anfredette / vxlan_tool

VXLAN Tool

vxlan_tool

VXLAN Tool

This was started with a copy of https://github.com/opendaylight/sfc/blob/master/sfc-test/nsh-tools/vxlan_tool.py written by Yi Yang and Reinaldo Penno

This code was modified to

• run with Python 2.7
• swap the IP SA and DA when forwarding.
• Work for either UDP port 4790 or 6633
• Don't forward NSH frames unless service index is > 1
• Added verbose option to turn off prints when in forward mode

Options:

• -i: Interface to receive, and optionally send packets on
• -d: Mode: 'dump' or 'forward'. Default is dump.
• -v: Verbose: 'on' or 'off'. Default is 'on', and 'off' only works in 'forward' mode.

Example Use:

sudo python vxlan_tool.py -i 'eth1' -d 'forward' -v 'off'

vxlan_tool uses a raw socket to recieve and send packets. Even though vxlan_tool is handling the packets, the host will sent an ICMP unreachable message because it doesn't know that anything is listening on the UDP ports.

vxlan_tool's Issues

The vxlan tool sent back SSH traffic received

If I connected to the VM using SSH and run the tool with "-i eth0","-d forward" and "-v on", I found it Send many packets with no end. That means it send back all SSH TCP packets.

So how to solve the issue ? I used it on Ubuntu VM.