Use the IANA-assigned port number and multicast address.

babeld.c

@@ -121,8 +121,8 @@ main(int argc, char **argv)
     seed ^= (now.tv_sec ^ now.tv_usec);
     srandom(seed);
 
-    parse_address("ff02::cca6:c0f9:e182:5373", protocol_group, NULL);
-    protocol_port = 8475;
+    parse_address("ff02:0:0:0:0:0:1:6", protocol_group, NULL);
+    protocol_port = 6697;
 
     while(1) {
         opt = getopt(argc, argv, "m:p:h:H:i:k:A:PsS:d:g:lwz:t:T:c:C:DL:I:");

babeld.man

@@ -20,11 +20,11 @@ efficiently on wired networks.
 .BI \-m " multicast-address"
 Specify the link-local multicast address to be used by the protocol.
 The default is
-.BR ff02::cca6:c0f9:e182:5373 .
+.BR ff02:0:0:0:0:0:1:6 .
 .TP
 .BI \-p " port"
 Specify the UDP port number to be used by the protocol.  The default is
-.BR 8475 .
+.BR 6697 .
 .TP
 .BI \-S " state-file"
 Set the name of the file used for preserving long-term information