openwrt-packages-dist/net/net-snmp/patches/100-debian-statistics.patch

--- a/agent/mibgroup/mibII/interfaces.c
+++ b/agent/mibgroup/mibII/interfaces.c
@@ -1590,6 +1590,10 @@ Interface_Scan_Init(void)
         struct ifnet   *nnew;
         char           *stats, *ifstart = line;
 
+	/* Ignore interfaces with no statistics. */
+	if (strstr(line, "No statistics available."))
+	    continue;
+
         if (line[strlen(line) - 1] == '\n')
             line[strlen(line) - 1] = '\0';
 
@@ -1622,7 +1622,7 @@ Interface_Scan_Init(void)
                                                &coll) != 5)) {
             if ((scan_line_to_use == scan_line_2_2)
                 && !strstr(line, "No statistics available"))
-                snmp_log(LOG_ERR,
+                snmp_log(LOG_DEBUG,
                          "/proc/net/dev data format error, line ==|%s|",
                          line);
             continue;