Snort mailing list archives
Re: Is it really a HUB?
From: Matt Kettler <mkettler () evi-inc com>
Date: Wed, 26 Nov 2003 13:49:00 -0500
At 12:57 PM 11/26/2003, Petriz, Pablo wrote:
- Built-in high-speed bridge function automatically connects 10BaseT and 100BaseT workstations without an external switch or router. - Embedded switch supports store-and-forward switching and filtering and forwarding rate at full-wire speed. So i don't know if snort will see all the traffic on it...
No, it won't...auto-bridging means that (at least) the transition between 10mbit and 100mbit is switched.
It is in fact IMPOSSIBLE to have a dual-speed hub which is a pure hub when presented with mixed traffic speeds.. no.. really.. it's actually impossible. If you tried every port would have to throttle down to 10mbit and you'd have a 10mbit hub.
Based on the description, which may differ from reality, all the 100mbit ports might see each other's traffic, and all the 10mbit ports might see each other's traffic, but they will definitely not see traffic from ports of different speeds.
The problem is that the actual implementation may have more switching behavior than advertized.. all they've guaranteed is that the 10/100 segments are bridged.. but that doesn't mean that the 100mbit ports can't be fully switched with respect to each other too.
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Current thread:
- Re: Is it really a HUB?, (continued)
- Re: Is it really a HUB? Rich Adamson (Oct 25)
- Re: Is it really a HUB? Mike Cojocea (Oct 27)
- Re: Is it really a HUB? Kristofer T. Karas (Oct 27)
- Re: Is it really a HUB? Marc Quibell (Oct 28)
- Re: Is it really a HUB? Kristofer T. Karas (Oct 28)
- Re: Is it really a HUB? Darryl Luff (Oct 28)
- Re: Is it really a HUB? Kristofer T. Karas (Oct 29)
- Re: Is it really a HUB? Kristofer T. Karas (Oct 28)
- Re: Is it really a HUB? Marc Quibell (Oct 28)
- RE: Is it really a HUB? Potts, Ross A. (Oct 29)
- Re: Is it really a HUB? Petriz, Pablo (Nov 26)
- Re: Is it really a HUB? Matt Kettler (Nov 26)
- Re: Is it really a HUB? kenw (Nov 27)
- Re: Is it really a HUB? Matt Kettler (Nov 28)
- Re: Is it really a HUB? kenw (Nov 28)
- Re: Is it really a HUB? Matt Kettler (Nov 28)
- Re: Is it really a HUB? kenw (Nov 28)
- Re: Is it really a HUB? Matt Kettler (Nov 26)