4-byte ASN testing
Trent Lloyd
lathiat at bur.st
Sat Apr 21 14:26:34 CEST 2007
Ditto here:
bdr03.45ru.net.au#sh bgp ipv6 unicast 2001:4810:2000::/35
BGP routing table entry for 2001:4810:2000::/35, version 261235
Paths: (2 available, best #1, table Global-IPv6-Table)
Advertised to update-groups:
7
30071 6175 2497 3257 33437 23456
2001:4830:EA:B::1 (FE80::2D0:B7FF:FEB7:B1BC) from 2001:4830:EA:B::1
(65.126.230.13)
Origin IGP, localpref 100, valid, external, best
Community: 24541:30071 30071:57022
Seems to be some pretty horrid routing going on, mmm 800ms/20% loss :)
Host Loss% Snt Last Avg
1. 2402:8000:f145:1::fffe 0.0% 95 0.1 0.3
2. 2402:8000:3:145::fffe 0.0% 95 9.0 9.5
3. 2001:4830:ea:b::1 0.0% 95 244.6 244.4
4. 2001:4830:ff:11ab::1 1.1% 94 245.8 245.7
5. 2001:4830:ff:1201::1 0.0% 94 255.4 255.8
6. 2001:4830:ff:12ea::1 0.0% 94 258.1 259.2
7. 2001:4830:ff:1750::1 1.1% 94 293.8 294.6
8. 2001:4830:ff:1753::2 0.0% 94 307.2 307.1
9. 2001:4830:ff:1301::1 0.0% 94 332.9 334.1
10. 2001:440:eeee:fff4::1 1.1% 94 454.3 455.9
11. sl-bb1v6-rly-t-1003.sprintv6.net 0.0% 94 471.5 470.5
12. 2001:440:eeee:ffdc::2 18.3% 94 833.2 831.3
13. 2001:240:bb62:8000::4001 18.3% 94 825.6 832.1
14. 2001:48b0:bb00:f007::4006 21.5% 94 830.9 834.2
15. equinix6-sjc.ip.tiscali.net 17.2% 94 730.0 733.6
16. so-2-0-0.chi11.ip6.tiscali.net 17.2% 94 751.7 732.9
17. 2001:668:0:2::1:f2 22.6% 94 734.0 733.1
18. 2001:504:0:2:0:3:3437:1 15.1% 94 729.9 733.0
19. ???
Cheers,
Trent
Ibrahim wrote:
> I also got the similar result.
>
> IPv6-GW#sh bgp ipv6 unicast 2001:4810:2000::/35
> BGP routing table entry for 2001:4810:2000::/35, version 636867
> Paths: (4 available, best #4, table Global-IPv6-Table)
> Advertised to update-groups:
> 6
> 30071 6175 2497 3257 33437 23456, (received & used)
> 2001:4830:E0:18::1 (FE80::207:E9FF:FE10:65A) from
> 2001:4830:E0:18::1 (216.93.254.13)
> Origin IGP, metric 700, localpref 100, valid, external
> Community: 1970790078
> 1752 3356 3257 33437 23456, (received & used)
> 2001:7F8:2:804E::2 (FE80::D579:185B) from 2001:7F8:2:804E::2
> (213.121.24.91)
> Origin IGP, localpref 100, valid, external
> 6435 6175 2497 3257 33437 23456, (received & used)
> 2001:E00:F006::2 from 2001:E00:F006::2 (64.65.64.149)
> Origin IGP, localpref 100, valid, external
> 6175 2497 3257 33437 23456, (received & used)
> 2001:440:EEEE:FFE0::1 (FE80::2E0:B0FF:FEB4:2C20) from
> 2001:440:EEEE:FFE0::1 (144.228.240.145)
> Origin IGP, metric 20, localpref 100, valid, external, best
>
> IPv6-GW#traceroute 2001:4810:2345::6
>
> Type escape sequence to abort.
> Tracing the route to as4test.hotnic.net (2001:4810:2345::6)
>
> 1 sl-bb1v6-sea-t-25.sprintv6.net (2001:440:EEEE:FFE0::1) 216 msec
> 216 msec 220 msec
> 2 sl-bb1v6-sj-t-1004.sprintv6.net (2001:440:1239:1007::2) 240 msec
> 240 msec 240 msec
> 3 2001:440:EEEE:FFCD::2 292 msec 324 msec 340 msec
> 4 plt001ix06.IIJ.Net (2001:240:BB62:8000::4001) 332 msec 316 msec
> 320 msec
> 5 2001:48B0:BB00:F007::4006 308 msec 316 msec 312 msec
> 6 equinix6-sjc.ip.tiscali.net (2001:504:0:1::3257:1) 480 msec 512
> msec 508 msec
> 7 so-2-0-0.chi11.ip6.tiscali.net (2001:668:0:2::1:151) 492 msec 512
> msec 508 msec
> 8 so-0-0-0.was10.ip6.tiscali.net (2001:668:0:2::1:F2) 492 msec 500
> msec 504 msec
> 9 2001:504:0:2:0:3:3437:1 420 msec 412 msec 436 msec
> 10 2001:504:0:2:0:3:3437:1 !H !H !H
>
>
>
> Regards
> Ibrahim
>
>
> JAKO Andras wrote:
>> 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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