[openib-general] [PATCH 3/3] iWARP CM

[Caitlin Bestler]

-----Original Message----
> This relates back to the question on whether a port has
> more than one address. It depends on your definition of a
> port.  If the definition of a port is a netdevice then it
> is only necessary to provide one of the addresses. Existing
> techniques allow fetching the other aliases that refer to
> the same ethernet interface. There is no reason for the RDMA
> drivers to take on the complexity of reporting all possible
> IP addresses when the answer already exists in for non-RDMA.

My comment was in reference to the iwcm_port structure, which maps to a physical 
port on the device.  I can't say that I understand the use of the local_addr 
field in that structure.

- Sean
----------


No it doesn't map to the physical port, it just typically maps
to a physical port. It maps to an L2 endpoint. The ethernet
portion of the device may be doing binding.

In either case, the L2 endpoint can have multiple IP addresses,
but it always has a primary IP address.

iWARP rides on top of IP. Any solutions in place, such as
teaming of ports, will generally remain in place. The definitions
MUST allow this. As noted earlier, the RDMA layer should not 
really know the MAC address, just the IP address. Knowing the
MAC address, however, turns out to be pretty harmless. Knowing
the "true" physical port, however, is a very different matter.