Latest threads in Ethernet LANshow only best voted threads

Subject Author Posted Replies
 
A tricky problem concerned with fragmentation and Logical link Layer service.
The following statements are based on DSRC protocol(see the end), however, I'm sure it also fits into other protocol as long as it has following characteristic: The upper layer supports fragmentation...
8
8
 
LLC and MAC headers
Hello. As far as I understood 802.3/802.2 standards, the MAC header holds LLC header carrying DSAP and SSAP fields etc. But where in practice this is utilized? In Ethernet networks I always find only...
5
5
 
Best Percentage Split for MM Ethernet Splitter?
I need to get a signal strength measurement on an 850nm gigabit ethernet signal without interfering with the signal. I can get a splitter, but I'm not clear on what percentages are appropriate for the...
 
Disable ingress or dhcp spoofing on enterasys switches
I have two enterasys switches running right now, with the default configuration They are simply connected via ethernet on port 24. I've add an ip and enabled snmp monitoring but thats about it. The...
 
Ethernet TAP
i am looking for a good Ethernet TAP with the following features 10/100/1000baseTx/Fx Ethernet Fiber-Ports with GBICs/SFPs Full-duplex measurement possible (aggregating TAP?!) any recommendations or...
2
2
 
Problem: UTP only works at 10 MHz
Why a UTP cable will work at 10 MHz but will not work at 100 MHz? The same four cables are used in both frequencies. I have that problem with some cables. Greetings from Paraguay. Claudio Bogado...
12
12
 
"Reserved" IP vs. manually-assigned?
Netgear RP614 router. Under the LAN configuration menu there are, among others, options for DHCP, and Manually-assigned IP addresses. Under DHCP there is also a table for reserving IP addresses. This...
20
20
 
NatSemi SONIC chip quirks sought
I have a piece of hardware that I'm trying to fix. It has a National Semiconductor DP83932 SONIC Ethernet controller in it. It's part of an embedded controller that cost a fortune, or else I'd just...
 
HP JetDirect card - assigning a fixed IP
JetDirect card J3111A/600N (10baseT, RJ-45). Logging into the card using a web browser, under Configurations tab, the TCP options can be found. One of the choices is to choose whether the IP address...
25
25
 
Four or Six Port MM LC Fiber PCI-X Cards for Windows??
Does any vendor make a four (preferably six) multimode fiber PCI-X ethernet card for Windows? The adapter receptacle would take LC connectors. I'm using this for a firewall.
 
-48VDC PoE 500m Extension
I'm hoping to find a set of extenders that will operate both ends off one end's 48v plant. I think 500m would be a good target, and we're going to use 100 bT circuits. Any ideas?
 
remote mirroring with extreme networks switch
is it possible to configure remote mirroring (port oder VLAN) across a network to another switch? anyone an example by chance? i am using i-series wwitches with ExtremeWare 7.6.
 
Chassis With Plug In Four Port GigE Switches?
Does any vendor make 2U to 3U enclosure that would take four port 10/100 or gigE copper switches that are totally isolated from each other? I really do not want to A) hassle with or B) pretend to...
 
Allied telesyn & VOIP
anyone know if the AT switches can split out the voice traffic into a separate vlan like ciscos can? some sites only have one ethernet port per workstation so the pc plugs into the voip phone then the...
4
4
 
SMC2804WBR v.2
I have used the above router with anADSL modem in Germany for two years and now want to set it up in the UK. In Germany the provider supplied a DSL modem to which I simply attached the router, which I...