Hi Nicolas, David and all,
r...@d0:~# dladm set-linkprop -p maxbw=0 xvm4_2
dladm: warning: cannot persistently set link property 'maxbw': object
not found
If xvm4_2 is a temporary VNIC created by Xen then it's expected. If you
don't specify -t, dladm will assume you want to set that property
persistently, and you cannot store persistent properties for
non-persistent data-links.
Ah, that sounds very reasonable. Thank you for your explanation.
There was an effort to allow the maximum bandwidth to be configured from
the Xen tools themselves [...] See http://arc.opensolaris.org/caselog/PSARC/2009/137.
I actually only need the temporary setting, but it's good ti know that the
architecture for permanently setting the maxbw parameter has already been
implemented.
I did get the expected behavior with a series of set-linkprop and
reset-linkprop commands.
So obviously corner-cases exist when the maxbw property isn't applied
strictly.
It would be interesting to know how you can get to that state. If you
can reproduce this let us know.
I can. It looks like one set/reset cycle is needed before the maxbw property is
enforced:
dom0 is snv_122
domUs are 5.10 Generic_141415-07
Etherstub:
dladm create-etherstub cli0
dladm set-linkprop -p mtu=1500 cli0
Interfaces defined for domUs (one of four interfaces each)
node0:
<interface type='bridge'>
<mac address='aa:bb:cc:dd:00:03'/>
<source bridge='cli0'/>
<script path='/usr/lib/xen/scripts/vif-vnic'/>
<target dev='vif-1.2'/>
</interface>
node1:
<interface type='bridge'>
<mac address='aa:bb:cc:dd:01:03'/>
<source bridge='cli0'/>
<script path='/usr/lib/xen/scripts/vif-vnic'/>
<target dev='vif-1.2'/>
</interface>
Dynamic interfaces created by xvm:
r...@d0:/rpool/xvm# dladm show-link | grep cli0
cli0 etherstub 1500 unknown --
xvm5_2 vnic 1500 up cli0
xvm6_2 vnic 1500 up cli0
Simple network setup in domUs:
pub0-node0:/# ifconfig xnf2 plumb 192.168.55.1/24 up
pub0-node1:/# ifconfig xnf2 plumb 192.168.55.2/24 up
Test from node0:
pub0-node0:/# ping -sn 192.168.55.2 1500
-> working.
Now run on dom0:
r...@d0:/rpool/xvm# dladm set-linkprop -t -p maxbw=0 xvm5_2
-> ping still reports echo replies
r...@d0:/rpool/xvm# dladm reset-linkprop -t -p maxbw xvm5_2
-> ping still reports echo replies
r...@d0:/rpool/xvm# dladm set-linkprop -t -p maxbw=0 xvm5_2
-> ping STOPS reporting echo replies
Nils
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