Re: reliably detecting the presence of a bridge?

2015-12-15 Thread Andrew McConachie
Flip a bit in the Ethernet FCS as it egresses deviceA. If the frame arrives with a correct checksum at deviceB, then there's a switch in the middle. Most modern switches recalculate FCS at egress port. If the frame never arrives, most likely there is a switch in between. If the frame arrives

Re: NANOG College Immersion Program

2014-09-27 Thread Andrew McConachie
are there? Thanks, Andrew McConachie On 9/26/14 2:44 PM, Dave Temkin wrote: Yes, the professor will need to apply on behalf of the students that they wish to send, as NANOG will not be directly involved in their coursework. Regards, -Dave On Fri, Sep 26, 2014 at 2:41 PM, Colin McIntosh cmcintos

Re: switch 10G standalone TOR, core to DC

2013-02-12 Thread Andrew McConachie
On Thu, Feb 7, 2013 at 12:55 PM, Nick Hilliard n...@foobar.org wrote: On 29/01/2013 11:58, Nick Hilliard wrote: None of them will do trill. The Extreme X670 and Juniper EX4550 will both do VPLS, though. The X670 won't do BGP. this is incorrect: the ex4550 will do l2vpn/l3vpn but not

Re: switch 10G standalone TOR, core to DC

2013-02-12 Thread Andrew McConachie
On Tue, Feb 12, 2013 at 1:15 PM, Nick Hilliard n...@foobar.org wrote: On 12/02/2013 12:09, Andrew McConachie wrote: I normally just lurk but I thought I would post to clear up the confusion. Full disclosure, I am an Extreme Networks TAC engineer. The x450 does not support any VPLS/H

Re: airFiber

2012-03-31 Thread Andrew McConachie
Is this any different than what GigaBeam tried before they went bankrupt. http://www.globenewswire.com/newsroom/news.html?d=177145 Their website only shows a control panel login now so I think they've gone completely out of business. The only reason I know about them is because one of my