Re: Another WAAS question

Indeed, even with context, the reason from there is that WAAS express
does not do DRE encoding. That is not related to having a CM or not.

Yep, the CM is the keys keeper, so if you loose CM, you better not
restart your WAEs. But that is of course if you decide to cipher the
DRE, which is optional if I remember well.

In any case, I doubt it would be a supported scenario, but this is
ccielab list after all, so would be fun to know if it works.

JB Poplawski @ 03/12/2014 09:47 -0300 dixit:
> 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
> <mailto: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
> <mailto:dls152_at_cox.net>> <dls152_at_cox.net <mailto:dls152_at_cox.net>> wrote:
> >>
> >> This mentions waas express. Is this the same as Waas wave appliance?
> >> ---- JB Poplawski <jb.poplawski_at_gmail.com
> <mailto: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 <mailto: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
> <mailto:dls152_at_cox.net>> <dls152_at_cox.net <mailto: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
> <mailto: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 <mailto: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
>
>
>
>
>
>
>
>

-- 
Carlos G Mendioroz  <tron_at_huapi.ba.ar>  LW7 EQI  Argentina
Blogs and organic groups at http://www.ccie.net