Port speed and Wan speed

While reading Cisco documentation, router have a specific WAN speed up to 21 Mbps etc or more depending on router. You also see port speeds of 100Mbps or 1Gbps, but why are Wan speeds limited to far less on most Cisco routers.

If a router can support, for example, 21 Mbps, you don't want to have an interface of only 10 Mbps and you'll find router with 100 Mbps interface.
Same goes with routers that can support, for example, 125 Mbps. The routers will come with 1 Gbps interface instead of 100 Mbps interface.

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What are the advantages of varying write speeds and burn speeds?

What are the advantages of varying write speeds and burn speeds?

The slower the speed, the fewer burn errors (or, in other words, you'll burn fewer "coasters"). I've always tried to burn at a slower speed, i.e. 2x - 4x. I'd rather wait a few minutes more and I've never had any burn errors.

High speed and Low Speed CAN

Hi
This is my first time to use CAN.
I have LabVIEW 2010 and LabVIEW FPGA
I have NI 3110 Dual-Core Industrial Controller with Windows OS, NI 9157, NI 9852 CAN Low Speed Module and NI 9853 CAN High Speed Module to be used to monitor the CAN messages from an ECU unit.
The connection is done as the following:
·         The High speed CAN is connected to the NI-CAN 9853 (Port 0)
·         The low speed CAN is connected to the NI-CAN 9852 (Port 0)
·         The baud rate of the 9853 is 500kbps
·         The baud rate of the 9852 is 50kbps
·         Both modules are set to “Listen Only”
·         “Module Clock” in both modules is set to 20MHz
·         CAN networks are 29-bit and 11-bit.
My consideration is to read all the messages from both modules without losing any message. Below is a picture from the block diagram on the FPGA target, is this the best way to read CAN messages from both modules? Also, could you please suggest what is the best way to read the messages on Host vi?
Unfortunately, I do not have the module right now to do some test, so that I cannot get the iteration time (“CAN Low Speed Loop” and “CAN High Speed Loop” show in the picture below), could you please tell how to calculate the iteration time needed for each loop depending on the above information.

The way that you have proposed to use the CAN module to monitor the BUS is a bad idea. We have a prebuilt driver that will do most of this work for you. You will need to download and install the NI-CAN 2.7.3 and then you will be able to use the example finder. In the example finder look for.
The example finder is accessed through the Help menu.
Jacob K || Applications Engineer || National Instruments

NAT port-forwarding and WAN side IP addresses

I have my Airport Extreme setup to forward port 21 to an FTP server on the LAN side of my network. The AE is connected via DSL to my ISP.
When a client from the WAN side connects to my server, the server's LOGS don't list the IP of the client, rather it says the client connected from my assigned WAN IP. For example (fake ip's):
Client ----> AE ----> FTP-SERVER
130.129.12.3 76.99.89.3 10.0.1.2
Log states client connected
from IP: 76.99.89.3
My previous Linksys router, with the same DSL modem and ISP, would report the client as connecting from 130.129.12.3.
Am I missing something in how I am configureing my AE? Or, is this how the AE manages port-forwarding and there's nothing I can do about it?
I used to use firewall rules to control access to the FTP server, i.e. rules set on the server. This can't be done anymore with the AE operating as it does.

Seems to me that the NAT translation in the Airport 802.11n is such that it does not use the incoming IP of clients connecting from the WAN side to a computer on the LAN side. The ingoing and outgoing packets reach their respective destinations, it is just that the AE uses some kind of non-standard routing (at least not that I am used to working with).
This is bad because it prevents the use of some forms of access controls on BSD and Linux servers on the LAN side, TCP Wrappers and iptables for example. This can create obvious security problems when WAN ports are set to forward to such a LAN client. We are already getting hit with robot-like script attacks on our server, this was a problem with our Linksys router, but with the above mentioned tools and scripts we were able to block abusive clients.
Perhaps an Apple can work on resolving this issue in a future firmware release, at least make it an option... Anyone from Apple out there?
jmj

Bus Speed and Ram Speed Question..thanks

I have recently purchased my first mac! I purchased a refurb but I noticed that the one I purchased has bus speed of 800mhz and the ram has 667mhz. (I did get a 320g hard drive vs a 250g and a 256mb graphics card vs a 128mb) The other one has bus speed of 1066mhz and ram speed has 800mhz. Am I going to notice a difference in the bus/ram speed difference or just stay with the one I purchased?
thanks

I don't think you will notice a difference. Other system factors (such as video card, system CPU clock speed, amount of RAM installed, speed of hard drive, etc.) will most likely overwhelm any noticeable difference cause by the slower bus speed.
If the price of the refurb was good, you should keep it. I have an online Apple Store refurb myself, and although I know that the latest iMacs are a bit faster, I don't see how that extra speed will be of great benefit to me. I'm much happier with the money I saved on the refurb compared to a new iMac.

Speed and WAN or LAN

My iMac is ethernet wired (Cat5) to my AEB n gigabit LAN port and the transferrate is only about 10MB/s.
I think this is very slow for a wired connection.
I've tried a Cat6 cable and it did not make any difference.
Wireless speed is about 6MB/s
My network consiste of:
internet modem ->
-> D-Link 10/100 router (DHCP server)(it shows full-duplex 100)
D-Link 10/100 router (DHCP server)->
1.-EN-> AEB(n gigabit) -> USB airdisk
2.-EN-> Senao wireless AP (b/g wireless)
AEB(n gigabit) ->
3.-> iMac (Cat5 wired to the AEB LAN port)
4.-> MacBook (wireless)
5.-> Airport Express(wireless join network)-> AV receiver (optical)
6.-> Airport Express(wireless join network)-> HP printer (USB)
All components are in the same subnet. AEB is set to 5Ghz, Senao is on 2,4 Ghz.
I think my transferspeed is slow.
Can I do something to increase the speed overall?
Can I do something to increase the speed from the iMac to the EN wired AEB with airdisk?
Would it help if I connect the iMac to the AEB WAN port instead of LAN port?
Thanks for your help.

I am pretty sure that the speed restriction is not your network.
The Air Disk itself is pretty slow at writing. - The processor in the AEBS is the weak-link. Not the USB or the network.
This article shows this pretty clearly
http://www.appleinsider.com/articles/08/04/02/exploringtime_capsule_time_machine_over_the_network_vsusb.html

Gigabit wire speed and wireless speed

I'd like to hardwire the gigabit ethernet ports on my Extreme to my TV and game console. Assuming the TV and game console support gigabit, will speeds on the gigabit wired network be inhibited by connecting older (802.11g) laptops to the 802.11n wireless network? I know that speeds are limited by the slowest device connected to the network, but don't know if that extends to wireless devices as well.
Thanks for any suggestions,
Ian

Ian,
The whole thing is pretty much a moot point if you are connecting your network to the Internet. Even "g" wireless speeds are 54 Mbps. That's probably quite a bit faster than your Internet connection speed with your provider, correct?
The Internet connection is almost always a severe "choke" point on any home network. 100 Mbps or 1000 Mbps connections won't matter much if the devices have an Internet connection, as is likely with your TV, Game Console, Computers, etc.

Mem speed and board speed confusion

Hi guys I have internet now
Thinking of upgading now to a Q6600 a MSI P35 Platinum
The board supports a bus speed 0f 1333 but only supports ram speeds of 6400&5300
I wanted to use some 8500(1066) but not sure if it's supported?
What gives?

I'm a complete noob in this field
Assuming I'll go for a Q6600 and the P35 Platinum and OC
What speed of memory would be acceptable?
Is it still best for a 1:1 or is a divider acceptable now?
Would 6400 OC to 8500?
Or should I get some 1333 and run in single channel?
I presume dual channel is still the way to go?
I will be going for 4GB.
Was looking at OCZ Reaper 8000/8500 but if 6400 would do the job......
I'm so far behind on OC'ing it's scary
Thanks in advance for your Helps

WAN speed very slow

Hi,
Have a rv130w router here and wan speed is very slow.
Router basic config and has no vpn's setup.
I see squashfs error and cpu 95 % load error.
see logfile
somenone else having this too?
regards
Dirk

Good morning
Thank you for using our forum, my name is Johnnatan I am part of the Small business Support community.
Hi Ronald, I apologize for the issues you are having, please call the Small Business Support Center to confirm if this is a bug. Please go here to find the phone number in your country:
https://www.cisco.com/en/US/support/tsd_cisco_small_business_support_center_contacts.html , you will see a telephone number list , select your region and contact us to report it.
Remember you could overload your device capacity if it has activated multiple services such as IPS, multiple tunnel, Ipsec etc. I hope you find this answer useful,
*Please mark the question as Answered or rate it so other users can benefit from it"
Greetings.
Johnnatan Rodriguez Miranda.
Cisco Network Support Engineer.

WRVS4400N Hard Set WAN port speed and duplex???

Does anyone know if there is a way to hard set the wan port speed and duplex on a WRVS4400N V2 router?
Any Help greatly appreciated..
thanks,

Michael
I believe that these statements are true.
Auto negotiation is good when both sides are configured to negotiate. When one side does not negotiate the other side should not try to negotiate.
HTH
Rick

Trouble with port forwarding, DHCP, VUZE, and downloading speed.

I am using Vuze to download things. I have a slow download speed and yellow smiley face, indicating a NAT problem. I think I need to implement a port forwarding, but that requires a static IP address. My router and security is set up such that I CANNOT connect to the internet using a manual configuration--DHCP only. However, I always have the same IP address. This is because the wireless router--a Motorola SB900--will only recognize approved computers designated by the IP address.
Can anyone advise on what to do next?

Enmnm wrote:
I am using Vuze to download things. I have a slow download speed and yellow smiley face, indicating a NAT problem.
Here are two links that will rate your connection.
http://www.speedtest.net/
http://www.pingtest.net/
You can try downloading directly from the terminal to see how fast one file downloads.
Macintosh-HD -> Applications -> Utilities -> Terminal
mac $ mkdir test
mac $ cd test
mac $ curl "http://www.apple.com" >see
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
100 11292 100 11292 0 0 22628 0 --:--:-- --:--:-- --:--:-- 62623
mac $ cat see
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-us" lang="en-US">
<head>
... clipped ...
I think I need to implement a port forwarding, but that requires a static IP address. My router and security is set up such that I CANNOT connect to the internet using a manual configuration--DHCP only.
you are dealing with two networks. There is a network between your computer and your router. There is a second network between your router and your ISP.
Port-forwarding is from your router to your computer.
http://www.portforward.com/english/routers/port_forwarding/Motorola/SBG900/Azure us.htm
However, I always have the same IP address. This is because the wireless router--a Motorola SB900--will only recognize approved computers designated by the IP address.
Can anyone advise on what to do next?
You need to set Port-forwarding between your computer and your router. You will need a fixed IP address on a your Computer. There is to ways of doing this. You can set up a static IP address on your computer. A hack would be to add 10 or 20 to your IP address that your router gives out. For example if your router gives out 192.168.1.10 you of would add 10 to the ten giving 192.168.1.20. you need to make the addition to the right most number of which in the example is ten.
The section way is . . . You can have your router a signed a fixed address based on your MAC address. ( Each Internet device has a fixed address that is called the MAC address. This is a different address than your IP address. the MAC address is assigned in the factory. )
Another hack would be to Port-forward to the number your router assigned at random. If your Computer is the only computer on the router, the number should always be the same. It is a hack because this is not guaranteed.

Nexus 2248TP port speed and duplexing

Hello Forum Team!
In order to configure the port speed and duplexing (change to 100Mbps/Full-duplex from auto mode) on a Nexus 2248TP interface, does the port needs to be down,.i.e, no link?
Thanks in advanced for your support!

Hello and thanks for reply;
I was trying to configure port speed and duplexing on a 2148. This FEX model only works at 1000Mbps as I later found out on the documentation.
Thanks again for your support.

HT5219 Do you need a Thunderbolt 2 Cable to get the speed out of a Thunderbolt 2 Port? Or is there just one kind of Thunderbolt cable, and its the Thunderbolt 2 port which determines the speed?

Do you need or is there a specific Thunderbolt 2 Cable to get the speed out of a Thunderbolt 2 Port? Or is there just one kind of Thunderbolt cable, and its the Thunderbolt 2 port which determines the speed?

Hi XChip73,
The links below will answer your questions about specific cable needs for Thunderbolt 2 and how the speed is determined.
Apple - Thunderbolt: Next-generation high-speed I/O technology.
Apple Thunderbolt cables and adapters - Apple Support
Cheers,
-Jason

79X1 Port Speed and Duplex

I've been trying to figure out how to get the Network and PCPort Speed And Duplex "actuals" from 7941 and 61s. On the 7940s and 60s this was available via the PortInformationX? URL but other than sending keys to the phone and getting a screenshot (modeinfo) I haven't been able to find the right URL/URI for the 79X1 family.
Any help will be greatly appreciated!
Thanks
LT

Hello,
as I understand it, NLP is just a basic Ethernet connectivity check used for 10BaseT (non-autonegotiate) devices, while FLP is an enhanced version of NLP, used in autonegotiation. Whenever autonegotiation is involved, FLP's are being sent. When a FLP capable device detects NLP's from a 10BaseT device, it stops sending FLP's and reverts to NLP's.
Check the following document for a detailed explanation:
Advanced Ethernet: Understanding link, auto-negotiation and auto-sense
http://inetd.com/CriticalNetworks/resources/index.html
HTH,
GP

Service outages and slow speeds

Why have I been having service outages and slow speeds for the last several weeks. I am in south central PA. (Somerset County)
Why do I have to pay Verizon for service that I do not get?

#1 Visit http://www.giganews.com/line_info.html and post up the Traceroute the page shows, if you wish. Be aware that the final hop (bottom-most line of the trace) might contain a hop with your IP address in it. Remove that line. What I'm looking for is a line that mentions "ERX" in it's name towards the end. If for some reason the trace does not complete (two lines full of Stars), keep the trace route intact.
#2 Can you provide the Transceiver Statistics from your modem?
If you don't know how to get that info:
a) What is the brand and model of your modem?
b) If you have a RJ-45 WAN port router connected to the modem: What is the brand and model of that RJ-45 WAN port router?
#3 Even If you know how to get the Transceiver Statistics from your modem and you have a RJ-45 WAN port router connected to the modem: What is the brand and model of that RJ-45 WAN port router?
If you are the original poster (OP) and your issue is solved, please remember to click the "Solution?" button so that others can more easily find it. If anyone has been helpful to you, please show your appreciation by clicking the "Kudos" button.

Port speed and Wan speed

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