nanog mailing list archives
RE: Layer 2 vs. Layer 3 to TOR
From: "Bulger, Tim" <Tim_Bulger () polk com>
Date: Thu, 12 Nov 2009 15:40:26 -0500
If you use stackable switches, you can stack across cabinets (up to 3 with 1 meter Cisco 3750 Stackwise), and uplink on the ends. It's a pretty solid layout if you plan your port needs properly based on NIC density and cabinet size, plus you can cable cleanly to an adjacent cabinet's switch if necessary. Slightly off-topic.. Consider offloading 100Mb connections like PDUs, DRAC/iLO, etc. to lower cost switches to get the most out of your premium ports. -Tim -----Original Message----- From: Seth Mattinen [mailto:sethm () rollernet us] Sent: Thursday, November 12, 2009 3:20 PM To: 'nanog () nanog org' Subject: Re: Layer 2 vs. Layer 3 to TOR Steve Feldman wrote:
On Nov 12, 2009, at 2:48 PM, Raj Singh wrote:Guys, I am wondering how many of you are doing layer 3 to top of rack switches and what the pros and cons are. Also, if you are doing layer 3 to top of rack do you guys have any links to published white papers on it?Dani Roisman gave an excellent talk on this subject at NANOG 46 in Philadelpha: http://www.nanog.org/meetings/nanog46/abstracts.php?pt=MTQwOCZuYW5vZzQ2&nm=nanog46
I'd always wondered how you make a subnet available across racks with L3 rack switching. It seems that you don't. ~Seth
Current thread:
- Layer 2 vs. Layer 3 to TOR Raj Singh (Nov 12)
- RE: Layer 2 vs. Layer 3 to TOR Paul Stewart (Nov 12)
- RE: Layer 2 vs. Layer 3 to TOR Raj Singh (Nov 12)
- Re: Layer 2 vs. Layer 3 to TOR Malte von dem Hagen (Nov 12)
- RE: Layer 2 vs. Layer 3 to TOR George Bonser (Nov 12)
- Re: Layer 2 vs. Layer 3 to TOR David Coulson (Nov 12)
- RE: Layer 2 vs. Layer 3 to TOR Raj Singh (Nov 12)
- RE: Layer 2 vs. Layer 3 to TOR Paul Stewart (Nov 12)
- Re: Layer 2 vs. Layer 3 to TOR Steve Feldman (Nov 12)
- Re: Layer 2 vs. Layer 3 to TOR Seth Mattinen (Nov 12)
- Re: Layer 2 vs. Layer 3 to TOR Brandon Ewing (Nov 12)
- RE: Layer 2 vs. Layer 3 to TOR Bulger, Tim (Nov 12)
- Re: Layer 2 vs. Layer 3 to TOR Brandon Galbraith (Nov 12)
- Re: Layer 2 vs. Layer 3 to TOR Nick Hilliard (Nov 12)
- Re: Layer 2 vs. Layer 3 to TOR Kinkie (Nov 18)
- Re: Layer 2 vs. Layer 3 to TOR Eugeniu Patrascu (Nov 18)
- Re: Layer 2 vs. Layer 3 to TOR Chuck Anderson (Nov 18)
- Re: Layer 2 vs. Layer 3 to TOR Seth Mattinen (Nov 12)
- Re: Layer 2 vs. Layer 3 to TOR David Coulson (Nov 12)
- Re: Layer 2 vs. Layer 3 to TOR Jonathan Lassoff (Nov 12)
- Re: Layer 2 vs. Layer 3 to TOR David Coulson (Nov 12)
- Re: Layer 2 vs. Layer 3 to TOR Ćukasz Bromirski (Nov 12)
- Re: Layer 2 vs. Layer 3 to TOR Olof Kasselstrand (Nov 12)