perfSONAR User Q&A and Other Discussion

[Tim Chown <>]

Hi,

On 27 Apr 2016, at 22:05, Jason Zurawski <> wrote:

Hi Chris;

It looks like the server is denying the test, you can try to add permissions for allowing link local into the limits file as described here:

http://software.internet2.edu/owamp/owampd.limits.man.html

Thanks;

-jason

Chris wrote:

ok, progress, at least i am seeing something on the server debug screen...

on server:
owampd[4799]: Control request to ([fd93:9bab:a8c5:1:ba27:ebff:fe10:5411]:861)
denied from ([fd93:9bab:a8c5:1:d961:3923:b42b:1bad]:40410): mode == 0

on client:
chris@cdkPI32:~$ owping fd93:9bab:a8c5:1:ba27:ebff:fe91:336c -AO -c100 -t
owping: FILE=capi.c, LINE=462, OWPControlOpen: No Common Modes
owping: FILE=owping.c, LINE=1565, Unable to open control connection to
fd93:9bab:a8c5:1:ba27:ebff:fe91:336c.

It looks like Chris is now using ULA prefixes (RFC 4193), rather than link locals. Despite the name, these are global scope addresses (so avoid the scopeID issue of link locals :).

The syntax to add permissions for the prefix should be the same though :)

Tim

Jason Zurawski wrote:

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:~$