Tagged Questions
0
votes
2answers
175 views
24 Port Switch versus 4 x 8 Port Switch
While prices for switches in the end-customer sector are decreasing, I found that 24 port switches are much more expensive than multiple 8 port switches with the same speed.
Are there any ...
3
votes
1answer
105 views
How to use a switch as a network tap?
I would like to tcpdump all traffic that my router does when it makes a firmware update.
So I have taken a HP ProCurve 1800-8G switch and mirrored port 7 to port 8.
I have connected:
Internet ...
3
votes
2answers
107 views
What are cables/boxes called for listening in on a RJ45 cable?
I would like to capture the traffic from a router, so I assume there must exist a cable or hardware box with 3 RJ45 socks, where two of them are IN and OUT, and the third is for capturing device (a ...
0
votes
1answer
24 views
hosting machine capability [duplicate]
I'm curios what's the traffic a dual-socket CPU server machine can handle?
Just hypothetical, does anybody have a clue what are the keystones?
Is it more about hardware or connection or anything else ...
1
vote
2answers
152 views
High number of ethernet errors. Tool for testing the ethernet card? [closed]
have an Asus Sabertooth X79.
I often get corrupted files. I checked the RAM, but memtest finds no errors. To avoid the possibility of disk errors, I tried copying files to tmpfs.
If I copy from the ...
-1
votes
1answer
64 views
Difference between storage and operating temperatures [closed]
What is the difference between Operating temperatue & storage temperature of switch C3560E ?
-3
votes
1answer
60 views
How much RAM and CPU throughput can handle 20GE in Cloud? [closed]
We're going to build a cloud infrastructure and would like to use the HP DL160 G8 with a 20GE NIC (2x10GE LACP).
How much RAM and CPU can handle this NIC?
The server will have at least 2x Intel ...
7
votes
2answers
165 views
10GBASE-T shielded cable switch-to-server connection
I'm venturing for the first time into the 10 gigabit (over copper) realm. Likewise, I have never worked with shielded CAT-5/6 cables previously. From my own research, I understand the types and ...
2
votes
2answers
136 views
If I have computers linked through a switch, will they communicate directly?
If I have a network like:
Group1 -> Switch -> Switch -> Server (configured as gateway by DHCP)
Group2 -> Switch -----^
(Hope that makes sense...)
When computers in each group send ...
0
votes
1answer
173 views
What would cause this file transfer slowdown?
This screenshot is of me transferring a large file (a .VHD) from one logical volume (made of 2 spindles in RAID0) to another one (made of 2 spindles in RAID0) on the same physical machine. (This is ...
0
votes
1answer
37 views
Compatibility between D-Link Media Converter Chassis and TRENDnet Media Converter Chassis
I am working on an experimental networking project. This project will involve a number of twisted-pair to fiber optic media converters.
Due to the number of converters we will be using, we are ...
-3
votes
2answers
63 views
How do i create a 'layer' in between my router and a user connecting to it [closed]
Like when you go to starbucks the first thing you see if you go to their wifi is "Welcome to starbucks, please accept our terms". Or also at most airports, it makes it impossible to surf until you ...
0
votes
0answers
49 views
NIC randomly loses link while booting (Scientific Linux 6.1)
About half the time, when rebooting or cold booting my Linux system, my NIC loses link with the network (i.e. the link light on the NIC goes dark). Sometimes I am able to re-establish the link by ...
-1
votes
2answers
212 views
How to create a separated network to customers only?
I work in a company where we have a network ethernet and wi-fi, we would like to create a network where our customers could access our network but don't have access to our computer network.
This ...
5
votes
1answer
210 views
Hardware/topology recommendations for low latency UDP network
I'm setting up a LAN comprised of 60 end nodes that are receiving a high volume of UPD datagrams from one master server.
The server sends 60 unique datagrams every 100ms, each datagram is 64 bytes. ...
-3
votes
1answer
349 views
'Gigabit' Ethernet Port Tester? [closed]
A quick google search shows there seems to only exist handheld testers for 10/100 Ethernet ports. Any ideas why that is and where we could find one that works with a Gigabit LAN? Perhaps the 10/100 ...
1
vote
1answer
47 views
Is there a way to get an “extension board” for a Polycom IP6000 phone? [closed]
I don't see any for sale, but is there a way to get one hooked up to it? Basically, I need 15+ speed dials.
Something like this would be great, but for the Polycom instead of Grandstream:
...
0
votes
1answer
128 views
TL-WR1043 stop working [closed]
I have TL-WR1043ND with one of the latest firmware version (3.13.5 Build 111122 Rel.55501n)
and I need to reboot the device too often, because it is stop to work (no ssid broadcasting no internee ...
16
votes
2answers
2k views
What is the command to flash a NIC link light?
I remember using a command line tool to flash a NIC's link light to identify it. I can't remember for the life of me what it was.
1
vote
2answers
235 views
NSLookup very inconsistent, slow, failing. Not Hardware error or OS Error. Can't identify problem
Multiple computers inside the network run various OSes, and connect through Wi-Fi or Physical connection. My desktop runs Ubuntu 11.04 64 bit, and has consistently slow or failing NSLookups.
I bought ...
2
votes
1answer
80 views
Network-capable small format display? [closed]
I am working on a project for per-station messaging and other functions in a warehouse. I don't want the cost of a full computer at each station, so I'm looking for small format hardware that I can ...
0
votes
1answer
179 views
Slow network performance when I open files from a local network server [closed]
When I try to open a file from a network share, the file takes much longer than expected to open. It will eventuallly open, but is very slow I have restared both the server and my local computer, ...
1
vote
2answers
93 views
Which tool: graph business services and their technology dependencies
I'm looking to give our company an overview of the business services that IT offers and their various dependencies.
The purpose of this graph would be to show the dependencies of technology on ...
1
vote
4answers
812 views
Network card suddently doesn't answer anymore, but answers after pinging
We have a problem with the network card on a Dell Power Edge R410 with Debian 6 (squeeze). It seems that the network card went into "sleep" mode after some time. If we are connected via ssh to the ...
0
votes
1answer
160 views
CentOS can I connect mobile and remotely from a laptop using another mobile connect to ssh or ssh -x?
Case: I placed one rack mounted server which has only intra-network activity (do not require any kind of internet access just for the service).
Issues: But many times it requires remote access, in ...
2
votes
3answers
134 views
What is hub and switch? Do they function same? [duplicate]
Possible Duplicate:
What is the difference between a hub and a switch?
I have Cisco 2900 catalyst. And i have other hardwares for networking. But what is the difference between HUB and ...
0
votes
1answer
269 views
motherboard selection for VMware ESX or Xen
any motherboards using compatile NIC chipsets for VMware ESXi4.1 or Xen 3.4?
all major manufacturers ASUS, MSI, Gigabyte seem to be using either Realtek or VIA based chips for NIC which so not have ...
1
vote
2answers
188 views
cisco 6500 crash enabling netflow
i have a cisco 6503 running IOS 12.2(33)sxi5 and i'm trying to enable netflow.
Following the instructions here http://www.manageengine.com/products/netflow/help/cisco-netflow/cisco-ios-netflow.html ...
2
votes
2answers
80 views
Which Windows Server
I work with a company that has an old server that uses Windows 2000. They really only use this thing as a file server / "always-on" computer. They use quickbooks enterprise, quickbooks POS, UPS, and ...
3
votes
4answers
261 views
Router recommendation to virtualize 800 IPs
I've recently been looking at getting some new load balancers for our environment as we are expecting to double our client base in the next 12 months.
Currently we have 400 public IPS serving 800 ...
3
votes
4answers
564 views
What is the difference between SAN Hard Drives and Normal Hard Drives?
At work, we have decided to finally virtualize and have decided to upgrade out SAN setup with higher capacity Hard Drives. However, what exactly is the difference between Hard Drives that come ...
0
votes
3answers
266 views
1 Computer Pulls Wrong DNS Every Morning
One of my users takes his laptop home, connects to his home network fine. He brings it in every morning and since Monday - every morning it pulls the wrong DNS every time. It pulls 1 DNS: 192.168.1.1 ...
1
vote
4answers
451 views
monitor-less Linux box on my laptop screen
I have a box which I want to install linux on, but it doesn't have a monitor. Are there ways to work on this linux box through my laptop screen?
I heard it's possible to work on a headless box if ...
1
vote
2answers
177 views
Internet access for a number of diffirent VLAN's
There is about 60 UTP cables coming from some different offices into a server room. Every cable could be lead to a single computer or the unmanaged network switch. I need to give them all an ...
1
vote
4answers
954 views
Cost effective way to handle high SSL traffic?
Some time in the future, I may need to build a dedicated SSL farm (as described in Making applications scalable with Load Balancing) or something similar to handle lots of SSL traffic. While it's not ...
2
votes
3answers
163 views
How do I know if an off the shelf switch is vlan capable?
I have a managed switch that handles the vlan config. VoIP phones run on one, everything else on another. I need to buy some off the shelf switches due to the difficulty of adding another drop in some ...
0
votes
2answers
694 views
Home and Small to Medium Enterprise network manufacturer choice, Netgear, Linksys or D-Link?
I am looking for an alternative to Cisco (too expensive for me !) for semi-pro utilization (at home but with advanced feature (I'm studying in IT)) and in small/medium enterprises.
I think I will ...
5
votes
9answers
3k views
Why DELL PowerConnect and Juniper are so rare ? Why do enterprises stick with Cisco?
I have a little question, I'm actually studing IT in France, and when looking on alternative on the very [...] very expensive Cisco equipments, I've found Juniper and DELL PowerConnect pretty ...
2
votes
3answers
188 views
Software for network hardware asset management, quite big problem!
Not an issue for a small network, but becomes a pain when it grows. How can I track what ever happens to my network's hardware (repairs, upgrades, whatever) if I don't want to dig into loads of Excel ...
4
votes
3answers
3k views
Kernel Log “TCP: Treason uncloaked!”
On one linux server (Gentoo hardened), we are experiencing bursts of the following messages in dmesg from time to time:
TCP: Treason uncloaked! Peer xx.xx.xxx.xxx:65039/80 shrinks window ...
2
votes
1answer
322 views
Need a dumb switch or a smart hub
So here is my goal.
I have a number of interfaces that I want to use to playback recorded traffic. I also have a number of interfaces that I want to use the listen to the recorded traffic. I'd like ...
0
votes
5answers
413 views
What do I need to transform my network from Ethernet to WiFi?
I'd like to know what is the best Hardware to install/buy to transform the whole network of my company from Ethernet to WiFi (keeping Ethernet for security first...).
There are 2 servers and 12 ...
1
vote
7answers
329 views
How to get info about my network software & hardware?
I have a lot of computers in my network and I need to get information about the software and hardware installed on all of them. In other words I want to have something like the pc network inventory, ...
3
votes
1answer
823 views
Many dropped packets on NIC
I've noticed a very large count of dropped packets in the NICs of some of my servers.
Have you seen something like this before? Any idea on what can be the problem?
Below there's some information ...
0
votes
4answers
303 views
What network equipment do I need for a small quarter-bay server farm?
I've just bought four servers, rented a quarter of server bay, bought some Internet connectivity, bought a specialized line to a private network I'm using, and now I need to buy a router (or two?) to ...
1
vote
3answers
423 views
Does KVM-over-IP typically hijack a NIC
I'm working with a Tyan S7010 motherboard, which has a built-in AST2050 IPMI module with KVM-over-IP functionality. The board has 2 physical NICs built in. There appears to be 3 MAC addresses on the ...
3
votes
3answers
676 views
PCI-Express hierarchical architecture — where is the weakest node
I'm wondering about the fact, that PCI architecture is hierarchical. Therefore, even if I have two PCIx4 slots, it's possible that I will not be able to fully utilize it, because the slots will ...
0
votes
3answers
1k views
How many hardware (PCI-MSI) interrupts can a PC have?
On my workstation I got only two PCI-MSI interrupts in /proc/interrupts:
0: 11726919 0 IO-APIC-edge timer
1: 3 0 IO-APIC-edge i8042
7: 0 0 ...
2
votes
4answers
2k views
Can I use Third Party Compact Flash in a Juniper M10i Router?
Juniper list price for 1GB of CF is around 100 times what I would expect to pay for a third party card.
The J-Series release notes have a list of supported third party parts, but there is no ...
0
votes
4answers
662 views
Small Business Network Hardware
I'm looking for advice on setting up a small business network for a start-up retail company.
We're a five-man outfit. We need email, file sharing, printing, scanning etc. We have a bespoke ...
