Re: NVGRE for Linux

On Mon, Jun 10, 2013 at 7:46 PM, Stephen Hemminger
[off-list ref] wrote:

On Mon, 10 Jun 2013 08:21:49 -0700
Daniel Baluta [off-list ref] wrote:

quoted

Hi,

Is there anyone working on implementing NVGRE [1] in Linux kernel?

A significant part of the code can be borrowed from VXLAN [2] (netlink
ops, fdb ops),
while another important part (packet reception/transmission) is based
on GRE tunneling code [3].

Is this approach correct? Any suggestions are welcomed.

thanks,
Daniel.

[1] http://datatracker.ietf.org/doc/draft-sridharan-virtualization-nvgre/
[2] drivers/net/vxlan.c
[3] net/ipv4/ip_gre.c

Packet transmission is not a problem the existing GRE provides more the necessary decode/encode.
The problem problem is that you would need a management entity. Most of the interesting bits
for connecting with real world clouds like Azure remain unspecified in RFC.

That's right. The RFC defers a lot of important details for the next
version (e.g 4.4 Address/Policy Management ).
For the moment, I will try to experiment with statically defined fdbs.

Thanks!