4-byte ASN testing

JAKO Andras jako.andras at eik.bme.hu
Sat Apr 21 11:51:08 CEST 2007


 Kevin,

> I am announcing 2001:4810:2000::/35 from AS6.3 to test
> 4-byte ASN functionality.

We see that prefix from AS2547:

BGP routing table entry for 2001:4810:2000::/35, version 421724
Paths: (2 available, best #1, table Global-IPv6-Table)
  Advertised to update-groups:
     1          2         
  1955 20965 3356 3257 33437 23456
    2001:738:2000:201::1 from 2001:738:2000:201::1 (195.111.97.83)
      Origin IGP, localpref 100, valid, external, best
      Community: 20965:3356


> 2001:4810:2345::6 should be pingable/traceable if
> you can see that route.

But I don't get an echo reply, and traceroute fails with "Destination 
Unreachable - Address Unreachable":

traceroute6 to 2001:4810:2345::6 (2001:4810:2345::6) from 
2001:738:2001:2001::c, 64 hops max, 12 byte packets
 1  fe80::1%fxp0  0.446 ms  0.283 ms  0.255 ms
 2  2001:738:2000:201::1  0.483 ms  0.294 ms  0.260 ms
 3  c6513.vh.hbone.hu  0.512 ms  0.497 ms  0.446 ms
 4  2001:798:1b:10aa::6  0.599 ms  0.753 ms  0.494 ms
 5  2001:798:1b:10aa::5  0.565 ms  0.740 ms  0.816 ms
 6  so-6-1-0.rt1.vie.at.geant2.net  5.295 ms  5.275 ms  5.259 ms
 7  2001:1900:5:2::5  130.396 ms  28.606 ms  28.438 ms
 8  2001:1900:5:1::1  41.905 ms  42.186 ms  41.852 ms
 9  2001:7f8:4:1::cb9:1  42.354 ms  42.256 ms 2001:7f8:4::cb9:1  63.515 ms
10  so-1-0-0.nyc33.ip6.tiscali.net  112.112 ms so-6-1-0.was10.ip6.tiscali.net  139.219 ms so-1-0-0.nyc33.ip6.tiscali.net  111.921 ms
11  so-1-0-0.was10.ip6.tiscali.net  118.602 ms so-1-0-0.was10.ip6.tiscali.net  117.406 ms so-1-0-0.was10.ip6.tiscali.net  150.292 ms
12  2001:504:0:2:0:3:3437:1  135.031 ms so-7-0-0.was10.ip6.tiscali.net  117.728 ms 2001:504:0:2:0:3:3437:1  122.983 ms
13  2001:504:0:2:0:3:3437:1  121.769 ms  127.159 ms !A  122.102 ms
14  2001:504:0:2:0:3:3437:1  136.154 ms !A  122.245 ms !A  122.058 ms !A

(Our above mentioned router is the first hop in the traceroute output.)

Don't know if this problem is related to the 4-byte ASN somehow, maybe 
not.

Andras


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