Re: Single subnet

[Steve Deering <[e-mail]>]

In response to this comment of mine...
>
> (I suppose a fancy IS would load split across the two rings, so half
> the packets would get through.  Are the transport protocols expected
> to cope with that?)

Dave responded...
 
> ... it's an issue for the forwarding engine, not the routing protocol
> or the transport entity (just like IP).

Sorry, I wasn't very clear.  If a load-splitting forwarding algorithm
(which is suggested, but not required, by the IS-IS spec) is causing half
of the packets to disappear into a black hole, a transport protocol such
as TP-4 *might* be able to compensate (depending on the particular loss
pattern), albeit with a severe degradation of performance.  Obviously,
it would be better for the routing/forwarding algorithm to avoid such
a failure mode, than to rely on the transport layer to survive it.

Steve