[c-nsp] 7507 - Extra RSP4 and Hot swapping

[Rodney Dunn]

Most SP's I've worked with are running 12.0(27) or (28)S with
SSO on the 75xx.

I know there were some feature parity issues that drove people
to 12.2(18)S and 12.2(20)S but I wouldn't go there.

SB is going to be (from what I've heard) end of this year
or first of next year.

So depending on the feature requirements if you want HA (sso/nsf)
you should go with 12.0S. I've not seen anyone running it on 12.2(25)S
but it should work there but less field exposure.

12.3T/12.4 just gives you RPR+ as you said which doesn't keep
L2 state between processors.

Rodney

On Wed, Nov 30, 2005 at 07:54:43PM -0500, David Coulson wrote:
> Skeeve Stevens wrote:
> 
> > Basically. we want to insert the extra RSP4 into the 7507 as a warm backup.
> > is this possible?
> 
> Yep.
> 
> > The next question would be, is can this be done as a hot insert or does the
> > unit have to be brought down?
> 
> To be a real 'warm' backup you need SSO, which requires 12.2S. Chances
> are, you're probably not running this so the best you can get is RPR or
> RPR+, which requires IOS to be booted on the slave RSP... Better than
> nothing, but not ideal. I would highly recommend upgrading to 12.2(18)S
> for the additional redundency features, or wait for 12.2SB which should
> be out sometime this year (Rodney?)
> 
> David
> 
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