rfc5837 in the wild?

Saku_Ytti1 · August 4, 2023, 10:33am

Does anyone have a traceroute path example where transit responds with
RFC5837 EO?

8enet/traceroute/blob/master/traceroute/extension.c#L101


      
          					i ? "/" : "",
          					mpls >> 12,
          					(mpls >> 9) & 0x7,
          					(mpls >> 8) & 0x1,
          					mpls & 0xff);
          		}
          
          
	    }
          	    else {	/*  common case...  */
          
          
		do_snprintf (curr, end, "%u/%u:", obj->class, obj->c_type);
          
          
		for (i = 0; i < n && curr < end; i++, ui++)
          		    do_snprintf (curr, end, "%s%08x", i ? "," : "", ntohl(*ui));
          	    }
          
          
	    buf += objlen;
          	    len -= objlen;
          	}
          
          
	if (len)  return -1;

Output should be '2/x: <hex>'

At least JNPR seems to support this:

- although support may be just QFX5100, documentation is ambiguous.
There is also a patch (
https://lore.kernel.org/all/6a7f33a5-13ca-e009-24ac-fde59fb1c080@gmail.com/T/
) for linux, but it's not included in the kernel.