From: Roopa Prabhu <ro...@cumulusnetworks.com>
neigh suppression can be used to suppress arp and nd flood
to bridge ports. It maps to the recently added
kernel support for bridge port flag IFLA_BRPORT_NEIGH_SUPPRESS.
Signed-off-by: Roopa Prabhu <ro...@cumulusnetworks.com>
---
bridge/link.c | 13 +++++++++++++
ip/iplink_bridge_slave.c | 8 ++++++++
man/man8/bridge.8 | 4 ++++
3 files changed, 25 insertions(+)
diff --git a/bridge/link.c b/bridge/link.c
index 93472ad..d3a211e 100644
--- a/bridge/link.c
+++ b/bridge/link.c
@@ -198,6 +198,9 @@ int print_linkinfo(const struct sockaddr_nl *who,
if (prtb[IFLA_BRPORT_MCAST_FLOOD])
print_onoff(fp, "mcast_flood",
rta_getattr_u8(prtb[IFLA_BRPORT_MCAST_FLOOD]));
+ if (prtb[IFLA_BRPORT_NEIGH_SUPPRESS])
+ print_onoff(fp, "neigh_suppress",
+
rta_getattr_u8(prtb[IFLA_BRPORT_NEIGH_SUPPRESS]));
}
} else
print_portstate(fp, rta_getattr_u8(tb[IFLA_PROTINFO]));
@@ -266,6 +269,7 @@ static int brlink_modify(int argc, char **argv)
.ifm.ifi_family = PF_BRIDGE,
};
char *d = NULL;
+ __s8 neigh_suppress = -1;
__s8 learning = -1;
__s8 learning_sync = -1;
__s8 flood = -1;
@@ -355,6 +359,11 @@ static int brlink_modify(int argc, char **argv)
flags |= BRIDGE_FLAGS_SELF;
} else if (strcmp(*argv, "master") == 0) {
flags |= BRIDGE_FLAGS_MASTER;
+ } else if (strcmp(*argv, "neigh_suppress") == 0) {
+ NEXT_ARG();
+ if (!on_off("neigh_suppress", &neigh_suppress,
+ *argv))
+ return -1;
} else {
usage();
}
@@ -407,6 +416,10 @@ static int brlink_modify(int argc, char **argv)
if (state >= 0)
addattr8(&req.n, sizeof(req), IFLA_BRPORT_STATE, state);
+ if (neigh_suppress != -1)
+ addattr8(&req.n, sizeof(req), IFLA_BRPORT_NEIGH_SUPPRESS,
+ neigh_suppress);
+
addattr_nest_end(&req.n, nest);
/* IFLA_AF_SPEC nested attribute. Contains IFLA_BRIDGE_FLAGS that
diff --git a/ip/iplink_bridge_slave.c b/ip/iplink_bridge_slave.c
index 80272b0..fdf8e89 100644
--- a/ip/iplink_bridge_slave.c
+++ b/ip/iplink_bridge_slave.c
@@ -238,6 +238,10 @@ static void bridge_slave_print_opt(struct link_util *lu,
FILE *f,
if (tb[IFLA_BRPORT_MCAST_FLOOD])
_print_onoff(f, "mcast_flood", "mcast_flood",
rta_getattr_u8(tb[IFLA_BRPORT_MCAST_FLOOD]));
+
+ if (tb[IFLA_BRPORT_NEIGH_SUPPRESS])
+ _print_onoff(f, "neigh_suppress", "neigh_suppress",
+ rta_getattr_u8(tb[IFLA_BRPORT_NEIGH_SUPPRESS]));
}
static void bridge_slave_parse_on_off(char *arg_name, char *arg_val,
@@ -328,6 +332,10 @@ static int bridge_slave_parse_opt(struct link_util *lu,
int argc, char **argv,
NEXT_ARG();
bridge_slave_parse_on_off("mcast_fast_leave", *argv, n,
IFLA_BRPORT_FAST_LEAVE);
+ } else if (matches(*argv, "neigh_suppress") == 0) {
+ NEXT_ARG();
+ bridge_slave_parse_on_off("neigh_suppress", *argv, n,
+ IFLA_BRPORT_NEIGH_SUPPRESS);
} else if (matches(*argv, "help") == 0) {
explain();
return -1;
diff --git a/man/man8/bridge.8 b/man/man8/bridge.8
index 9c5f855..fdba0fe 100644
--- a/man/man8/bridge.8
+++ b/man/man8/bridge.8
@@ -323,6 +323,10 @@ switch.
Controls whether a given port will be flooded with multicast traffic for which
there is no MDB entry. By default this flag is on.
.TP
+.BR "neigh_suppress on " or " neigh_suppress off "
+Controls whether neigh discovery (arp and nd) proxy and suppression is enabled
on the port. By default this flag is off.
+
+.TP
.BI self
link setting is configured on specified physical device
--
2.1.4
