Layer 2 vs. Layer 3 to TOR
nicotine at warningg.com
Thu Nov 12 20:39:01 UTC 2009
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.
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
Brandon Ewing (nicotine at warningg.com)
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