Cisco :: Padding Bytes At L2 Layer In Receiving Station

Mar 28, 2013

I am blocked with the below doubt for my issue resolution. When a ethernet frame for eg:ARP Packet of minimum length (64 bytes) is received at the end station, will the L2 layer remove both FCS and extra padding bytes(18 padding bytes for ARP)? Or removal of the padding bytes is dependent on the implementation?

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Receiving Way Too Many Bytes?

Feb 12, 2011

For the last 3 weeks or so (right around the time I upgraded to IE8), my computer has been receiving a ridiculous number of bytes compared to what it sends.Within 5-10 minutes of logging on (I still use dialup), a check on the status shows around 100,000 bytes sent and over 2,000,000 received.I've been online for around 40 minutes, and it currently shows 650,000 sent (23% compression rate) and over 5,000,000 received (4% compression rate).Of course, the browser starts lagging and freezing after a while, which I assume is from the large number of bytes being received.

At the same time, there's a noticeable lag when I try to run programs, even when offline. For example,I click on my ISP connection and nothing happens for 5-6 seconds, then the dialog box appears. This is something that's never happened before. I'm running XP Home and no one else has access to my computer.I'm using the standard Windows firewall.I've run my AV and spyware programs multiple times (nothing found), cleaned my temporary files and cookies, even adjusted the FIFO buffers (the last thing I tried was turning the buffers off). I've been running Disk Cleanup everyday (which lags and runs slower than ever before), but it doesn't solve anything.I don't know how to adjust the compression rate for bytes received to see if that works.

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Constant Sending And Receiving Bytes

Jul 28, 2011

When i look at the network wirless connection status something is constantly sending and receiving Bytes and lots of them.the modem gets warm from all of the activity.

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Cisco Switching/Routing :: Sg300 And SLM2024 VLAN As Layer 2 And Layer 3 Switches Connection

Mar 18, 2012

I want to setup VLAN with the switches SG300 and SLM2024. What is the suggestion to connect these 2 switches. We have the Juniper net screen.

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Cisco Infrastructure :: Stacking Catalyst 3750 Layer 2 And Layer 3

Nov 15, 2011

I have a question if I Stack a Catalyst 3750 L3 with a Catalyst just L2, will we able to use all L3 capabilities?

Switches are  


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Cisco VPN :: ASA 5510 Don't Have Bytes Rx

Jan 2, 2013

I have a problem with my vpn between two ASAs, I review the running config of two devices, but I couldnt see anything out of normal.As you can see in the image the VPN is up, but in the ASA 5510 I don't have Bytes Rx (ZERO), I tried to config again two ASAs but I have the same trouble.

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0 Bytes Of Free Space On CD-ROM?

Oct 22, 2012

Why do i have 0 bytes of free space on my cd rom??

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Sent And Received Bytes Increasing When Idle?

Jan 20, 2011

When i check the status of my Internet Connection I notice that the sent and received bytes keeps increasing. I'm sure there are no downloads taking place that I'm aware of. No torrent clients, no antivirus nothing. I checked my PC for malware but that didn't work. As a result of this, i keep getting high pings in online games and can't even watch videos in youtube anymore. like, some software to monitor all the programs that use the itnernet connection without my knowledge or something??My primary concern is gaming (Call of Duty 4) so I wouldn't mind this idle downloading (whatever it is) as long as the major chunk of my internet connection is directed towards Cod4!

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Broadband :: Bytes Not Increasing In Network

Jun 7, 2012

This has been happening of late. When i check the status of my Internet Connection I notice that the sent bytes will be more than 200 and received bytes will be low as 2 to 4

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Question About Conversion From Bits To Bytes

Nov 16, 2012

I used speed test and got 50 mega bits per second. I tried re downloading tf2 and i was getting 80 kilo bytes, and I am using windows 7. Doesn't 8 mega bits equal 1 mega byte?

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Sent And Received Bytes Keeps On Increasing Even When Idle?

Jan 20, 2011

This has been happening of late. When i check the status of my connection, i notice that the "sent" and "received" bytes keeps on increasing when i'm idle. I'm pretty much sure there's no downloading of any sort in progress that I'm aware of. As a result of this, I can't watch videos in Youtube or play online games due to high ping. 

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Cisco :: Cannot Increase MTU To Support Extra Four Bytes Of VLAN Tag

Oct 22, 2012

We have an EHWIC for a 2900 router. Apparently, this card supports QinQ.. However, there is no usual MTU command. Therefore we cannot increase the MTU to support the extra four-bytes of VLAN tag. We have tried 15.2 and 15.1 code. May be the command is different. I'm about to go and do some digging elsewhere.The card is EHWIC-4ESG.

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Can't Connect To Workgroup Network 0 Bytes Received?

Jan 31, 2012

We have a new router (D Link) at offices which is fixed with LAN wall points on different places , we want to use it .I connected computers to the LAN points with regular lan cables , it gives me the alert (connected) but no bytes received .I tried to ipconfig an here's what i got :Windows IP ConfigurationEthernet adapter Local Area Connection 2[CODE]

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Cisco WAN :: 881 / Memory Allocation Of 65536 Bytes Failed From 0x81F083F4 / Alignment 16

Oct 31, 2011

We have a Cisco 881 router, which is crashing.  We have seen that the ARP cache fills up so much it causes things to crash, our phones go down..  We dont know why this however IP CEF seems to be doing it, when we disable it goes away however disabling IP CEF causes our L2TP tunnel to become inoperable also.  So why does IP CEF cause thousands of AR entries and how can we limit that!?  Below is the error, sample of the ARP cache and our config.  You will notice we also have a /31 given to us on WAN interface, this was given to us by our service provider.  This is really strange I cant find other examples on internet.
The error:

Nov  1 04:21:57.474: %SYS-2-MALLOCFAIL: Memory allocation of 65536 bytes failed from 0x81F083F4, alignment 16
 Pool: Processor  Free: 55176  Cause: Not enough free memory
 Alternate Pool: I/O  Free: 2352  Cause: Not enough free memory


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Cisco :: 5500 - Count Bytes For Some Interesting Traffic Crossing Firewall In It?

Mar 20, 2013

I need to count the bytes for some interesting traffic crossing the firewall in ASA 5500. Packet Capture is so far as I need, cause I only need the number of bytes during a long time for about 3 months (source host - destination host)
capture capin type raw-data access-list cap buffer 33554432 interface inside circular-buffer [Capturing - 33553570 bytes]
I need to get only the exactly amount of "33553570 bytes" The pcap file is not needed

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Cisco Firewall :: ASA 5520 / Crypto Errors CTM ERROR / Failed To Allocate X Bytes Of Memory

Oct 9, 2012

I am currently getting a strange error when trying to use and crypto services on our ASA 5520 (8.0.3)Initially I observed that a connected VPN had dropped.Then when I attempted to use ASDM or SSH I was blocked.
In the end I opened telnet as a test and this was successful. Syslog also shows that traffic is passing as normal.The only obvious error I can see when observing various debug traces is this;
FW02# CTM: rsa session with no priority allocated @ 0xCF1FBBA0
CTM: Session 0xCF1FBBA0 uses a nlite (Nitrox Lite) as its hardware engine
CTM: rsa context allocated for session 0xCF1FBBA0
CTM: rsa session with no priority allocated @ 0xCE7A5EA8


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Cisco :: Application Layer Service The Same As Application Layer Software?

Apr 3, 2012

I am taking an introduction class to CCNA and we are focusing on the Application Layer,and I'm having some difficulty in understanding what is an Application Layer Service. Is the Application Layer Service the same as Application Layer Software?

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LAN Disappears When Using Docking Station

Aug 19, 2012

I'm using an HP Elitebook 6930p with Windows XP and an HP EN488UT docking station. When I use the computer by itself the Network Connections shows "Local Area Connection 3 Connected Intel 83567LM Gigabit Network Connection" and I can connect to the internet. When I am in the docking station, I can also see this connection, as long as my notebok is open when I start up. However, if i start the computer with the lid closed (I just want to use the external monitor, not the notebook monitor) that network connection does not appear and I cannot connect to the intenet.


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Add 2 Repeaters To A Base Station?

Aug 23, 2012

Can I connect 2 or more wireless repeaters to the same wireless base station signal to extend wireless coverage? I.e. The base station is located in the centre of the building and the signal covers the middle but not the extreme end of the building. I would like to add a repeater on each opposite sides of the signal's reach so it covers the complete building. I can't use LAN cable and the building has different electricity supply to the 3 different part of the building so can't use the mains to carry the signal. Is this possible using wirless repeaters or do I have to use wireless bridge units to connect to the base station and then output with wireless access points attached to the bridge unit to extend the wirless signal?

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Servers :: What Is A Diskless Station In Bootup

Mar 10, 2011

what is a diskless station in networking

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Connection Between The Disk Station And The PCs / HTPC

Oct 16, 2012

if the network i'm planning on will even work so i drew a picture on my project (attached). All cables will be gigabit compatible as will be the switches. The reason i will have 2 switches is because they won't be in the same building. The uppermost switch will be physically next to the router to enable me to have gigabit connection between the DiskStation and the PCs/HTPC without having to change my router (in fact can't change it due to special firmware for my internet TV).

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Install A Wireless Network Throughout Station

May 1, 2012

We would like to install a wireless network throughout the station. Currently we have a wired network with 15 PC's and are looking at obtaining tablets for our squads and apparatus. The station is quite large and is divided by the vehicle bays.I'm thinking that we will need multiple access points throughout the station. I am familiar with setting up one wireless router but not with multiple access points.

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Buffalo Air Station WHR-G300N Default IP

Feb 28, 2012

I have the Air Station WHR-G300N. I just moved here from CA, I was on Verizon and now trying to use it on my girlfriend Cox system I can't get it to operate correctly.

Her PC system stopped having internet connection after about 2 weeks(running on the router) and going with Cox's reboot procedure of eliminating the router it can back up and seems to work fine as soon as I hook it back to the modem it stops.

I have unplugged all cables waited 30 seconds on both systems a couple of times. The lights are on the modem and the router.

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AAA/Identity/Nac :: ACS 5.0 On VMware Work Station 7

May 18, 2012

I am trying to install ACS 5.0 on workstation, however once the install finsihes it reboots and I enter the Linux bash command line rather than the Cisco CLI.
Note - this is now fixed. I followed the steps here to install ACS 5.0 on VMware Workstation 7: url...

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Cisco :: Command That Can Show Which Station Consume Bandwidth

Dec 7, 2012

i have 10 stations, and i think one of them generated allot of traffic.maybe a virus sending there a command that can show my which station consume bandwidth?

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Cisco AAA/Identity/Nac :: ACS 5.3 Auth Report Called-Station-ID

Jun 24, 2012

In ACS 5.3 radius authentication report I want to show the called-station-id attribute. (this was appearning on failed and passed auth in ACS 4.2). The value of called-station-id appears in the details. However, I want it to appear as a column with the report.

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Cisco Routers :: Connect From A Linux Station To RV082

Oct 6, 2010

I want to connect from a Linux station to RV082, is it possible? What software can I use and with what configuration?

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D-Link DIR-655 :: Possible To Set Up As Wireless Base Station For Any Router

May 20, 2011

I was wondering if it is at all possible to set up a DIR-655 as a wireless base station for any router (specifically a netgear wrg614 v10). I've read that the DIR-655 can be set up as an access point, but with my current situation it's not currently possible.If this is not compatible with this specific netgear router, is there any other solution besides having to purchase a dedicated access point?

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Dell :: Latitude D820 Network In Docking Station

Oct 26, 2011

I have a Latitude D820, Windows XP, SP3.   At my office I have a regular docking station but at home I have a D/Dock docking station.  When I dock the 820 at home the Broadcomm network card works flawlessly.  When I dock it in the office, it will occasionally work but most of the time the link light and data light on the docking station are on solidly and XP reports that the cable is unplugged.  I have tried two different docking stations with identical results and also tested the cable by plugging it into the docking station that holds a D810. With the D810 it worked normally. 

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Cisco Wireless :: Aironet 1260 Series - Sending Station Has Left BSS

Oct 29, 2012

We have been having issues with random packet drops and or some sort of radio lockup which happens a few times a day. I have a test AP setup with a few clients only a few feet away and I see this combination of messages. Should I be seeing these clients drop off and then reconnect immediately? Granted these test clients are not passing much data but my assumption is that they would not become deauthenticated because of lack of activity? This setup is using a radius server for authentication. I tested it before with just WPA2 PSK and only had a few disconnected over a number of days, compared with many a day with the Radius.

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Cisco Wireless :: Aironet 1100 Disassociated Because Sending Station Is Leaving

Oct 9, 2012

We have 5 Cisco Aironet 1100 wireless access points and we are having huge problems in the last few days with them disconnecting some mobile barcode scanners that we have.
We have two Aironet's in the top of the factory which work fine and 3 down the bottom which keep kicking the barcode scanners off.  If we use the barcode scanners at the top of the factory they work fine, as soon as we come down to the other 3 WAPs it they keep connecting and disconnecting.
We get the following error in the Event log on the access points.Disassociated because sending station is leaving (or has left) BSS On the barcode scanners. [code]

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Wireless :: Samsung CY-WDCA7UT/ZA USB Central Station Dongle Driver?

Nov 10, 2012

Samsung CY-WDCA7UT/ZA USB Central Station Dongle driver?

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Routers / Switches :: Buffalo Link Station 3t Not Responding Due To Firewall

Feb 12, 2013

My buffalo link station 3t was giving me problems due to avg firewall blocking access to my drive. so switched it off to work . now that the drive is working but now when i click to access the drive the back ground on the desktop goes black on windows 7 its a acer laptop and the graphics are blurey.

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