0
votes
1answer
37 views

Ethernet switch signal quality

Is there a (significant) signal quality difference between ethernet switches? n other words: A 1000base-t, do some switches allow longer cable runs than other switches?
0
votes
1answer
26 views

Broadcast stop via loopback kills bandwidth

Why does creating a broadcast storm by directly connecting two ports on a switch cause the bandwidth to all the other ports to cease?
1
vote
1answer
117 views

Maximum throughput on switch with different link speeds

While doing some benchmarking on a network app I discovered strange behavior that involves 100MBit and 1GBit ethernet clients connected through a switch (at-gs900/8e). I have one server (Gbit) and ...
1
vote
2answers
122 views

Cisco sg100-08 connections

I have multiple computers, some have a 10/100 ethernet adapter while others have a 10/100/1000 ones. If I connect them together with the Cisco sg100-08 switch, do I keep the 1Gbit speed where possible ...
4
votes
1answer
586 views

1000 Mbit/s fiber switch to 100 Mbit/s fiber switch - no communication

This morning, I troubleshooted a fiber connection between two switches in the same building. It was a single-mode fiber. I knew this fiber was fine, because I had installed it myself and tested (with ...
0
votes
1answer
572 views

Recommend a nice managed Top Of Rack switch for Linux Computer Cluster (but it has to be cheap!) [closed]

I work at an industrial research lab, and we have a research group that's building up a Linux-based compute cluster. The have about 46 nodes so far, with more to come. They came to us a few months ago ...
2
votes
5answers
434 views

Cisco 3750 Gigabit ports

I'm looking for Cisco switches that provide 48 Gigabit ports. I've been through this list : CISCO PRODUCT REFERENCE and this one: DETAIL 3750 SWITCHES But there's something I don't understand: ...
1
vote
2answers
3k views

Best practice to trunk two GB switches?

I already read some similar questions but I still have no clue on how to do it the right way. I have a D-Link DGS-1248T 48 port GB-switch with 4 mini GBIC ports and I want to connect it to another ...
1
vote
2answers
317 views

Managed switch, what is the purpose of the two gigabit ports?

We have a managed switch that has been installed by phone engineers as part of our new IP phone system. The switch in question is a Nortel 2550T-PWR Ethernet Routing Switch 2550T-PWR with 24 ...
3
votes
4answers
1k views

Ethernet switch capacity question

We're looking at hooking up 48 small embedded systems with 10/100 Ethernet ports to an Ethernet switch and then have that switch talk to a server upstream via a faster connection. I have a couple of ...
0
votes
3answers
189 views

How to maximise performance in computers connected into LAN via Gigabit ethernet router?

Our group is setting up a server (which might just be a NAS, but we're not sure yet), which shares files, so that it connects to all other computers in the room (about 10 of them). I am thinking just ...
0
votes
2answers
1k views

Cisco SG300-28 vs Cisco/Linksys SRW2024 | Managed GB Switches

I'm trying to get a good managed Gigabit switch for our new 1/2 server rack, which will have about 6 servers within the next couple of months, plus firewall. From a pricing standpoint, both of these ...
3
votes
3answers
182 views

Link mode on unmanaged gigabit switches

I have two RJ45 sockets connected by an inaccessible unknown-category twisted pair cable. I plug two unmanaged gigabit switches into the sockets using Cat6 cables, and they negotiate a 100Mbps link. I ...
1
vote
2answers
1k views

Does Gigabit degrade all ports to 100 megabit if there is a 100 megabit device attached?

Our company is buying some HP Procurve managed gigabit switches to replace some of our core switches. However, we aren't able to upgrade all of our switches from 100Mb to Gigabit switches. I think I ...
2
votes
1answer
5k views

How does Brocade (Foundry) FastIron CX compare to Cisco 3750 stackable switches?

We're considering Brocade's CX series vs. Cisco's 3750 at both core and distribution layers for a new site with gig to desktop, without POE. If you have any hands-on experience with FastIron CX ...
22
votes
6answers
16k views

What is the minimum ethernet cable length for a CAT6 gigabit connection?

We run a Netgear GS724Tv3 switch and part of the configuration per port is an option for "Lower Power Mode". The documentation for the switch lists this feature as a "Green Ethernet Configuration" ...
1
vote
4answers
2k views

Gigabit ports on Dell Powerconnect 2324 never worked

I have a Dell Powerconnect 2324 with Gigabit ports - 24 ports 10/100 ports with 2 Gigabit ports - that never worked. It's supposed to auto-detect everything, but even trying different combinations I ...
1
vote
4answers
2k views

GigE ethernet switch backplane bandwidth

While looking for a 16- or 24-port gigabit ethernet switch with at least 6 VLANs and port mirroring (packet duplication to a monitoring port), I came up with three candidates (there are more): Cisco ...
0
votes
3answers
193 views

Switch Fabric Optimization

How does an ethernet switch work on a port-by-port basis? Specifications are given for the speed of the switch "fabric", but is that universal bandwidth through a central processor or are there ...
0
votes
5answers
3k views

What are my options in replacing the noisy fan in my Linksys Cisco SRW2008P managed GigE switch?

My first managed GigE switch, the Linksys SRW2008, was a dream, until it started randomly chattering on various ports. That started while I was on the road all the time, which made it take forever to ...