reliably detecting the presence of a bridge?

I am curious if there is some sort of igmp or other form of message that would reliably detect if a switch had a bridge on it. How could deviceA detect deviceC was a bridge in this case? deviceA -> ethernet switch -> deviceB ethernet switch -> deviceC with bridged wifi and

AT (SBC Global) email admins?

I hate going this route, but repeated attempts at all other avenues have been exhausted. We have a customer IP that has been blocked from sending email to SBC Global addresses since day one. The options AT has presented for dealing with this clearly have no effect or simply don't work

RE: John McAfee: Massive DDoS attack on the internet was from smartphone botnet on popular app

Good stuff from Duane here: http://www.circleid.com/posts/20151215_verisign_perspective_on_recent_root_s erver_attacks/ Frank -Original Message- From: NANOG [mailto:nanog-boun...@nanog.org] On Behalf Of Tony Finch Sent: Monday, December 14, 2015 4:27 AM To: Jim Shankland

Nat

Dear All, We are using cisco for natting, we'd like to change it to another brand like A10 or Citrix. Please any advice regarding the three brands and what are the advantages and disadvantages for each one? Regards,

Re: reliably detecting the presence of a bridge?

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: Opinions on Cologix data centers?

I recommend them for everything other than the quality of their remote hands. They could do with some improvements in this department. We have space at Cologix Dallas (within Infomart), and it's all fine. We run our own ASN too though, so no idea on the bandwidth side of things. On

Re: reliably detecting the presence of a bridge?

On Tue, Dec 15, 2015 at 10:48:50AM +0100, Dave Taht wrote: > I am curious if there is some sort of igmp or other form of message > that would reliably detect if a switch had a bridge on it. How could > deviceA detect deviceC was a bridge in this case? > > deviceA -> ethernet switch -> deviceB >

Re: Nat

You are using a Cisco what for NAT? And which products are you considering? On Tuesday, December 15, 2015, Ahmed Munaf wrote: > Dear All, > > We are using cisco for natting, we'd like to change it to another brand > like A10 or Citrix. > > Please any advice regarding

Re: reliably detecting the presence of a bridge?

Why do you care if there's a bridge? Seems you care about higher latency, packet loss, lower reliability, etc. Measure what matters and act on that, rather than trying to guess performance from link type. Matthew Kaufman (Sent from my iPhone) > On Dec 15, 2015, at 5:48 AM, Dave Taht

RE: Nat

What features and scale do you need? Assume with NAT you are performing some levels of firewall security and serving applications? Sincerely, Nick Ellermann - CTO & VP Cloud Services BroadAspect   E: nellerm...@broadaspect.com P: 703-297-4639 F: 703-996-4443   THIS COMMUNICATION MAY CONTAIN

Re: reliably detecting the presence of a bridge?

On Tue, Dec 15, 2015 at 4:48 AM, Dave Taht wrote: > I am curious if there is some sort of igmp or other form of message > that would reliably detect if a switch had a bridge on it. How could > deviceA detect deviceC was a bridge in this case? Hi Dave, Start with precision