RE: VSS and PFC3A

BTW I noticed a stange thing last week, did a VSS configuration on a pair
of 6504-E running SXI2 IP Base non modular software. The problem was that it
did not have the OPSF, I got a "Protocol not in this image". I then changed
the software to SXI2 modular instead. Now I can do both OSPF and BGP and
still only in IP Base. I gues my customer just saved 2x 10.000 USD for the
IP service software. Anyone who knows why OSPF and BGP is in the modular
version and not in the non modular?

/Martin

-----Original Message-----
From: nobody_at_groupstudy.com [mailto:nobody_at_groupstudy.com] On Behalf Of
Lucas, David
Sent: 7. august 2009 01:06
To: Sharifi, Reza; Martin Kiefer; GS CCIE-Lab
Subject: RE: VSS and PFC3A

I know exactly what you mean. In the VSS deployments I've done I've
been lucky to have 4948s that I've used for dual active detection.

As for the 3750 cross stack support, I haven't heard that this was going
to be supported but you never know. You can always call TAC to confirm
this if you find out anything let us know!!

This is what they said in the same class at networkers about just this
issue:

"PAgP is supported in all platforms except 37xx stack configuration
where cross-stack
EtherChannel (LACP) is required to have MEC connectivity with VSS. Since
cross-stack
EtherChannel does not support PAgP, it cannot use enhanced PAgP for dual
ACTIVE detection. Two solutions to the stack-only access-layer:
Use Fast Hello or BFD as a dual ACTIVE detection method ePAgP can be
enabled either on L2 or L3 PAgP MEC members. This means one can run
ePAgP between VSS and core routers (though core routers require SXH1 or
later)"

Another thing to note, is the VSL under normal operation shouldn't carry
data traffic over it. In MEC data traffic is forwarded to the local
members of the EtherChannel bundle. If all local links fail in the
EtherChannel bundle then data traffic will traverse the VSL. Think of
normal operation as North to South, there is very little east to west
that happens. This is partly why its suggested that everything
connected to the VSS should use MEC.

David Lucas
CCIE No. 21272

-----Original Message-----
From: Sharifi, Reza [mailto:Reza.Sharifi_at_gdit.com]
Sent: Thursday, August 06, 2009 5:46 PM
To: Lucas, David; Martin Kiefer; GS CCIE-Lab
Subject: RE: VSS and PFC3A

David,

Do you know when or in what version of the IOS for the 3750s the Multi
chassis ePAGP will be implemented? Currently ePAGP is supported using a
single 3750 not MCE. So, if you have 2 3750s stacked and each 3750 has a
single 10 Gig uplink to a pair of VSS, you can not use ePAGP for dual
active detection.

Another word, if your uplinks are coming from one 3750, you are fine,
but if coming from 2 different stacked 3750s, you can not create an
EtherChannel.
Thanks,

Reza

-----Original Message-----
From: nobody_at_groupstudy.com [mailto:nobody_at_groupstudy.com] On Behalf Of
Lucas, David
Sent: Wednesday, August 05, 2009 9:53 PM
To: Martin Kiefer; GS CCIE-Lab
Subject: RE: VSS and PFC3A

Per the Breakout Session at Cisco Live (BRKRST-3035)

"Diversify VSL bundle on separate line card and port, just like any
resilient EtherChannel design. The VSL link port location also affect
the QOS configuration on the other supervisors ports.

Design 1 uses both 10G ports on supervisor which does not provide
hardware diversity as both ports are connected to single internal fabric
connection.

Design 2 offers a practical solution where the cost is more influential
then flexibility. Design 2 uses one port from Sup720-10G uplink and
other from WS-X6708 line card. This design limits unused ports on
Sup720-10G with default CoS based queuing. 12.2(33)SXI removes this
restriction

Design 3 is recommended if full flexibility of QOS configuration is
required. This option avoids using Sup 720-10G uplink ports and uses two
separate WS-X6708 line cards for VSL links but not as cost effective as
option 2 or 1"

David Lucas
CCIE No. 21272

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-----Original Message-----
From: nobody_at_groupstudy.com [mailto:nobody_at_groupstudy.com] On Behalf Of
Martin Kiefer
Sent: Wednesday, August 05, 2009 11:18 AM
To: 'GS CCIE-Lab'
Subject: RE: VSS and PFC3A

SXH does not support any service modules in a VSS setup, there you will
need
SXI and if you will be using the new 10G sfp modules you will need to
run at
least SXI2 software.

Btw I have seen some using the 6708 and 6716 10G modules for the VSS
link.
Can anyone explain why you would do that?

I always just use both of the 10G links in the supervisor, some would
say
that this is for redundancy, but where is the redundancy in this?

Best regards
Martin Kiefer

-----Original Message-----
From: nobody_at_groupstudy.com [mailto:nobody_at_groupstudy.com] On Behalf Of
Reza
Toghraee
Sent: 4. august 2009 19:12
To: 'KRATTIGER Lukas'; 'Andy Reid'; 'Ram Shummoogum'
Cc: ccielab_at_groupstudy.com
Subject: RE: VSS and PFC3A

Correct,

I have a VSS pair, with WS-X6748 with CFC.
The only problem which I faced was the IOS, which must be SXI, not SXH.
SXH
does not support FWSM modules in VSS.

Regards
Reza
CCIE R&S

-----Original Message-----
From: nobody_at_groupstudy.com [mailto:nobody_at_groupstudy.com] On Behalf Of
KRATTIGER Lukas
Sent: Tuesday, August 04, 2009 7:56 PM
To: Andy Reid; Ram Shummoogum
Cc: ccielab_at_groupstudy.com
Subject: AW: VSS and PFC3A

Hi Andy
This is not correct.
Only the cards with VSL on it need to have DFC3C and the Sup has to be
PFC3c.
All the rest has to be a 67xx-Linecard but no matter if CFC or DFC3c.
Important is, if DFC, it has to be 3c.
Cheers
-Lukas

________________________________

Von: nobody_at_groupstudy.com im Auftrag von Andy Reid
Gesendet: Di 04.08.2009 16:47
An: Ram Shummoogum
Cc: ccielab_at_groupstudy.com
Betreff: Re: VSS and PFC3A

Hi Ram,

Yes, you have to have PFC3C to run in VSS mode. In addition, all modules
equipped with DFC's must also be DFC3C.

http://www.cisco.com/en/US/partner/prod/collateral/switches/ps5718/ps933
6/pr
od_qas0900aecd806ed74b.html

regards Andy

Ram Shummoogum wrote:
> Hi:
>
> Do you think I can convert my 6500 series to VSS with a PFC3A on my
sup.
> Or do I absolutely need the PFC3C or PFC3CXL.
>
>
> Thanks
> Ram
>
>
> Blogs and organic groups at http://www.ccie.net <http://www.ccie.net/>

>
>
Received on Sun Aug 09 2009 - 09:15:09 ART