10 Mb's half duplex on 1840

Router is a Cisco 1840 Series.
Our ISP controls the router, The router is set to 10 Mb's half
duplex. Is this a common thing for the routers to come from the ISP's
configured like this? If so, is there some reason why they do this?
The half duplex setting really puzzles me. Why wouldn't it be set at
full duplex?I'm wondering if the reasoning is, well it collapses
down to a T1 which is running at 1.5 Mb's, so 10 Mb's is fast enough,
why run at 100 Mb's.
Hi,
Because half duplex will work in just about all situations. If it's set to full duplex and the other device is a hub or a device that doesn't support full duplex then you'd have no connectivity.
So can set full duplex with 100 Mbps at both the end side in coordination with your ISP.
Hope to Help !!
Ganesh.H
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FaceTime audio half duplex / doesn't work simultaneously

I gave my parents a new iPad Air for Christmas. Note: They are 'older' and have a lot of trouble operating electronic devices. Before sending it to them I did check for recent updates, set up their email and contacts, installed some apps that I find useful and uploaded some photos. Otherwise it's a fresh unit right out of the box.
Yesterday we tried facetime with them. The video worked as it should. The audio seemed to be in a 'half duplex' mode on our device. Meaning, they could hear us perfectly and normally on the iPad. We could only hear them when we were perfectly quiet. Any sounds or talking on our end would mute their transmission during and about 1 second after speaking.
We tried multiple calls. (I called them and then they called me). We tried an iphone 5 and a MacBook, the problem was consistant in all cases. During one of our calls on the mac, my brother placed a facetime call to my phone and his connection worked perfectly, while my parent's connection continued to have the issue.
I sent them the following instructions, in hopes that it may fix the issue, but I'm doubtful. I don't have an iPad handy (only iphones and the mac in our house) so there may be some settings that are present on the iPad and not on the iphone that they should try. Any and all help would be appreciated! They live on Kauai, HI so if there are any places there that would be helpful that they could visit, I would appreciate the recommendation.
Go into settings, scroll down until you see facetime. Select it. There will be some settings for facetime. One simply says facetime and there is a small green slider button next to it. Touch the button. It should slide and turn white. This disables facetime.
Go to settings, then general, then software update. It should say "checking updates" and then will either display your version (7.0.4 ?) OR it will say there is a new update and you can download it. If so, download/install. (Should be a button asking and just hit yes or ok).
Next, do a network reset:
Go to settings, general, scroll down to "reset". Select reset and then select "reset network settings". It will ask if you want to do this and yes, you want to do it.
Next, After all this is done, reboot the ipad. This is done by pressing and holding the top (power/sleep) button and the home button down at the same time. Hold it for 30-seconds maybe longer until the screen goes black and then the apple logo appears. Then let go.
(If you hold just the upper button for 5 seconds a red slider will appear to allow you to turn off the ipad. For a reset just ignore that and keep holding down the buttons).
Once it reboots, add yourself back to your network. It may ask on its own, but if not :
Go to settings, then wi-fi. Select your network and enter your password.
Last, go into settings, general, facetime and turn it back on by touching the white slider button. It should turn green.
I found two other cases that sounded like mine:
https://discussions.apple.com/message/22808569#22808569
https://discussions.apple.com/message/22705969?searchText=Facetime%20duplex#2270 5969

My parents called apple tech support. I'm not exactly sure what they did, but I think they just rebooted the iPad again, as done previously. It seems to be working better now, although it does still cut out now and then from sounds on my end of the line.
Another thing that seems to have helped, I determined that my parents had left it in the original plastic packaging and then crammed it into the case I gave them, which may have slightly muffled their microphones.
Anyway between these two things it is working better. We can speak on this end and still hear them talking. But now and then it still cuts out.

Unable to use Auto setting or 100BaseTx in either full or half duplex!

Hi here is the issue, I have a small home network of three desktops, one laptop (wireless) and two game consoles with a WRTP54G router and cable modem. I have noticed that if I try to change the NIC setting on any device to either Auto or 100BaseTx in either full or half duplex the connection drops. The pc will say network unplugged, the minute I change it back to10BaseT in either full or half duplex it comes right back up! Before anyone asks yes my NIC's are 100BaseTx compatable. I have made sure all drivers are up to date. Has anyone had this issue? I would like to use 100Base Tx in Full Duplex! Any help would be appreciated!

hi. the auto sense feature of the router is not working anymore. i dont know if a firmware upgrade will help, but you can give it a shot.

NIC only works at 10 Mbps/Half Duplex

Ever since I got this MOBO (almost 1 year ago), I have not been able to connect faster than 10 Mbps/Half Duplex with my ADSL modem. Any attempt to change speed will result in Windows indicating tha the cable is unpluged (Auto mode does not work either). I've updated BIOS, NIC drivers, I've installed WinXP (and re-installed) with and without SP1 and SP2. I've also changed cables with no luck.
I got an external NIC from a friend and could connect at 100 Mbps/Full Duplex so the problem is NOT on the modem side.
System info shows the internal NIC shares IRQ 18 with a USB controller wich I uninstalled just to see if it would make a difference. Same results.
I've just installed the latest drivers from INTEL and I'm still getting the same problem.
Any ideas?
Help will be greatly appreciated.
Abraham

Don't know how to fix this but I had the same problem when I was connected directly to my cable modem. I eventually got it to run manually at 10Mbs-full duplex and didn't worry about it further since that's faster than actual transfer speeds from my ISP anyway.
I then configured a wireless network using a Linksys router and noticed that my NIC now automatically connects at 100Mbs-full dupex as it should.
If you feel this limiting your actual transfer speeds(it wasn't in my case) you might consider purchasing an inexpensive router. This will also give you the benefit of having a hardware firewall.

Solaris 8 on a Sun Fire v480 (full vs half duplex)

Hi All
I've installled Solaris 8 on a Sun Fire v480.
Now, when I boot I get the following (via serial A/LOM):
{2} ok boot -r
Boot device: /pci@9,600000/SUNW,qlc@2/fp@0,0/disk@w2100002037cfdf9d,0:a File and args: -r
SunOS Release 5.8 Version Generic_108528-13 64-bit
Copyright 1983-2001 Sun Microsystems, Inc. All rights reserved.
configuring IPv4 interfaces: ce0.
Hostname: abcdef
WARNING: ce0: fault detected external to device; service degraded
WARNING: ce0: xcvr addr:0x01 - link down
Configuring /dev and /devices
NOTICE: ce0: fault cleared external to device; service available
NOTICE: ce0: xcvr addr:0x01 - link up 100 Mbps half duplex
Configuring the /dev directory (compatibility devices)
The system is coming up. Please wait.
checking ufs filesystems
/dev/rdsk/c1t0d0s5: is clean.
/dev/rdsk/c1t0d0s7: is clean.
starting rpc services: rpcbind done.
Setting netmask of ce0 to 255.255.224.0
Setting default IPv4 interface for multicast: add net 224.0/4: gateway abcdef
syslog service starting.
Print services started.
volume management starting.
The system is ready.
abcdef console login:Dec 22 11:01:34 abcdef picld[70]: Device PS1 AC UNAVAILABLE
Dec 22 11:01:35 abcdef picld[70]: FSP_GEN_FAULT_LED has turned ON: 1 failed device(s)
abcdef console login:
My question is what is going on. I see 2 things:
1)
NOTICE: ce0: fault cleared external to device; service available
NOTICE: ce0: xcvr addr:0x01 - link up 100 Mbps half duplex
what does the first line means and why half duplex and not full
2) FSP_GEN_FAULT_LED has turned ON......
hmmm, what does this mean ?
Any suggestions to help me untangle those messages ?
Thanks a lot in advance
Luca

Hi,How to set my link up in solaris 10 ?
I dont know want happend to my machine solaris v440 it suddenly disconnected from n/w and finally i came to know that is a problem with NIC card..i din't find any light's glowing back side of the machine at NIC card.
can any one help me in this pls how can i proceed furture for getting my NIC back?
and i have excuted few commands
#ndd -set /dev/ce instance 0
#ndd -set /dev/ce adv_1000fdx_cap 1
#ndd -set /dev/ce adv_autoneg_cap 0
I have got dladm show-dev is
ce0 link: unknown speed: 1000 Mbps duplex: full
ce1 link: unknown speed: 0 Mbps duplex: unknown
I dont understand that why my link is showing still unknown ...any help..

HT203585 a FaceTime half duplex issue with my Mac--OS 10.10.2

I am having a half duplex problem with my Mac---OS 10.10.2
That is, when the party I FaceTime with is talking, they cannot hear me.
I can hear then other party when we both talk---it happens whether or not
I initiate the call or the other party does. It doesn't happen with my iPhone
on the same home wifi network. And it happens on the Mac when
the iPhone FaceTime is turned off too.

You can use both.:)
* getfirefox.com

Why wifi is called half duplex

In a tutorial video i have found that wiifi is called half duplex. why it is so called?
Posted by WebUser Poristhan Prince from Cisco Support Community App

This is because a wireless client & AP cannot communicate at the same time. If AP transmit then others should listen & If a client transmitt others should listen.
That's why it call half duplex. Watch this video for better understanding how it works (you require to register ciscolive365.com first, it is free)
https://www.ciscolive.com/online/connect/sessionDetail.ww?SESSION_ID=8197&backBtn=true
HTH
Rasika
*** Pls rate all useful responses ****

Half duplex or full duplex configuration for MDS9124 management port?

Hi All,
Is it possible to set the management port of mds 9124 about half or full duplex configuration?
I want to correct following error:
Jun 13 10:27:20.799 GMT: %CDP-4-DUPLEX_MISMATCH: duplex mismatch discovered on GigabitEthernet4/18 (not half duplex), with mtw1pc02bs0(FOX1450G8QG) mgmt0 (half duplex).
it seems mds 9124 set his port to half duplex.
Dennis

You may want to check this thread :
https://supportforums.cisco.com/thread/2059109
Else try the following :
switch# config terminal
switch(config)#
switch(config)# interface mgmt0
switch(config-if)# switchport duplex full
switch(config)# exit
switch#
switch# copy running-config startup-config
Also, I would suggest you check what the counterpart of your MDS switch mgmt interface is set to (i.e. is it set to autoneg, then try setting it to fix speed/duplex or the other way around).

Simple TCP chat application half duplex not working for me

I m having a problem in TCP application working half duplex
My friend runs client program who is in near by city and i run the server program in my system
Let my ip address is 116.x.y.z
My server program is
import java.net.*;
     import java.io.*;
     public class tcpserver
         public static void main(String args[]) throws IOException
          ServerSocket s1=null;
          try
             s1=new ServerSocket(98);
          catch(IOException e)
             System.err.println("Could not find port 98");
             System.exit(1);
          Socket c=null;
          try
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             System.out.println("Connection from"+c);
                                  catch(IOException e)
             System.out.println("Accept failed");
             System.exit(1);
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          BufferedReader in=new BufferedReader(new InputStreamReader(System.in));
          System.out.println("I am ready,type now");
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          while(l!=null)
             out.println(l);
          out.close();
          in.close();
          c.close();
          s1.close();
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import java.net.*;
     import java.io.*;
     public class tcpclient
         public static void main(String arg[]) throws IOException
          Socket s=null;
          BufferedReader b=null;
          try
             s=new Socket(InetAddress.getByName("116.x.y.z"),98);
             b=new BufferedReader(new InputStreamReader(s.getInputStream()));
          catch(UnknownHostException u)
             System.err.println("I dont know host");
             System.exit(0);
          String inp;
          while((inp=b.readLine())!=null)
             System.out.println(inp);
             break;
          b.close();
          s.close();
     }Important Note: When i run this program specifying within my system its working ( i mean running the program in two different windows(terminals) its working for me)
When i give the client program to my friend its getting compiling for him but not running for him
Its showing him unknownhost exception and main method not found like this.
Please correct the above code or else just what kind of strategy we should follow in order to get rid of this problem
When i normally run this program in my system
the output when i run in my own system is
Output for running tcpserver.java
~\JDK2~1.0\bin>java tcpserver
Connection fromSocket[addr=/116.x.y.z,port=1930,localport=98] // in output i edit the ip address text
I am ready,type now
this is test text
Output for running tcpclient.java
~\JDK2~1.0\bin>java tcpclient
this is test text
My problem is its working in my system when it exceeds out the output is not available for me
Help me Please !!!

          String l=in.readLine();
          while(l!=null)
          out.println(l);
          }That will print the same thing forever. Make it the same as the loop in the client.
Important Note: When i run this program specifying within my system its working ( i mean running the program in two different windows(terminals) its working for me)Looping forever might be what you call 'working'. I don't.
Its showing him unknownhost exception and main method not found like this.Change this:
new Socket(InetAddress.getByName("116.x.y.z"),98)to this:
new Socket("116.x.y.z",98)although your friend may then run into connectivity problems ...

Allen Bradley KF-2 half duplex question

Has anyone used an Allen Bradley KF-2 DH+ communication interface with Lookout? The KF-2 connects to the SLC5/04 DH+ port and converts the DH+ to DF-1. My proccess can see the SLC5/04 in half duplex mode when I connect direct to the DF-1 port. When I try to connect through the KF-2 (set up for DF-1 half duplex), I get the Error "STS error 10: Illegal command or format" message. I know the KF-2 is set up OK, I can talk to the SLC5/04 with RS Logix in half duplex.

Hi,How to set my link up in solaris 10 ?
I dont know want happend to my machine solaris v440 it suddenly disconnected from n/w and finally i came to know that is a problem with NIC card..i din't find any light's glowing back side of the machine at NIC card.
can any one help me in this pls how can i proceed furture for getting my NIC back?
and i have excuted few commands
#ndd -set /dev/ce instance 0
#ndd -set /dev/ce adv_1000fdx_cap 1
#ndd -set /dev/ce adv_autoneg_cap 0
I have got dladm show-dev is
ce0 link: unknown speed: 1000 Mbps duplex: full
ce1 link: unknown speed: 0 Mbps duplex: unknown
I dont understand that why my link is showing still unknown ...any help..

Loopback in Half Duplex

?Half-duplex Ethernet uses a loopback circuit to detect collisions? Is this mean I need to configure a loopback interface to make collision detection work? If yes, where to set that loopback interface? On the switch? Or host? Actually, I normally don?t need to create loopback interface when I plug my computer with hub. How this works? I just don?t understand that statement.
1.12

You do not need to create any loopback interface. The book you are reading is explaining the technology in how a switch detects that there is a collision. This is a hardware mechanism in switches and we do not have to configure anything for this

Forced Full Duplex changes to Half Duplex (no mismatch errors)

Guys,
I am going through a very weird situation and wondered if any of you had any ideas on how I could troubleshoot this issue.
I am running a 2960 Cisco, which has a single mode fiber cable which is connected to multiple rstp switches designed by a mining technology company.
The fiber port which connects these switches has "duplex full" written into its configuration. However, after a random amount of time, anywhere from 1 hour to 24 hours, the port is changes to operate in half duplex. This is found by doing a show interfaces status.
At no time whatsoever is there any duplex mismatch errors.
Once i notice that the port is actually operating in half duplex mode, i log into the port, do a "duplex half" then "duplex full".. the port goes back into full duplex for another 1-24 hour period.
Any ideas on why this port keeps jumping into half duplex operation?   I really need this port to run in full duplex and cannot understand why the port would go into half duplex operation when the end devices should support full duplex.
Again, i never get any duplex mismatch errors.
I appreciate any troubleshooting tips you can provide.

MSTswitchOVCC#sh version
Cisco IOS Software, C2960S Software (C2960S-UNIVERSALK9-M), Version 12.2(53)SE2, RELEASE SOFTWARE (fc3)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2010 by Cisco Systems, Inc.
Compiled Wed 21-Apr-10 06:08 by prod_rel_team
Image text-base: 0x00003000, data-base: 0x01B00000
ROM: Bootstrap program is Alpha board boot loader
BOOTLDR: C2960S Boot Loader (C2960S-HBOOT-M) Version 12.2(53r)SE, RELEASE SOFTWARE (fc3)
MSTswitchOVCC uptime is 1 week, 6 days, 37 minutes
System returned to ROM by power-on
System image file is "flash:/c2960s-universalk9-mz.122-53.SE2/c2960s-universalk9-mz.122-53.SE2.bin"
This product contains cryptographic features and is subject to United
States and local country laws governing import, export, transfer and
use. Delivery of Cisco cryptographic products does not imply
third-party authority to import, export, distribute or use encryption.
Importers, exporters, distributors and users are responsible for
compliance with U.S. and local country laws. By using this product you
agree to comply with applicable laws and regulations. If you are unable
to comply with U.S. and local laws, return this product immediately.
A summary of U.S. laws governing Cisco cryptographic products may be found at:
http://www.cisco.com/wwl/export/crypto/tool/stqrg.html
If you require further assistance please contact us by sending email to
[email protected].
cisco WS-C2960S-24TS-L (PowerPC) processor (revision B0) with 131072K bytes of memory.
Processor board ID FOC1435W6KX
Last reset from power-on
4 Virtual Ethernet interfaces
1 FastEthernet interface
28 Gigabit Ethernet interfaces
The password-recovery mechanism is enabled.
512K bytes of flash-simulated non-volatile configuration memory.
Base ethernet MAC Address       : AC:A0:16:F3:EF:00
Motherboard assembly number     : 73-11910-06
Power supply part number        : 341-0328-01
Motherboard serial number       : FOC14354WTE
Power supply serial number      : LIT142210AX
Model revision number           : B0
Motherboard revision number     : A0
Model number                    : WS-C2960S-24TS-L
Daughterboard assembly number   : 73-11933-04
Daughterboard serial number     : FOC1435437G
System serial number            : FOC1435W6KX
Top Assembly Part Number        : 800-30954-02
Top Assembly Revision Number    : A0
Version ID                      : V02
CLEI Code Number                : COMGG00ARB
Daughterboard revision number   : A0
Hardware Board Revision Number : 0x01
Switch Ports Model              SW Version            SW Image
*    1 28    WS-C2960S-24TS-L   12.2(53)SE2           C2960S-UNIVERSALK9-M
Configuration register is 0xF
MSTswitchOVCC#

GLC-SX-MM auto detecting as half duplex

I have a 3945 router with a GLC-SX-MM connected to a Canoga 9145 with a 5 meter patch cable going to AT&T as a 100Mb Metro-E
Our performance is poor measuring about 4Mb up and 15Mb down. I have tried various test sites.
A show interface is showing: Half Duplex, 1Gbps, media type is SX
We are seeing a lot of output errors and TCP reassembly queue overflows
If I force the interface to full duplex I stop getting output errors and queue overflows but start getting interface resets. My performance also goes sub 1Mb
The ISP confirms their interface on the Canoga is properly configured. We have also replaced the patch cable.
Does anyone have any thoughts on possible causes?
Gary
http://bytesolutions.com

You're using a 1 Gbps interface and your SP is provisioning a 100 Mbps circuit? That doesn't make sense. Depending on your equipment, you should be using something like the GLC-FE-100FX=, a 100 Mbps SFP. (See http://www.cisco.com/en/US/customer/products/hw/modules/ps5455/products_device_support_tables_list.html )
Otherwise where is the buffering and queuing take place - in the Canoga? From its application guide, I believe it is intended to be used with the fiber on the provider side and the subscriber side is copper. Your post seems to describe the reverse setup.

Half Duplex/100M problem on 2960 switch with GLC-GE-100FX

We have a 2960-24TC switch with GLC-GE-100FX SFP interface converter. We connected the switch to another switch through fiber, one end was GLC-GE-100FX and the other end was a 100/FULL ATI media converter. Both switches could talk to each other. The problem was the GLC-GE-100FX interface running at 100M/half duplex status and we couldn't change the port configuration. Is there a way to fix this problem? Your help would be much appreciated.

Using show interface command. It shows half duplex. It's a new design on Cisco 2960-24TC switches, the Giga uplink ports are dual purposed. When I plugged GLC-GE-100FX SFP interface converter and connected it to a media converter, it showed half duplex. There's no way I could change the speed and duplex under that configuration.

1 wire half duplex

Hi, I'm new to this forum and NI/Labview,
Is there a NI cDAQ module that I can purchase for configuring in 1 wire half duplex mode as developed by Maxim. (not RS485 2 wire half duplex)
I could probably achieve this with a tri-state DIO module, but not sure if there is one?
or RS232 module with tri-state capability?

Hi Sparkeyx,
There are a number of NI DAQ devices which support Tri-State DIO. This information can be found in the article below:
http://digital.ni.com/public.nsf/allkb/09B559BE292C75DB8625698500640E0A
Also there is a community example in which the Maxim Integrated 1-wire protocol has been implemented usinf the NI cRIO which you might find useful:
https://decibel.ni.com/content/docs/DOC-24136
Thanks and Regards,
Supreeth.K
Applications Engineer
NIUK

10 Mb's half duplex on 1840

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