Hi, Yes. Arp fields can be modified. You can use set_field or load action as shown below.
set_field:10.10.10.10->arp_spa or load:0xa0a0a0a->NXM_OF_ARP_SPA[] set_field for arp_spa seem to be internally considered same as NXM_OF_ARP_SPA. Even if set_field of arp_spa is used while adding the flow, dump flow shows NXM_OF_ARP_SPA. Regards, Venu From: ovs-discuss-boun...@openvswitch.org [mailto:ovs-discuss-boun...@openvswitch.org] On Behalf Of rahul b Sent: 24 May 2017 13:23 To: ovs-discuss@openvswitch.org Subject: [ovs-discuss] Nat functionality using Openflow, - Flow not allowed Hi i am trying to emulate nat functionality with a flow like this. ovs-ofctl add-flow s1 -Oopenflow13 priority=100,dl_type=0x806,in_port=1,action=mod_nw_src=10.10.10.3,output:2 this results in an error ovs-ofctl: none of the usable flow formate (OpenFlow10,NXM) is among the allowed flow formats (OXM-OpenFlow13) have also tried mod_arp_spa dl_type=0x806 is for arp packets However the same rule works if dl_type=0x800 , but it is not what i would want. 1. Is changing the arp packet's src, dst ip not allowed? 2. is there any other way to achieve the same functionality?probably without using nxm extensions?
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