[openib-general] IPoIB Loading and Starting

[Yaron Haviv]

> -----Original Message-----
> From: Roland Dreier [mailto:roland at topspin.com]
> Sent: Monday, September 27, 2004 5:45 PM
> To: Yaron Haviv
> Cc: Michael Krause; openib-general at openib.org
> Subject: Re: [openib-general] IPoIB Loading and Starting
> 
>     Roland> There is a small issue of how to name the interfaces to
>     Roland> solve but we should be able to work that out.
> 
>     Yaron> We can use the Linux VLAN convention of: IF_name.VLAN_tag
>     Yaron> And do for e.g. ipoib0.P_Key_value This way P_Key's can
>     Yaron> look familiar to IT people working with VLAN's And we also
>     Yaron> don't need a special place to store the P_Key value (since
>     Yaron> its part of the IF name)
> 
> Yes, that is one idea that makes sense.  Implementing it seems to
> be a little ugly though since assigning the "ipoib0" part of the name
> uniquely seems to require grunging through the list of network
> devices.  One option is to name the interface corresponding to P_Key
> table index 0 without the P_Key (just "ipoib0").
> 

I would prefer to somehow use the P_Key_value since its more persistent
than the index, an SM may choose to configure the indexes differently
after a port restart, or when removing a partition and re-inserting it 
Also indexes may not be contiguous (there can be holes due to removed
partitions) 

Basing the solution on the indexes may result in swapping the config
(IP, Mask, ..) of two interfaces 

Yaron

> By the way, the Linux 802.1q code supports several different naming
> schemes (look for "vlan_name_type" in vlan.c).
> 
> Thanks,
>   Roland