Hi Ali Ahmad. Sorry if I misunderstood your question, but I think you should configure the IP of your router as next hop and the out port by yourself. You can configure your router A to forward packets it doesn't know the destination to router B, specifying the port that connect both routers.
Assuming you are using Openflow Switches as routers, you can use the struct ofp_switch_features to obtain information about the switches in your network. Your controller sends an OFPT_FEATURES_REQUEST message and the switch responds with an OFPT_FEATURES_REPLY message, that contains several informations, as the switch MAC address, number of flow_tables, port definitions and others. I never used this, but you could take a look on it, that can help you. With this you maybe won't need ARP to discover your gateway MAC address. I would also suggest you to take a look on http://www.openflow.org/wk/index.php/OpenFlow_Tutorial#Create_Router that can help in some way. Hope it helps. Best Regards. 2011/8/4 ali ahmad <aliahmad...@hotmail.com> > Some more things which i want to know > > how to find out the mac address of the gateway router without using arp?? > > ------------------------------ > From: aliahmad...@hotmail.com > To: email@example.com > Date: Fri, 5 Aug 2011 01:26:12 +0000 > Subject: [nox-dev] next hop IP > > > Hi! > I just want to know if i have to send the packet from the gatway (router) > to another router than how will i come to know the > ip of the next hop(router) > outgoing interface(port number) > > > > > _______________________________________________ nox-dev mailing list > firstname.lastname@example.org http://noxrepo.org/mailman/listinfo/nox-dev > > _______________________________________________ > nox-dev mailing list > email@example.com > http://noxrepo.org/mailman/listinfo/nox-dev > > -- Ricardo Bennesby da Silva Ciência da Computação - UFAM LabCIA - Laboratório de Computação Inteligente e Autonoma
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