Re: Another WAAS question

I cited a page that has some context around it.

*2) You lose DRE when peering two WAAS Express devices. Since WAAS Express
only does DRE decode, having WAAS Express devices on both ends of the
connection means you effectively limit yourself to only TFO + LZ even if
the policy is set for TFO DRE LZ (e.g. Full optimization). This is why
WAAS Express is recommended to peer with a WAAS appliance at the head end.*

Meaning if you're using WAAS Express, the only option you have is TFO DRE
LZ. DRE won't be available without CM so you're down to TFO + LZ.

I believe the reason is CM manages the proprietary encryption of the DRE
Cache on the WAE boxes. In the WAAS bootcamp I went to, I recall losing
the CM causes issues on being able to access the DRE cache. My
notes/workbook are at the office, it would take me some digging to find it.

I would reach out to TAC to confirm this, as it's not best practice and
something I'm not familiar with. From my WAAS 5.0 Sizing Guide (Circa
2012) The 294-4G appears to be the lowest CM box you can use. I assume
that can be picked up on the cheap, otherwise the Cisco WAAS VM options
have to go even lower.

HTH,
JB

On Wed, Dec 3, 2014 at 12:48 AM, Carlos G Mendioroz <tron_at_huapi.ba.ar>
wrote:

> Not really so, not according to the note you cited:
>
> "Since WAAS Express only does DRE decode, ..."
>
>
>
> JB Poplawski @ 02/12/2014 23:45 -0300 dixit:
> > Same tech, just different hardware of where it runs. DRE Caching won't
> work without the CM.
> >
> > Sent from my iPhone
> >
> >> On Dec 2, 2014, at 6:36 PM, <dls152_at_cox.net> <dls152_at_cox.net> wrote:
> >>
> >> This mentions waas express. Is this the same as Waas wave appliance?
> >> ---- JB Poplawski <jb.poplawski_at_gmail.com> wrote:
> >>> Quick google search pulls this up.
> >>>
> >>> Lose DRE caching and reporting.
> >>>
> https://supportforums.cisco.com/discussion/11278381/waas-express-between-2-routers-cm-required
> >>>
> >>>
> >>>> On Tue, Dec 2, 2014 at 2:37 PM, Carlos G Mendioroz <tron_at_huapi.ba.ar>
> wrote:
> >>>>
> >>>> Gee, I don't know.
> >>>> The protocol would support it, because discovery and negotiation
> happens
> >>>> w/o CM (central manager) involvement.
> >>>> That would be fun, sharing the cost of the optimizationm :)
> >>>>
> >>>> JB Poplawski @ 02/12/2014 18:14 -0300 dixit:
> >>>>> AFAIK you need to have both registered to the same CM for policy
> push,
> >>>> encryption setup, etc.
> >>>>>
> >>>>> You should be able to use a VM for the CM if that's any help.
> >>>>>
> >>>>> Sent from my iPhone
> >>>>>
> >>>>>> On Dec 2, 2014, at 12:28 PM, <dls152_at_cox.net> <dls152_at_cox.net>
> wrote:
> >>>>>>
> >>>>>> Can you have a Wave applicance and a Central controller at site A
> >>>> optimize WAN trafffic to site B with its own Wave appliance and
> Central
> >>>> controller. Or do you have to have both Wave applicances use the same
> >>>> Central controller in order to optimize a cross the WAN between both
> sites?
> >>>>>>
> >>>>>>
> >>>>>> Blogs and organic groups at http://www.ccie.net
> >>>>>>
> >>>>>>
> _______________________________________________________________________
> >>>>>> Subscription information may be found at:
> >>>>>> http://www.groupstudy.com/list/CCIELab.html
> >>>>>
> >>>>>
> >>>>> Blogs and organic groups at http://www.ccie.net
> >>>>>
> >>>>>
> _______________________________________________________________________
> >>>>> Subscription information may be found at:
> >>>>> http://www.groupstudy.com/list/CCIELab.html
> >>>>
> >>>> --
> >>>> Carlos G Mendioroz <tron_at_huapi.ba.ar> LW7 EQI Argentina
> >>>>
> >>>>
> >>>> Blogs and organic groups at http://www.ccie.net
> >>>>
> >>>>
> _______________________________________________________________________
> >>>> Subscription information may be found at:
> >>>> http://www.groupstudy.com/list/CCIELab.html
> >>>
> >>>
> >>> Blogs and organic groups at http://www.ccie.net
> >>>
> >>> _______________________________________________________________________
> >>> Subscription information may be found at:
> >>> http://www.groupstudy.com/list/CCIELab.html
> >>>
> >>>
> >>>
> >>>
> >>>
> >>>
> >>>
>
> --
> Carlos G Mendioroz <tron_at_huapi.ba.ar> LW7 EQI Argentina
>
>
> Blogs and organic groups at http://www.ccie.net
>
> _______________________________________________________________________
> Subscription information may be found at:
> http://www.groupstudy.com/list/CCIELab.html

Blogs and organic groups at http://www.ccie.net
Received on Wed Dec 03 2014 - 04:47:27 ART