Latest threads in Ethernet LANshow only best voted threads
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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...
5
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13 years ago
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5 | |
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Broadband or not
There is discussion in some newsgroups (and other places) about what is and isn't broadband. It seems to me that the meaning, in EE terms, relates to the bandwidth relative to the carrier frequency,...
7
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13 years ago
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switch ports as distinct OS interfaces
We're designing a network device based around SoC, which contains MIPS core and 5-ports switch core, connected to the CPU via internal MII port. Device driver provided by a chip vendor represents...
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13 years ago
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Ethernet over Ethernet
Bonjour, I don't know the reason why it is not possible to have an Ethernet frame (ETH) directly encapsulated in an Ethernet frame (ETH). Take care, I'm not talking about 802.1ah-2008 MAC-in-MAC, or...
17
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13 years ago
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17 | |
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question on MDIO bus
[ I beleive this is proper groups to ask such question. ] I'm implementing MDIO/MDC interface with GPIO pins on a microcontroller (i.e. one pin for MDIO line, and the other is for clock). I have read...
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13 years ago
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Network latency questions
This should have been in - followups set accordingly. Frans Grotepass wrote: "How long is a piece of string?" "It depends." An unloaded Gigabit Ethernet network might have quite low latency, but at...
2
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13 years ago
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Multi-WAN switch
Is there any switch that allows two different WAN and multiple LANs running out of a single wire? Let me clarify my question with a picture: the top, the current configuration. The distance between...
3
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13 years ago
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3 | |
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LACP mac addrss ?
The link aggregation combine a couple of physical links to a logic link. but which mac address is used for the LACP group? TIA, st
3
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13 years ago
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switch-to-CPU interface
Reading Rich Seifert's "The switch book", I got confused. At one moment Mr. Seifert writes that normally there are two interfaces CPU-to-switch: one is simply control interface to read/write the...
1
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14 years ago
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1 | |
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Reset the password on my HomePortal 1000SW?
Have a modem and wireless router. HomePortal 1000SW, 3.5.5 Trying to get past the lost password. FWIW. I take lots of notes, but none of the recorded passwords work. Apparently, a more recent version...
1
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14 years ago
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1 | |
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MII Management Interface, turnaround bits
Hi I'm implementing software GPIO based SMI protocol for a small embedded microcontroller, and got stuck with turnaround bits. As I understand it, after reading 802.3 spec, it consists of two bits,...
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14 years ago
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switch auto polling
Hello, everybody reading through specs of switch ASICs I often find the term "auto polling". What exactly does it mean? As I understand it is hardware assisted feature of the switch, constantly...
1
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14 years ago
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why does cisco support 16 instance for mstp?
Hi, why does almost network company support only 16 instance for mstp? TIA, st
6
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14 years ago
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6 | |
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Ethernet Padding
Hi All, This post is related to Ethernet padding. When the payload is small, Ethernet adds padding to make the frame size to 64 bytes. (Ethernet's minimum frame size is 64 bytes). This padding, will...
5
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14 years ago
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tolerating loops in a network but not using STP
I'm designing a low latency ethernet network for ~300 servers (a compute cluster). End-to-end latencies are pretty low so that switching latency becomes critical. Each additional switch hop adds, say,...
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14 years ago
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