Re: OT: VSS dual active detection mechanisms

Hello experts,

Regarding VSS Dual active detection, I just want to check on one thing which
I am facing in a production environment.
1)When I tend to remove the VSL links between the core switches (note that I
configured Fast hellos as dual active detection mechanism), and put them
back I see one of the switches in recovery mode and the other isn't and when
I reconnect the VSL link back it still shows as active/active..Until I
reload the switch things go back to normal.

2) Is it a best practice to configure the exclusion list on one of the
switches in order not to lose complete service?

Thanks

On Mon, Oct 25, 2010 at 4:39 PM, Poplawski, James <
jpoplawski_at_starkinvestments.com> wrote:

> It's a Layer 3 Port Channel, STP not required.
>
> interface TenGigabitEthernet1/5/4
> description VSS Link
> no switchport
> no ip address
> mls qos trust cos
> channel-group 10 mode on
> end
>
> Nice little article on VSS.
>
> http://www.cisco.com/en/US/products/ps9336/products_tech_note09186a0080a7c74c.shtml
>
> HTH,
> JB
>
> -----Original Message-----
> From: nobody_at_groupstudy.com [mailto:nobody_at_groupstudy.com] On Behalf Of
> koen_at_koenzeilstra.com
> Sent: Monday, October 25, 2010 2:45 AM
> To: 'ccielab_at_groupstudy.com'
> Subject: Re: OT: VSS dual active detection mechanisms
>
> Thanks for the replies.
>
> Do you still use STP as a precaution measure in case VSS fails or do you
> completely trust VSS and have you removed all STP config?
>
>
>
>
> On Thu, 21 Oct 2010, Poplawski, James wrote:
>
> > I know you can use Gig Int, I have been for over a year. :)
> >
> > One other recommendation, or best practice. Spread your 10G Port channel
> across two different line cards. IE if you have another 10G blade use one
> 10G from one blade and another 10G port from another blade to be a part of
> the port channel bundle.
> >
> > I only have the two teng's that came with my sups, so I'm not running
> "best practice". Uncle John (Chambers) is slightly disappointed with me.
> >
> > -JB
> >
> > ----- Original Message -----
> > From: Ryan West [mailto:rwest_at_zyedge.com]
> > Sent: Thursday, October 21, 2010 10:16 AM
> > To: Poplawski, James; 'Thomas Perrier' <thomas_at_perrier.name>; Koen
> Zeilstra <koen_at_koenzeilstra.com>
> > Cc: ccielab_at_groupstudy.com <ccielab_at_groupstudy.com>
> > Subject: RE: OT: VSS dual active detection mechanisms
> >
> > James,
> >
> > We're doing the same:
> >
> > show switch virtual dual-active fast-hello
> > Fast-hello dual-active detection enabled: Yes
> >
> > Fast-hello dual-active interfaces:
> > Port Local State Peer Port Remote State
> > ---------------------------------------------------
> > Gi1/1/48 Link up Gi2/1/48 Link up
> >
> > One thing to remember though, fast hellos are only supported if you're
> running SXI. I tried the ePaGP route to a stack of 3750G's running
> 12.2(55)SE, no luck.
> >
> > -ryan
> >
> > -----Original Message-----
> > From: nobody_at_groupstudy.com [mailto:nobody_at_groupstudy.com] On Behalf Of
> Poplawski, James
> > Sent: Thursday, October 21, 2010 11:08 AM
> > To: 'Thomas Perrier'; Koen Zeilstra
> > Cc: ccielab_at_groupstudy.com
> > Subject: RE: OT: VSS dual active detection mechanisms
> >
> > Am I missing something???
> >
> > Core-01#show switch virt dual-active fast-hello Fast-hello dual-active
> detection enabled: Yes
> >
> > Fast-hello dual-active interfaces:
> > Port Local State Peer Port Remote State
> > ---------------------------------------------------
> > Gi1/1/48 Link up Gi2/1/48 Link up
> >
> > Core-01#
> >
> > I think you can spare 1 Gig port per chassis (2 total). I can't even
> imagine the fun experienced with two active Core Switches. Sounds like an
> RGE to me.
> > JB
> >
> >
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