On Aug 26, 2011, at 11:06 AM, Prashant Batra (prbatra) wrote:

> Hello,
>  
> RFC-4555 (IKEv2 Mobility and Multihoming Protocol (MOBIKE)) defines the 
> extension of IKEv2 to support mobile users to offer seamless services when 
> connected using IPSec
> and also the support for SCTP multi-homing in override mode.
>  
> To support a load-share model for SCTP(2 associations) or for that matter for 
> any transport protocol between 2 gateways/nodes, 2 IKEv2 tunnels are needed 
> between the same pair of gw/nodes.
> According to the current standards, the same pair of gateways has to go 
> through complete IKEv2 exchange twice(atleast 2, INIT and AUTH) to provide 
> such a service.
> So, speaking the number of IKEv2 and IPSec tunnels needed between the 
> gateways will increase with the increase in the amount of load-sharing and 
> thus time to establish these tunnels.
>  
> Going by the fact that the identity at both the gateways would be 
> authenticated in the first tunnel establishment, is there a better way to 
> achieve load-sharing?

By "better" I assume you mean "more efficient". If so, there probably is a 
"better" way to do it, but at the cost of greater complexity. I vaguely 
remember this being discussed in MOBIKE, but dismissed as too complicated for 
the value. Others here might remember more.

--Paul Hoffman

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