Re: Layer 2 vs. Layer 3 to TOR

[Brandon Ewing <nicotine () warningg com>]

On Thu, Nov 12, 2009 at 12:19:36PM -0800, Seth Mattinen wrote:
> I'd always wondered how you make a subnet available across racks with L3
> rack switching. It seems that you don't.
>
> ~Seth

It's possible, with prior planning.  You can have the uplinks be layer 2
trunks, with a layer 3 SVI in the trunk acting as your actual routed uplink.

Requires much planning in advance regarding what vlans are trunked where,
etc.  Allows one to do layer 3 termination at top of rack for single
servers, but offer vlans that span multiple layer 3 switches with HSRP at
distribution as an option for systems/services that require a common
broadcast domain.

-- 
Brandon Ewing                                        (nicotine () warningg com)

Attachment: _bin
Description: