Search results

R
VOIP multiple lines problem

If the calls are over SIP this screams lack of bandwidth. It may be the link is also used for data and some one is uploading or downloading when this happens. Could be router issue as well. For small routers turn off the SIP ALG. Rob.
- robmurphy
- Post #3
- Sep 13, 2012
- Forum: Networking
R
Recomendations for new motherboard fot ESXi

I did read the article on this. It looks good but there is no indication about VT D or ESXi support and they are the most important features. The new machine will be used to simulate a production machine running ESXi. Thanks Rob.
- robmurphy
- Post #3
- Sep 9, 2012
- Forum: Motherboards
R
Recomendations for new motherboard fot ESXi

I want to build an ESXi test server. Priority list: full virtualization support for both VT X and VT D. good NICs supported by ESXi. At least 1 PCIE x4 slot for additional quad port card from intel that again is intended for virtualisation using VT D. At least 4 SATA connections...
- robmurphy
- Thread
- Sep 9, 2012
- Replies: 6
- Forum: Motherboards
R
Recommend a dual WAN wireless router

There are a few things to be aware on RV042. A firmware release late last year broke SIP calls. This is on the support pages. A fix was done that added other functionality. I was supposed to test this but have been unable as am ill at momemt. Some one else has probably done testing...
- robmurphy
- Post #7
- Sep 9, 2012
- Forum: Networking
R
CAT 5 maximum theoretical transfer rate under Windows 7 Ultimate x64

For Gigabit Ethernet Cat5E is fine up to the 100M max for Ethernet. Over 100M is out of the standard. Cat6 is no quicker than Cat5E on a Gigabit network. I've seen quite a few 2 pair Cat5 patch leads supplied with routers over the last few years. Easy to check just look at the ends. On most...
- robmurphy
- Post #11
- Jul 30, 2012
- Forum: Networking
R
Just need Stable Router

While old PCs make good routers with something like pfsense they also use loads of power, and over a year this adds up. I'd have to disagree on torrents. There great for rapid distribution of large files. Some Linux builds have long been using torrents as a means of distribution. Rob
- robmurphy
- Post #26
- Jul 29, 2012
- Forum: Networking
R
Just need Stable Router

Stable for software does not mean much when the hardware is getting well past its intended end of life. Consumer equipment is not really made to keep going for years. I know there are no moving parts but electronics especially chips ect do reach a point that they start to fail. Buying old...
- robmurphy
- Post #20
- Jul 26, 2012
- Forum: Networking
R
Just need Stable Router

The other thing with the WRT-54 range now is that they must all be quite old. Most of these home routers run quite warm so are they not going to start and have hardware errors/failures? Even if I was only going to use G I would not buy an old WRT-54 as my main router. If I had one as my main...
- robmurphy
- Post #15
- Jul 25, 2012
- Forum: Networking
R
Has anyone reviewed AMD's E1-1200 or E2-1800?

Android tablet or netbook like Transformer Prime? Rob.
- robmurphy
- Post #21
- Jul 19, 2012
- Forum: CPUs and Overclocking
R
Upgrade CPU from Phenom 810 to 960T or 965

This is one of the reasons I want to leave the new platform for a good few months. The new AMD chip looks promising, but then when bulldozer was announced it sounded good. I'm sure there will be quite a few tests comparing Ivy Bridge and Vishera. Only down side is that Vishera looks very much...
- robmurphy
- Post #23
- Jul 18, 2012
- Forum: CPUs and Overclocking
R
Upgrade CPU from Phenom 810 to 960T or 965

As I said I will be building a new Intel system. If there is a ready made server that is ultra quiet on idle I may consider it. I had thought about the socket 2011 systems. Much will depend on price and cash flow. Real question is that will 32 GB of memory be enough. From memory the new...
- robmurphy
- Post #19
- Jul 17, 2012
- Forum: CPUs and Overclocking
R
Upgrade CPU from Phenom 810 to 960T or 965

The other advantage to re-installing Win7 now is that at present there is no licensed software on the machine, other than Win7. The Win7 was the full retail one so re-installing it on 64 bit will not be a problem. I did ask MS about this before buying it. I'll probably put MS office on the...
- robmurphy
- Post #16
- Jul 17, 2012
- Forum: CPUs and Overclocking
R
What sort of switch

The Ethernet standard is quite clear on this. 90M solid core and the remaining 10M for patch leads either end. Total length 100M max. If you running Ethernet outside you have other things to consider like the type of cable, does it run in some for of enclosure, lightning protection. Fibre...
- robmurphy
- Post #6
- Jul 17, 2012
- Forum: Networking
R
Upgrade CPU from Phenom 810 to 960T or 965

A linux desktop may not need much horsepower. Compiling large builds, L3 routing and load balancing at gigabit speed, generating 50 to 60K BHCA SIP call attempts, large file compressions, and running multiple virtual machines doing all of the above can well require shed loads of horsepower...
- robmurphy
- Post #14
- Jul 17, 2012
- Forum: CPUs and Overclocking
R
why dont most consumer routers have an option to block bitorrent

I think you need L7 packet filtering to do this. Very few home routers can do this. Some linux routers may be able to do this. You would probably need an X86 based system to have enough CPU power for this. The opening of TCP connections will not block torrents now. Many torrents are using...
- robmurphy
- Post #8
- Jul 16, 2012
- Forum: Networking
R
Most websites load, a few don't, tried on multiple devices

Sounds like an MTU problem. Virgin Media in the UK would not load many sites, one of them being my web based email. I raised it with the email provider and they said Virgin had problems with MTU size in their network. On the router attached to the cable modem I dropped the MTU to 1000. This...
- robmurphy
- Post #5
- Jul 16, 2012
- Forum: Networking
R
Upgrade CPU from Phenom 810 to 960T or 965

As said there is no point in upgrading the motherboard. I might as well start on building a new AMD based system. I'm going Intel for the next one. The price of the motherboard mentioned is more than an Intel motherboard with VT-D shown at the moment. Thats with the new chipset as well. The...
- robmurphy
- Post #11
- Jul 16, 2012
- Forum: CPUs and Overclocking
R
Upgrade CPU from Phenom 810 to 960T or 965

The VT-D will allow the virtual machine direct access to the IO for the hardware. Without VT-D the network IO must via the host system, and then the host system does the IO. In this way VT-D removes several copies of the data, and it will probably avoid some context switches if they are used...
- robmurphy
- Post #8
- Jul 16, 2012
- Forum: CPUs and Overclocking
R
Upgrade CPU from Phenom 810 to 960T or 965

The VT-D is for networking. The main interest is routers, and various telephony platforms. All of these are Linux (usually CentOS) based. VT-D with the correct intel NICs can make a difference in throughput. Also what is done on the Intel platform may well end up on other virtual platforms...
- robmurphy
- Post #6
- Jul 16, 2012
- Forum: CPUs and Overclocking
R
Upgrade CPU from Phenom 810 to 960T or 965

There is no point in upgrading the present motherboard. I can overclock the 810 if needed. I will be getting an Intel motherboard and I5 or I7 based system later. I'm just waiting for the dust to settle. Its not clear which boards do VT-D. Even on the Intel motherboards this information is...
- robmurphy
- Post #4
- Jul 16, 2012
- Forum: CPUs and Overclocking
R
Upgrade CPU from Phenom 810 to 960T or 965

Anyone have any thoughts on the above upgrade. The reason for upgrading now is that in another few weeks or so I will not be able to upgrade. The PC runs genuine Win 7 Pro and Linux The mother board is a Gigabyte one with the 790 chipset and is compatible with the 960T and the 965. Power...
- robmurphy
- Thread
- Jul 15, 2012
- Replies: 25
- Forum: CPUs and Overclocking
R
understanding wireshark output

Tracert and ping use ICMP. Many routers and hosts on the internet block ICMP. Other routers and hosts just do not reply. Its not unusual for a tracert on the internet to not report on the last few steps in the path. Rob.
- robmurphy
- Post #2
- Jul 13, 2012
- Forum: Networking
R
Warning for users of Cisco SMB RV082 V3

The support for these routers is not TAC. The support is provided by another company, i.e. not Cisco. I'm not joking when I say I have emailed Cisco saying that they should get rid of the company providing the support if they value the reputation of their SMB products. To be honest I'm...
- robmurphy
- Post #16
- Jul 12, 2012
- Forum: Networking
R
dsl started cutting out frequently a week ago

On noisy lines I have had to go up to 18dB. This usualy shows as errors on the line. You may need to check with the DSL provider. I have connections with 6dB that are stable. They only drop when engineering work is done at night. Often stability is down to to the line management used (DLM)...
- robmurphy
- Post #8
- Jul 12, 2012
- Forum: Networking
R
dsl started cutting out frequently a week ago

The up link SNR is about right. The downlink is very high. It looks like your on ADSL not ADSL2+. Given your low line loss ADSL2+ would give a big increase in downlink (more than 50%), and a good increase in uplink. Rob
- robmurphy
- Post #5
- Jul 12, 2012
- Forum: Networking
R
Warning for users of Cisco SMB RV082 V3

I see Cisco has release a new firmware for these routers. The new firmware is version 4.2.1.02. This still has the problem with SIP messages. Check the release note. Cisco claim they have fixed this, but they emailed me about it while I was on holiday, so was not able to dowload the beta...
- robmurphy
- Post #14
- Jul 12, 2012
- Forum: Networking
R
dsl started cutting out frequently a week ago

Where are you based. If in the UK who provides the DSL service? Rob.
- robmurphy
- Post #3
- Jul 12, 2012
- Forum: Networking
R
Two internet connections running concurrently?

Its relatively simple to have a router configured with dual WAN interfaces. Doing this on the PC will not be so simple. The main problem you will have is using WIFI as the WAN interface. Its 99% certain this will already have been through NAT, and you will need a unit that can take the...
- robmurphy
- Post #2
- Jul 1, 2012
- Forum: Networking
R
best pc for a network analyzer

When you download wireshark you will get dumpcap as well. This is true for linux and windows. I would stick to the ring buffer. You will not miss any traffic because you are using a ring buffer. For one of my captures I use 500 5MB files. That's alot of capture. Dumpcap will put the date and...
- robmurphy
- Post #5
- Jun 27, 2012
- Forum: Networking
R
best pc for a network analyzer

This will depend on your budget. If you want to run wireshark on the device that is capturing you will need more than an ARM based system. At least a P4. Memory is also a limiting factor. 512 MB will run out very quickly. I have setup capture on all most of the networks I have worked on...
- robmurphy
- Post #2
- Jun 26, 2012
- Forum: Networking
R
Warning for users of Cisco SMB RV082 V3

I'm on holiday at the moment. I do not think the firmware I use is available for download. I'll be testing a new firmware with a "fix" over the next few weeks. I'm not overly confident in the fix as the people I have been dealing with thought they could not re-create the problem. It was only...
- robmurphy
- Post #13
- Jun 12, 2012
- Forum: Networking
R
Buying a Bunch of Switches (HP vs. Cisco vs. Netgear and managed vs. "smart")

I'm not sure what switch you mean. SB300? I do not use the smart port functionality. I prefer to set the VLAN manually. I did look at smart ports but it did not offer what I needed. We have SF300-24P (POE FE ports) deployed with many customers and have had no issues with them. We also...
- robmurphy
- Post #12
- May 19, 2012
- Forum: Networking
R
Buying a Bunch of Switches (HP vs. Cisco vs. Netgear and managed vs. "smart")

Cisco SMB switches are much better these days. They are not aimed at installs for 300 users though. One thing to consider is that the SF300 and SG300 range wipe the floor with any Netgear. They are better than the equivelant procurve, and they have the same warranty. Tolly did a comparison...
- robmurphy
- Post #10
- May 18, 2012
- Forum: Networking
R
Properly isolating subnets

Some of the newer Draytek Vigors will allow you to have multiple subnets on the LAN ports. The LAN ports can be separated using the VLAN config on the router so the network connected to port 1 has no connection to ports 2 & 3, but can connect to the network on Port 4. So you could have 3...
- robmurphy
- Post #4
- May 10, 2012
- Forum: Networking
R
VLAN question

Please remember that any 2000/XP/VISTA/WIN 7 machines will not work with tagged traffic. This means you will need to configure the ports on you edge switches so that the traffic for the above machines in untagged. This means the port will be an access mode port. This also means the ports will...
- robmurphy
- Post #5
- Apr 29, 2012
- Forum: Networking
R
VLAN question

I think it would be clearer if you outlined what you want to do. Do any of the switches have both networks on them? If you just want to split the switch so that part of the switch has the 192.168.x.x network and the other has the 10.0.0.x you can just use a port based VLAN. The ports are...
- robmurphy
- Post #3
- Apr 29, 2012
- Forum: Networking
R
Making a Linux Router/firewall/proxy from a Dell Poweredge 1950 - need help

Shorewall is a utility to help setup the iptables. As it says its very powerfull but not helpfull. I do not know what distribution you are running but with centos routing is disabled by default. I have been trying to do something similar to what you are doing, but have not made much...
- robmurphy
- Post #4
- Apr 9, 2012
- Forum: Networking
R
Help me pick out some new switches

If you are tight budget checkout the Cisco SMB 300 range. The range includes gigbit switches They are as good or better than HP or Netgear switches at similar prices. I do think they are stackable though. Do make sure they have the latest firmware thoug. Despite what some here will say these...
- robmurphy
- Post #14
- Mar 17, 2012
- Forum: Networking
R
Any setup recomenations for a VPN to a small office.

The connection will be over ADSL2+. We have had a VPN running ovet one of these beteeen a Co ADSL2+. If these drop its usualy very early in the moTrning due to work on the local exchange. We have had a VPN running over one these between an RV082 V3 and a Cisco ASA.This was used for an RDP...
- robmurphy
- Post #3
- Mar 3, 2012
- Forum: Networking
R
Any setup recomenations for a VPN to a small office.

We have had some security problems recently. One approach would be to route all traffic to/from the office through a VPN. I'm worried about this as the cheaper VPN solutions are reported to drop after a few hours. There will be background traffic so the longest period without any packets...
- robmurphy
- Thread
- Mar 3, 2012
- Replies: 2
- Forum: Networking

RESOURCES

Top Bottom