No Connectivity to Red Hat Linux

Im failing to ping/putty my Linux box. I can ping from it and even after restarting iptables, xinetd, services, checked ports and even loopback address am at a loss?!?!? Software/Hardware used: RED Hat 8.5

Dark fiber vs. SONET

What is the difference between dark fiber and SONET relating to the 10GBaseER/EW. "ER is deployed over dark fiber and EW is used primarily with SONET". I am not grasping this due to the fact that I though dark fiber is generally fiber not in use."unlit". And also I though ER dealt with computer...

Network goes down when one particular computer connects

I have 5 computer sharing a network sharing a common router but recently i am having a problem in which when one particular computer is opened the whole network goes down and none of the computer is able to connect to the internet. what could be the reason for it? Is it because of some kind of...

Stress testing network and file servers before launch

Is there an application I can run to stress test my network and file servers? I want to make sure they will not die under stress when we go live with 2000+ users. Is there a product that can do this or will we need to script something? If that is the case are there any whitepapers or guides on...

Network Testing, Slow ping

Hello all, I have just contacted a local firm to do a re-cabling to cat 6 for my company. But after the execrise. i decided to do a ping to see the time it take to ping. 1st i use a Cat6 and ping one of my server.  Below is the reply. Reply from 192.168.x.x: bytes = 32 time = 57 TTL128 Reply...

need recommendations for a bit error rate tester

Hi all,[Br style="font-family: Arial, Helvetica;" /][Br style="font-family: Arial, Helvetica;" /]trying to find a BERT that supports 10Gbps, 1Gbps and Fast Ethernet so that when someone points the finger at the network team for packet lost, i can prove that theres nth wrong with the network link....

NTttcp errors & retransmit threshold

Hello All, We trying to do some network quality  assessment in our organization , for that we choose NTttcp tool that comes from Microsoft , and started to do some test. looking at results of some test we done each test for 1 min approx  i can see few erros and retransmit , my question is how to...

Hp openview Training

where can i get the training of HP openview in middleeast region Software/Hardware used: HP

ping-Request timed out problem

hello i have two computers. one computer(A) is a leptop of HP the second(B) is regular pc. when A send ping to B it gets Request timed out. and when B send ping to A it gets also Request timed out. but the two of them can ping the defult gateway. i disable the firewall on A and nothing. what is...

CompTIA Network+ 2009

What book or online testing practice will be better to study for Comptia network+ 2009 exam?

Can't open PDFs from certain websites

I am long-winded, so please bare with me! We are having trouble opening pdfs on certain websites. Currently PDPworks as well as one of our vendors who uses twelvehorses.com as a pdf server. We are unable to open a pdf from pdpworks at all and are hit and miss with opening pdfs from...

Tools for checking Network response time

Some of my users are using remote login. Access is through user VPN & internet connection is through data card.I want to test the response item.The service provider does not allow unique ip address in data card in which case ping is ruled out.What is the way out?

Intermittent access to Web portal although Ping results are positive

I'm puzzled by our network connectivity between our main office and project site. From the project site, ping results to both web servers in the main office have no loss but just could not have access to main office web portals (port 80 and 81). The 'page disconnection' happens very frequently and...

Network

I'm not really sure but I believe that this is a netwoprk issue, we have been experincing that some of our PC's either take to long to logon to windows domain, also some of the applications take to long to open (three min or more) e.g. Lotus Notes, iSeries emulator, IE, and, some times if they have...

RAD MODEM LOOPING

how to take loop test on HTU E1 Leased line modem to test physical connectivity

network testing lab

How to set up a small testing lab for the network. I have some computers,KVM I don't know what else is required and how to set the devices.

Connectivity Testing

1) Connectivity between DMZ Server and Application Server 2) Application Serever to Database Server 3) Load Balancer to Application Server / Database Server Please suggest the sequence of Steps to check the connectivity between these layers (Telnet, FTP Tests etc.) which will be immensely...

Tools similar to Wireshark

Does anyone have experience with shareware/freeware tools similar to wireshark. I am looking at a tool that is simple to use by application teams as they are doing development (mostly .NET) that can highlight WAN performance issues early on. It should be simple to understand and interpret by...

Utility to measure Network congestion

I am looking for a tool (hopefully freeware) to measure network utilization and collision rate? Hopefully an executable that does not require intallation. Yes, Performance Monitor built into Windows can do it, but I don't have the patience to spend 2 hours trying to figure out how to set it up....

Testing network performace

What is the best way or tool to test network, to see if it is running at optimal speed etc. Thanks.