perfSONAR User Q&A and Other Discussion

[Jason Zurawski <>]

Hi Chris;

I see that you are using a link local v6 address (fe80::/64) in your
test, that may be messing with things.  For example, here is one of our
hosts with IPv4 and IPv6 (global and link) addresses:

> [rootjz@anl-pt1
>  ~]# ifconfig eth2.915
> eth2.915  Link encap:Ethernet  HWaddr 90:E2:BA:98:7E:00  
>           inet6 addr: 2001:400:2201:1150::3/127 Scope:Global
>           inet6 addr: fe80::92e2:baff:fe98:7e00/64 Scope:Link
>           UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
>           RX packets:15439924 errors:0 dropped:0 overruns:0 frame:0
>           TX packets:7557 errors:0 dropped:0 overruns:0 carrier:0
>           collisions:0 txqueuelen:0
>           RX bytes:343959399157 (320.3 GiB)  TX bytes:619730 (605.2 KiB)

The globally routed one works fine (e.g. I am testing to 'myself'):

> [rootjz@anl-pt1
>  ~]# owping 2001:400:2201:1150::3
> Approximately 13.1 seconds until results available
>
> --- owping statistics from [anl-pt1-v6.es.net]:9958 to
> [2001:400:2201:1150::3]:9194 ---
> SID:    00000003dacb9d0f6e1b5d24b2270457
> first:    2016-04-27T13:18:24.538
> last:    2016-04-27T13:18:33.386
> 100 sent, 0 lost (0.000%), 0 duplicates
> one-way delay min/median/max = 0.00811/0.1/94.2 ms, (err=0.144 ms)
> one-way jitter = 0 ms (P95-P50)
> TTL not reported
> no reordering
>
>
> --- owping statistics from [2001:400:2201:1150::3]:9877 to
> [anl-pt1-v6.es.net]:9141 ---
> SID:    00000003dacb9d0f71666b3faba2d5ba
> first:    2016-04-27T13:18:24.531
> last:    2016-04-27T13:18:34.753
> 100 sent, 0 lost (0.000%), 0 duplicates
> one-way delay min/median/max = 0.00668/0.1/0.0458 ms, (err=0.144 ms)
> one-way jitter = 0 ms (P95-P50)
> TTL not reported
> no reordering

Testing to link local (still on 'myself') does not:

> [rootjz@anl-pt1
>  ~]# owping fe80::92e2:baff:fe98:7e00
> owping: FILE=owping.c, LINE=1603, Unable to open control connection to
> fe80::92e2:baff:fe98:7e00.

My guess is that OWAMP probably doesn't like trying to test on link
local - do you have another host that is IPv6 connected you can test
against?

Thanks;

-jason

Chris wrote:
> no firewall and v6 ping works...
>
> chris@cdkPI31:~$
>  ping6 -I wlan0 fe80::ba27:ebff:fe10:5411
> PING fe80::ba27:ebff:fe10:5411(fe80::ba27:ebff:fe10:5411) from
> fe80::ba27:ebff:fe91:336c wlan0: 56 data bytes
> 64 bytes from fe80::ba27:ebff:fe10:5411: icmp_seq=1 ttl=64 time=6.51 ms
> 64 bytes from fe80::ba27:ebff:fe10:5411: icmp_seq=2 ttl=64 time=14.5 ms
> 64 bytes from fe80::ba27:ebff:fe10:5411: icmp_seq=3 ttl=64 time=5.15 ms
> 64 bytes from fe80::ba27:ebff:fe10:5411: icmp_seq=4 ttl=64 time=37.1 ms
> 64 bytes from fe80::ba27:ebff:fe10:5411: icmp_seq=5 ttl=64 time=46.4 ms
> 64 bytes from fe80::ba27:ebff:fe10:5411: icmp_seq=6 ttl=64 time=15.5 ms
> 64 bytes from fe80::ba27:ebff:fe10:5411: icmp_seq=7 ttl=64 time=12.8 ms
>
> --- fe80::ba27:ebff:fe10:5411 ping statistics ---
> 7 packets transmitted, 7 received, 0% packet loss, time 6009ms
> rtt min/avg/max/mdev = 5.157/19.750/46.449/14.612 ms
>
> chris@cdkPI31:~$
>  owping fe80::ba27:ebff:fe10:5411
> owping: FILE=owping.c, LINE=1565, Unable to open control connection to
> fe80::ba27:ebff:fe10:5411.
> chris@cdkPI31:~$
>