[nsp] Recommended 12.0S IOS for 7xxx platforms

[Yuval Ben-Ari]

> We're currently looking at rolling out a software release on our edge 
> boxes with low latency queue support, which was added in 12.0.26S.
> 
> We've tried 12.0.28S and 12.0.26S2 in our lab, and they both 
> seem to be
> leaking memory on our 7500 and 7200VXR boxes (TAC cases open).
> 
> Does anyone have any good experiences with post 12.0.26S releases?
> 
> Is 12.0.27S2 (released a couple of days ago) worth a look?

how about trying 12.2S instead (supported on 7200/7300/7500)
been using 12.2(18)S4 on few 7206/NPE400, no problem so far.
Latest available for 7200 is S5