[ovs-discuss] UFID - is flow ufid persistent ?

Darrell Ball dball at vmware.com
Wed May 17 14:38:13 UTC 2017


ufid is derived from a hash of the flow key, so the value of ufid is “consistent”


On 5/17/17, 1:33 AM, "ovs-discuss-bounces at openvswitch.org on behalf of Avi Cohen (A)" <ovs-discuss-bounces at openvswitch.org on behalf of avi.cohen at huawei.com> wrote:

    TWIMC - Solved - the answer is yes.
    Just add flow in open-flow and make it installed in dp , then evicted , then reinstalled  - the ufid is the same.
    
    > -----Original Message-----
    > From: Avi Cohen (A)
    > Sent: Wednesday, 17 May, 2017 9:41 AM
    > To: 'ovs-discuss at openvswitch.org'
    > Subject: UFID - is flow ufid persistent ?
    > 
    > Hello,
    > Please can you help with this short question:
    > Is the unique  flow identifier (ufid)  persistent ?
    > i.e. flow-a is in dp-cache with  ufid = 1000, then the flow is evicted from dp-
    > cache , and after 5 minutes the same flow-a is reinstalled in dp-cache.  The
    > question - is  flow-a is being assigned  ufid = 1000 again ?
    > Best Regards
    > avi
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