Does the machine need to be set up as a full Linux Router without NIST Net? I thought that NIST Net would handle most of that on its own.
When I use traceroute, I force the data to be sent from a certain IP address using the -s option. Otherwise, it establishes a trace just fine by using the network card on the same subnet. Bryan Rosander ------------------------ 1). Try your test without enabling NIST Net. If it does not work, it would be a problem with your routing not the NIST Net. 2). Your "two other machine" also have two NICs, each resides on Subnet 1 and 2.(if I understood your description right). The traffic from these machine would go directly from its own interface to the destination because it does not need a gateway - it can ARP on the interface and reach the destination. If these two machine can not ping each other, you have connection problem. Hope this helps. From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Bryan Rosander Sent: Thursday, May 25, 2006 2:07 PM To: nistnet@antd.nist.gov Subject: [nistnet] Problems Routing with NISTNet We have 3 computers, all running Red Hat Enterprise Linux 3.0. They all have 2 network cards, one with an IP address on Subnet 1 and the other IP address on Subnet 2. There is no routing between the subnets besides NIST Net We have been trying to use NIST Net to send data between two subnets in order to test some other software over a simulated WAN. However, Its not working and we arent sure why. It compiled fine and is using the real time clock as a module. We also set /proc/net/sys/ipv4/ip_forward to 1 and FORWARD_IPV4="yes" /etc/sysconfig/network for the NIST Net machine. For the other two machines, we set the default gateway to one of the IP addresses of the NIST Net machine, so that they were on different subnets. When I start up NIST Net, I try sending a traceroute from one machine to another, from one subnet to another, forcing it to go through NIST Net. It just times out. I try this with the emulator on and off. Then I try adding the IP addresses that I am trying to communicate between to the the first source and destination fields, and it still doesnt work, even if I stop and start traceroute. Adding a bandwidth parameter doesnt help either. Were really confused by this and would like to get NIST Net working. Could someone offer a suggestion? Bryan Rosander _______________________________________________ nistnet mailing list nistnet@antd.nist.gov http://www-x.antd.nist.gov/mailman/listinfo/nistnet
