bgpd: skip VRF import of MAC-IP routes that belong to locally attached hosts

Local attached hosts are routed via the access ports using the neigh and
fdb/MAC dplane entries.

Signed-off-by: Anuradha Karuppiah <anuradhak@cumulusnetworks.com>

1 files changed, 33 insertions, 0 deletions

diff --git a/bgpd/bgp_evpn.c b/bgpd/bgp_evpn.c
index 890f7963e..83c5dc534 100644
--- a/bgpd/bgp_evpn.c
+++ b/bgpd/bgp_evpn.c
@@ -2852,6 +2852,29 @@ static int bgp_evpn_route_rmac_self_check(struct bgp *bgp_vrf,
 	return 0;
 }
 
+/* don't import hosts that are locally attached */
+static inline bool
+bgp_evpn_skip_vrf_import_of_local_es(const struct prefix_evpn *evp,
+				     struct bgp_path_info *pi, int install)
+{
+	if ((evp->prefix.route_type == BGP_EVPN_MAC_IP_ROUTE)
+	    && bgp_evpn_attr_is_local_es(pi->attr)) {
+		if (BGP_DEBUG(evpn_mh, EVPN_MH_RT)) {
+			char esi_buf[ESI_STR_LEN];
+			char prefix_buf[PREFIX_STRLEN];
+
+			zlog_debug(
+				"vrf %s of evpn prefix %s skipped, local es %s",
+				install ? "import" : "unimport",
+				prefix2str(evp, prefix_buf, sizeof(prefix_buf)),
+				esi_to_str(bgp_evpn_attr_get_esi(pi->attr),
+					   esi_buf, sizeof(esi_buf)));
+		}
+		return true;
+	}
+	return false;
+}
+
 /*
  * Install or uninstall mac-ip routes are appropriate for this
  * particular VRF.
@@ -2909,6 +2932,12 @@ static int install_uninstall_routes_for_vrf(struct bgp *bgp_vrf, int install)
 				      && pi->sub_type == BGP_ROUTE_NORMAL))
 					continue;
 
+				/* don't import hosts that are locally attached
+				 */
+				if (bgp_evpn_skip_vrf_import_of_local_es(
+					    evp, pi, install))
+					continue;
+
 				if (is_route_matching_for_vrf(bgp_vrf, pi)) {
 					if (bgp_evpn_route_rmac_self_check(
 								bgp_vrf, evp, pi))
@@ -3115,6 +3144,10 @@ static int install_uninstall_route_in_vrfs(struct bgp *bgp_def, afi_t afi,
 		 || is_evpn_prefix_ipaddr_v6(evp)))
 		return 0;
 
+	/* don't import hosts that are locally attached */
+	if (bgp_evpn_skip_vrf_import_of_local_es(evp, pi, install))
+		return 0;
+
 	for (ALL_LIST_ELEMENTS(vrfs, node, nnode, bgp_vrf)) {
 		int ret;