[ovs-discuss] icmp packet

[Ben Pfaff]

On Mon, Mar 23, 2015 at 03:54:48AM +0000, Lilin (pineorange, IT) wrote:
> Recently I had a problem when I tried to set NXM_OF_ICMP_TYPE and NXM_OF_ICMP_CODE items in ip packet by adding flow-entries on ovs bridge. As Follows:
> 
> root at it_207:~# ovs-ofctl add-flow br-int -O OpenFlow10 "table=0,priority=44,icmp,ip_dst=192.168.1.16, actions=move:NXM_OF_ETH_SRC[]->NXM_OF_ETH_DST[],mod_dl_src:fa:16:3e:6b:1e:60, load:0x08->NXM_OF_ICMP_TYPE[],load:0x00->NXM_OF_ICMP_CODE[], move:NXM_OF_IP_SRC[]->NXM_OF_IP_DST[], load:0xc0a80110->NXM_OF_IP_SRC[],IN_PORT"
> 2015-03-19T11:01:22Z|00001|meta_flow|WARN|destination field icmp_type is not writable
> ovs-ofctl: actions are invalid with specified match (OFPBAC_BAD_SET_ARGUMENT)
> 
> 
> My OVS version is 2.3.90:
> 
> root at it_207:~# ovs-vsctl --version
> ovs-vsctl (Open vSwitch) 2.3.90
> Compiled Mar  5 2015 10:31:02
> DB Schema 7.7.0
> 
> 
> I want to know that, does OVS support modifing TYPE and CODE items in icmp packet? If not, is there any other methods that I can achieve my destination?

OVS doesn't yet support modifying the type or code in ICMP.

You could do this with an OpenFlow controller.