[ovs-discuss] DHCP and OVS

MCGRATH, GIL gm2391 at att.com
Mon Aug 11 20:35:24 UTC 2014


Justin,
Sorry - I sent output of dump flows using ovs-ofctl in a prior email while PXEing.

Duh - you wanted it it from ovs-dpctl.
SORRY - will first thing in am - when I get back in office.

--Gil

Sent from my iPhone

> On Aug 11, 2014, at 2:03 PM, "MCGRATH, GIL" <gm2391 at att.com> wrote:
> 
> Justin,
> 
> While is in process of PXE booting.
> 
> # ovs-ofctl dump-flows br-em1
> NXST_FLOW reply (xid=0x4):
> cookie=0x0, duration=13577.846s, table=0, n_packets=11120087,
> n_bytes=927952497, idle_age=4, priority=0 actions=NORMAL
> 
> I ran it multiple time during the PXE boot - the same result except
> idle_age changed 0-4 and duration changed.
> 
> Gil
> 
> 
> 
> 
>> On 8/11/14, 1:49 PM, "Justin Pettit" <jpettit at nicira.com> wrote:
>> 
>> What about "ovs-dpctl dump-flows" while the reply is going through.  The
>> flow will only be there for a second or two, so you'll need to be
>> somewhat fast.
>> 
>> --Justin
>> 
>> 
>>> On August 11, 2014 at 10:29:38 AM, MCGRATH, GIL (gm2391 at att.com) wrote:
>>> Justin,
>>> 
>>> Flow is as follows:
>>> 
>>> # ovs-ofctl dump-flows br-em1
>>> NXST_FLOW reply (xid=0x4):
>>> cookie=0x0, duration=11605.818s, table=0, n_packets=9506767,
>>> n_bytes=793634428, idle_age=1, priority=0 actions=NORMAL
>>> 
>>> 
>>> 
>>>> On 8/11/14, 1:26 PM, "Justin Pettit" wrote:
>>>> 
>>>> On August 11, 2014 at 10:21:05 AM, MCGRATH, GIL (gm2391 at att.com) wrote:
>>>>>> I am running KVM on ubuntu 14.04. I am trying to PXE boot a VM.
>>> When
>>>>> I try this, using tcpdump I see the DHCP Reply message on the ³em1²
>>>>> interface. But I do not see the DHCP Reply on the ³vnet0² interface
>>>>> that KVM creates on the ³br-em1² bridge. Therefore my PXE times
>>>>> out. Anyone ever see this? If so, do we know what the issue may be.
>>>> 
>>>> What does your flow table look like from "ovs-ofctl dump-flows br-em1"?
>>>> While the replies are coming in, what do you see from "ovs-dpctl
>>>> dump-flows"?
>>>> 
>>>> --Justin
> 



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