bgpd: fix remove too verbose error message

When setting up a RR EVPN setup, the below error message is displayed
for each received BGP update. It becomes flooding when many BGP updates
are received.

> 2025/03/11 14:38:24.959177 BGP: [J51AF-GQ2HJ][EC 33554468] vrf import rt lookup - evpn instance not created yet
> 2025/03/11 14:38:24.959188 BGP: [J51AF-GQ2HJ][EC 33554468] vrf import rt lookup - evpn instance not created yet

The message is just here to inform that there is no BGP backbone
defined, which is normal under a RR configuration. Setting up a RR
EVPN configuration should not lead to such message. Fix this by removing
the log messages.

Signed-off-by: Philippe Guibert <[email protected]>

Author: pguibert6WIND

bgpd/bgp_evpn.c

@@ -144,11 +144,8 @@ static struct vrf_irt_node *vrf_import_rt_new(struct ecommunity_val *rt)
 	struct vrf_irt_node *irt;
 
 	bgp_evpn = bgp_get_evpn();
-	if (!bgp_evpn) {
-		flog_err(EC_BGP_NO_DFLT,
-			 "vrf import rt new - evpn instance not created yet");
+	if (!bgp_evpn)
 		return NULL;
-	}
 
 	irt = XCALLOC(MTYPE_BGP_EVPN_VRF_IMPORT_RT,
 		      sizeof(struct vrf_irt_node));
@@ -170,11 +167,8 @@ static void vrf_import_rt_free(struct vrf_irt_node *irt)
 	struct bgp *bgp_evpn = NULL;
 
 	bgp_evpn = bgp_get_evpn();
-	if (!bgp_evpn) {
-		flog_err(EC_BGP_NO_DFLT,
-			 "vrf import rt free - evpn instance not created yet");
+	if (!bgp_evpn)
 		return;
-	}
 
 	hash_release(bgp_evpn->vrf_import_rt_hash, irt);
 	list_delete(&irt->vrfs);
@@ -197,12 +191,8 @@ static struct vrf_irt_node *lookup_vrf_import_rt(struct ecommunity_val *rt)
 	struct vrf_irt_node tmp;
 
 	bgp_evpn = bgp_get_evpn();
-	if (!bgp_evpn) {
-		flog_err(
-			EC_BGP_NO_DFLT,
-			"vrf import rt lookup - evpn instance not created yet");
+	if (!bgp_evpn)
 		return NULL;
-	}
 
 	memset(&tmp, 0, sizeof(tmp));
 	memcpy(&tmp.rt, rt, ECOMMUNITY_SIZE);