Hi Sadesh, I think you can construct a ICMP request as below. I did use python interactively just as example. The ethernet packet object 'eth' must be sent by using openflow's ofp_packet_out() (method) message along with ofp_action_output() (method) action to inform switch which output port the packet must be sent from. python was started from pox installation directory.
>>> import pox.lib.packet as pkt >>> from pox.lib.addresses import IPAddr,EthAddr >>> echo = pkt.ICMP.echo(payload="0123456789") >>> icmp = pkt.icmp(type=pkt.ICMP.TYPE_ECHO_REQUEST,payload=echo) >>> ip = pkt.ipv4(srcip=IPAddr("10.0.0.1"),dstip=("10.0.0.2"),protocol=pkt.ipv4.ICMP_PROTOCOL,payload=icmp) >>> eth = pkt.ethernet(src=EthAddr("aa:bb:cc:dd:ee:fe"),dst=EthAddr("aa:bb:cc:dd:ee:ff"),type=pkt.ethernet.IP_TYPE,payload=ip) >>> print eth [aa:bb:cc:dd:ee:fe>aa:bb:cc:dd:ee:ff IP] >>> print eth.payload [IP+ICMP 10.0.0.1>10.0.0.2 (cs:00 v:4 hl:5 l:20 t:64)] >>> print eth.payload.payload [t:ECHO_REQUEST c:0 chk:0][ICMP id:25863 seq:0] I didn't test myself now but it should work :) Hope it helps -- Att Lucas Brasilino MSc Student @ Federal University of Pernambuco (UFPE) / Brazil twitter: @lucas_brasilino 2015-02-26 0:03 GMT-03:00 Sandesh Shrestha <sande...@ualberta.ca>: > Dear All, > > I want to create an ICMP request(not reply) packet in POX. How can I do > that?Especially what will be the icmp payload and source ip and mac address > so that I get reply from the mininet host. > > > Thanks, > Sandesh Shrestha > www.sandeshshrestha.blogspot.com > > >