Latest threads in Ethernet LANshow only best voted threads

Subject Author Posted Replies
 
Network Sniffer That Works Across Multiple Interfaces
I have a packet spoofing problem and I want to find a network sniffer that will allow me to look for any packet that has source or client IP set to a specific value on *any* attached interface. I use...
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ByPass 802.1x on Wired LAN
Dear all, I have been asked to perform a quick pen test of a CIsco VOIP system on a wired LAN which runs 802.1x. I'm not a VOIP or NAC expert so this is going to be basic stuff - only the most obvious...
 
MAC address table for each VLAN
Hello, some L2 switches have separate MAC address tables for VLANs, others don't and share the global one. Then for the latter case packets between two VLANs are forwarded, as long as there are...
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Bit U/L in the MAC address
Bonjour, Would you know if the bit U/L in the MAC address is always enforced, today ? Thanks for your opinion, best regards, Michelot What do you mean by "always?" If I remember the story, there were...
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Connectionless mode
Bonjour, Is the Ethernet broadcast process (today) is a sufficient condition to say that Ethernet is connectionless? Thanks for your advice, Michelot Bonjour, Indeed Michelot. Broadcast is...
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RFC 2665 error on intel
Hi All RFC 2665 defines "dot3StatsInternalMacReceiveErrors" as a implementation dependent counter for errors while receiving an ethernet frame. Intel defines this error as follows: RMII_FRM_ALN_ERROR...
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Extending IPv4 with source translation/source privacy.
Hello, The internet protocol version 4 could be extended with source translation/source privacy. The idea is as follows: The is translated into something else/arbitrary along the path's routers to...
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USB _to_ RJ45 (not from) connection
I have an Android phone which can share its G3 IP connection with my laptop via the provided USB cable. That works fine: the phone notices when the USB cable is plugged into the laptop (presumably...
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10HD vs. 100FD
Hello, 1) suppose two ports with the settings from the subject line attempt to communicate. I can't find in the 802.3 standard description of the exact behavior in such situation (obviously...
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Isolating Internet Users
Hi, newbie would like some help please. I have a wireless network on a new static home camp site. It only has two campers at the moment, but this will increase in numbers over time. My set-up uses a...
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Replacement for Netgear GS108
The Netgear GS108 10/100/1000 gige switch apparently has some known issues that result in its dropping computers from a network. Can someone recommend a very small 8 port switch that can be used for...
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Bridges and ethernet multicast packet flooding?
Sanity check: If I have an unmanaged bridge (or, in this case, a wireless client-to-ethernet adapter, connects to a wifi network, allows hardware with ethernet plug to be connected to the wifi...
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Best Finisar SFP for GigE?
We have some six port ethernet cards that take SFP modules for each port. The manufacturer recommends Finisar brand SFPs without specifying a specific part number. Finisar appears to have many dozens...
 
VLAN filter id (fid)
Hi, I encountered this term on a few VLAN aware devices, but can not udnerstand its exact meaning and how it correspondts to VLAN itself. So it seems it has different from Vlan ID meaning; or is it a...
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Multicast MAC addresses that always flood
Cisco bridges running a multicast suppression mechanism will always flood multicast frames destined for 01-00-5E-00-00-00 to 01-00-5E-00-00-FF. This looks like an attempt to preserve operation of...
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