[j-nsp] EX4200 Virtual Chassis Uplink Requirements - Extended VCT / VCCP

[Joel jaeggli]

On 6/24/12 09:20 , Sascha Luck wrote:
> James,
> 
> On Sun, Jun 24, 2012 at 08:43:22PM +1000, James Jimenez wrote:
>> I am curious with a EX4200 as to the requirements of the uplink ports
>> when
>> attempting to use VCT / VCCP. Juniper documentation says a 1000BaseTX SFP
>> module is unable to be used however I have been told that this does in
>> fact
>> work and the documentation may not have caught up yet?
> 
> the information I have is that the extended VC links must be optical. .
> 
>> I am also curious as to the requirements of the fibre uplink ports. If we
>> are purchasing carrier services does it have to be a dark fibre link
>> or are
>> we able to use VCT over a Carrier VPLS 1G Ethernet service (LX/LH/SX)? We
>> are hoping to VCT a number of chassis over a 30km distance.

extending the control-plane of an ethernet switch over tens of
kilometers is a imho a seriously bad idea.

> AFAIK, VCCP uses non-standard Ethernet frames and there must not be any
> L2 (and up) devices in the VC link path as these devices would drop the
> VCCP frames.
> 
> rgds,
> Sascha Luck
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