE_PASTA && c->pasta_netns_fd == -1) pasta_start_ns(c); diff --git a/passt.1 b/passt.1 index 65b473b..1e7cf1a 100644 --- a/passt.1 +++ b/passt.1 @@ -440,7 +440,9 @@ The default path is shown with --help. .TP .BR \-\-config-net Configure networking in the namespace: set up addresses and routes as configured -or sourced from the host, and bring up the tap interface. +or sourced from the host, and bring up the tap interface. This option implies +\fB--no-ra\fR: the static configuration of the IPv6 address will not allow the +kernel to set up the default route using SLAAC. .TP .BR \-\-ns-mac-addr " " \fIaddr -- 2.34.1