Hi djh22
This link may help http://en.wikipedia.org/wiki/Point-to-Point_Protocol
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Similar Messages

Occasional problem with eth0 link down after booting

Hi,
Every so often after booting up the PC there is not any working network connection. Looking through the output of dmesg, I find "eth0 link down" messages. Not knowing a lot about networking lead me to resort to rebooting to resolve the problem, and rebooting does indeed resolve the problem. Today I discovered the post at [url http://bbs.archlinux.org/viewtopic.php?id=117728] which suggests similar behaviour.
I played around with ifconfig and initially thought I was seeing the same behaviour, but believe I was mistaken. I can't actually confirm until it happens if my new found knowledge will actually resolve the problem without rebooting.
I'd like to try and track down the source of the problem, and either file a bug report or take some other (configuration) measure, but need help tracing it.
Hardware in question is: Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168B PCI Express Gigabit Ethernet controller (rev 01)
and I'm using the testing repository in Arch. Any help appreciated.
Cheers,
James.

I have the exact same problem and I have the exact same ethernet controller/chip.
I've not looked that much why it was doing this. Maybe auto-negotiation fail for I don't know which reason, maybe something else, hard to tell. I might try to investigate this a bit more next time it does me this.
That said, what I'm doing when I'm seeing that my eth0 has no carrier, I'm doing a "ip link set eth0 down", wait a few seconds, and then a "ip link set eth0 up", and then it's usually fine. Since I'm personally using static IP addresses, I also have to re-add the default route after that, i.e. a "ip route add default via 192.168.1.1" to be able to go out of my LAN again. This will be different if you are using DHCP.

Link down on Oracle 10R2 - RAC

Dear All..
This is my first post, I have question related with RAC environment.
I setting up RAC on spesifications bellow:
- 3 HP server using intel xeon and 4G RAM each.
- Hitachi SAN
- Linux Centos 4.2
- Oracle 10g Release 2
- ASM 2 and OCFS 2
In installation steps, I found no problems. And the IP configuration used are:
# Public Network - (eth0)
172.20.141.1 linux1
172.20.141.2 linux2
172.20.141.3 linux3
# Private Interconnect - (eth1)
192.168.0.1 int-linux1
192.168.0.2 int-linux2
192.168.0.3 int-linux3
# Public Virtual IP (VIP) addresses for - (eth0)
172.20.142.1 vip-linux1
172.20.142.2 vip-linux2
172.20.142.3 vip-linux3
==========================================
Hangcheck 30 seconds, margin is 180 seconds
==========================================
[root@linux2 ~]# grep Hangcheck /var/log/messages |
tail -5
Apr 24 13:09:59 linux2 kernel: Hangcheck: starting
hangcheck timer 0.5.0 (tick is 30 seconds, margin is
180 seconds).
Apr 25 13:24:42 linux2 kernel: Hangcheck: starting
hangcheck timer 0.5.0 (tick is 30 seconds, margin is
180 seconds).
==========================================
setup O2CB_HEARTBEAT_THRESHOLD=301 pada file
/etc/sysconfig/o2cb
==========================================
But when I am trying to test the server using very hard
environment test (transactions and reporting using application
build by Delphi), just likes production ones, I found an error
occurred, eth0 : link down. The times it happen was random
(1 month 3 times - averages values).
And this is the error log.
==========================================
linux2 error log
==========================================
Apr 22 07:55:01 linux2 crond(pam_unix)[4288]: session
closed for user root
Apr 22 07:55:18 linux2 kernel: eth0: link down
Apr 22 07:55:19 linux2 kernel: eth0: link up, 100Mbps,
full-duplex, lpa 0x45E1
Apr 22 07:55:24 linux2 kernel:
(0,0):o2net_idle_timer:1330 connection to node li
nux3 num 1 at 172.20.141.3:7777 has been idle for 10
seconds, shutting it down.
Apr 22 07:55:24 linux2 kernel:
(0,0):o2net_idle_timer:1341 here are some times t
hat might help debug the situation: (tmr
1145667314.798878 now 1145667324.796791
dr 1145667314.798856 adv
1145667314.798892:1145667314.798893 func (c9943f19:505
) 1145429443.839194:1145429443.839197)
Apr 22 07:55:24 linux2 kernel:
(2248,1):o2net_set_nn_state:421 no longer connect
ed to node linux3 at 172.20.141.3:7777
Apr 22 07:55:26 linux2 kernel:
(0,0):o2net_idle_timer:1330 connection to node li
nux1 num 2 at 172.20.141.1:7777 has been idle for 10
seconds, shutting it down.
Apr 22 07:55:26 linux2 kernel:
(0,0):o2net_idle_timer:1341 here are some times t
hat might help debug the situation: (tmr
1145667316.353964 now 1145667326.352424
dr 1145667316.353945 adv
1145667316.353965:1145667316.353966 func (c9943f19:505
) 1145429355.325673:1145429355.325679)
Apr 22 07:55:26 linux2 kernel:
(2248,1):o2net_set_nn_state:421 no longer connect
ed to node linux1 at 172.20.141.1:7777
============================================
linux1 error log
============================================
Apr 22 07:55:02 linux1 crond(pam_unix)[10395]: session
closed for user root
Apr 22 07:57:58 linux1 kernel:
(2319,0):o2net_set_nn_state:421 no longer connect
ed to node linux2 at 172.20.141.2:7777
===========================================
linux3 error log
===========================================
Apr 22 07:55:03 linux3 crond(pam_unix)[14329]: session
closed for user root
Apr 22 07:56:50 linux3 kernel:
(2512,0):o2net_set_nn_state:421 no longer connect
ed to node linux2 at 172.20.141.2:7777
Any body have an advice or solution to overcome this problem.
Thanks for helping.
Best Regards,
Car Elcaro.

$cat opmn/conf/ons.config
localport=6101
remoteport=6200
loglevel=9
useocr=on
2007-02-09 13:43:16.441: [    RACG][1] [15217][1][ora.cgwdb02.ons]: Number of onsconfiguration retrieved, numcfg = 2
onscfg[0]
{node = cgwdb01, port = 6200}
Adding remote host cgwdb01:6200
onscfg[1]
{node = cgwdb02, port = 6200}
Adding remote host cgwdb02:6200
ons is not running ...
2007-02-09 13:43:16.454: [    RACG][1] [15217][1][ora.cgwdb02.ons]: clsrcexecut: env ORACLE_CONFIG_HOME=/u01/oracle/product/10.2.0/crs
2007-02-09 13:43:16.454: [    RACG][1] [15217][1][ora.cgwdb02.ons]: clsrcexecut: cmd = /u01/oracle/product/10.2.0/crs/bin/racgeut -e USRORA_DEBUG=0 540 /u01/oracle/product/10.2.0/crs/bin/onsctl ping
2007-02-09 13:43:16.454: [    RACG][1] [15217][1][ora.cgwdb02.ons]: clsrcexecut: rc = 1, time = 0.531s
2007-02-09 13:43:16.454: [    RACG][1] [15217][1][ora.cgwdb02.ons]: end for resource = ora.cgwdb02.ons, action = check, status = 1, time = 0.743s
2007-02-09 13:43:17.421: [    RACG][1] [15239][1][ora.cgwdb02.ons]: onsctl: shutting down ons daemon ...
Number of onsconfiguration retrieved, numcfg = 2
onscfg[0]
{node = cgwdb01, port = 6200}
Adding remote host cgwdb01:6200
onscfg[1]
{node = cgwdb02, port = 6200}
Adding remote host cgwdb02:6200

Srw224g4 fiber link down

Support,
Yesterday for no apparent reason the fiber link between my SRW224G4 and SLM248G went down. Luckily I have a backup SRW224 switch with a mini-GBIC. I tried both ports on the SRW224G4 switch. Neither would sync with the SLM248G switch. I moved the mini-GBIC to the SRW224 switch. This got the network back up.
Why did not SRW224G4 switch fail? I've looked through the logs and only see link down entries. Is there a way to test the switch to see why it failed? Do I need to relpace the switch? Is it still under warranty? What are my options??
Thanks,
Bill V

i've checked the datasheet for the device and the warranty period is 5 years. you already tried to use a different mini-gbic card for the device, right? i suggest that you try to swap the gbic card also to verify if that will work.

Solaris 8 says: "Link down, Cable Problem?"

I have these on my home LAN:
1. Sun Ultra 5 Solaris 8
2. Win 2000 PC
3. Win NT laptop
They are all hooked into a LinkSys Router.
The Router is hooked into my Motorala Cable Modem.
Here's the problem:
The PC and the laptop can see each other on the LAN.
The Solaris 8 is only visible on the Lan INTERMITTENTLY.
The lights on the Router for the PC and laptop are always ON.
When I reboot the Solaris box, the lights on the Router sometimes come ON, and sometimes they stay OFF. When they stay OFF, I see the message: "Link down, Cable Problem?" during reboot.
I have tried different cables, and tried various combinations of the 4 avalable ports on the back of my Router.
If I plug in the Sun box DIRECTLY into my cable modem, then I don't see the above message. (but then I don't have a LAN anymore)
Please help, I've been struggling with this for a while now.
Thanks,
Irshad Ahmed (I am relatively new to Sun)

Hi
You have not indicated if you have the router ethernet ports working
at 100Mbps or 10Mbps. Depending on this sometimes, Sun systems may
not be correctly auto-negotiating their ethernet port settings.
You may set these parameters to force Sun Ultra 5 to a 100Mbps mode or a 10Mbps mode.
For forcing it to 100Mbps, Full Duplex mode and disabling the auto-negotiation, put these entries in /etc/system:
set hme:hme_adv_autoneg_cap=0
set hme:hme_adv_100T4_cap=0
set hme:hme_adv_100fdx_cap=1
set hme:hme_adv_100hdx_cap=0
set hme:hme_adv_10fdx_cap=0
set hme:hme_adv_10hdx_cap=0
Conversely, if you want to force your Sun to work on 10Mbps, Full
duplex mode, (if your router does not support 100Mbps) in the same
/etc/system file, put the following entries :
set hme:hme_adv_autoneg_cap=0
set hme:hme_adv_100T4_cap=0
set hme:hme_adv_100fdx_cap=0
set hme:hme_adv_100hdx_cap=0
set hme:hme_adv_10fdx_cap=1
set hme:hme_adv_10hdx_cap=0
One of these should solve your problem. You need to reboot the system
after putting these entries.
You can also check the port at the OK prompt using the command
"watch-net". This test the onboard ethernet interface.
You may also apply the hme patch released by Sun that fixes many
known problems with hme ethernet driver. The patch id is 108981-03.
It is available from the site :
http://sunsolve.sun.com
HTH
Shridhar
Sun-DTS

Link down and Link Up Snmp trap C#

Hi i've configure my cisco router to receive the SNMP traps if the link goes up or down. However i found out that when i plugged out the cable i'm not receiving any link down on the network management system. Until i plugged in again the link will then show up or down state. May i know whats the reason why i can't receive the link down when i plugged out my cable?

If your router has only fa0/0 as active interface, then this would be the interface that the router would use to communicate with the network management system. However when you unplug that interface now the router has no interface that it can use to send the link down trap to the network management system.
HTH
Rick

Fibre Link Down

We have been using an Apple RAID with 8 disk (4 in each controller side) for almost 6 months, each controller in the raid is conected to a Qlogic 5600 and from there to 3 IBM servers using slicing and LUN mapping.
Suddenly since two weeks ago we have been receiving this logs AT IRREGULAR intervals:
Upper Controller 04/01/08 08:51:09 PM RAID Controller 1 Fibre Link Up
Warning Upper Controller 04/01/08 08:51:08 PM RAID Controller 1 Fibre LIP
Warning Upper Controller 04/01/08 08:48:48 PM RAID Controller 1 Fibre Link Down
And the windows server report that the SCSI disk have been disconnected, when we stop all the servers and reboot the raidfabricsservers works for 2 to 5 days and again the same messages.
Any idea of what is happenning and how to handle this ?
Humberto

+ the ports on the fibre switch should be configured right for storage/hosts:
RSCN suppression on / device scan off for hosts
and vice versa for storage
+ the logs from the FC are hidden, you can access them following the next procedure. (As explained in the [qlogic event manual|http://www.servants.co.jp/qlogic/pdf/2-259060-00_A-QLogicFCSwitchEventMassageGuideFW40.pdf]
Archiving and Downloading the Event Log
You can use the command line interface to create a file on the switch that contains
the most recent 200 entries plus the previous 1000 entries. This file can then be
downloaded to the workstation using FTP. To create and download a log file, do
the following:
1. Log into the switch through Telnet and create an archive of the event log.
The Set Log Archive command creates a file on the switch named logfile.
QLogic #> admin start
QLogic (admin) #> set log archive
2. Open an FTP session on the switch and login with the account name images
and password images. Transfer the file logfile in binary mode with the Get
command.
ftp ip_address
user:images
password: images
ftp>bin
ftp>get logfile
xxxxx bytes sent in xx secs.
ftp>quit

TTYB Error "Link Down"

There was a sudden close in the terminal connection giving link Down error .
After killing and restarting the tip connetion its giving Link Down error
tip -9600 /dev/ttyb
though the server is up (solaris 9.0 , sun fire v440)
link down
Kindly suggest the possible action to be taken for this .

Hi,
You can try Ctrl + c to stop the process or try Stop + a
to get to the Ok prompt.
I encountered the same error when I installed Solaris 2.6
on a Ultra 10.
Regards
Karen

Hme0: Link Down - cable problem?

i've a problem i've buyed an ultra 10 (used)
i've reinstalled solaris 10 01/06
when it boot the o.s. it give this error message "hme0: Link Down - cable problem?"
and network don't work.
i cannot ping my router but i've gave to my sun an ip of the same netmask (sun ip 192.168.1.88 router ip 192.168.1.1)
i've checked the cable and it's good (it work with a normal pc)
the led on the switch is on (it's green)
maybe i need some patch
how can i do?

gio,
You didn't necesarily do anything wrong.
You do not necessarily have any broken equipment.
There may just be somthing that is incomplete in the setup.
Begin by checking if your network settings were set up correctly by running:
# ifconfig -a
(it's usually best to troubleshoot while you are root user)
If the output from the ifconfig command seem to be complete, you could always think about reconfiguring the NIC all over again.
If you are not sure, then just paste the entire output results back here.
Also, use the forum search function, using keyword sys-unconfig.
Next, read the Solaris man pages for sys-unconfig.
That command will force you to repeat the setup of the connection.

Howto Link Down-Cable problem?

Hi,
I am having a Ultra Sparc 5 with a hme interface and a quad card. When the machine boots it checks at boot prom level all 5 interface and reports for all qfe interfaces "Link Down-Cable problem?". All qfe interfaces do not have a ethernet connx but I also do not want to deinstall the quad card. Is there any possibility to turn thoose "interface checks" off.
Thanks Marcus

Never mind I just figured out that thoose checks just run after the boot cdrom command.

Modem router link down in a small network when I connect any mac with OSX

With OS9 I have no problems at all the other machines are PCs, I try whith 2 diferent laptops, and 2 macmini and the internet connection throught a modem router link down inmediatly... and the modem try to connect many times automaticly, and connect for few minutes... after that being link down again... any ideas what the problem is? I think a protocol interference may cause this, but I don't know what really... thanks

Start by changing the wireless names to SMB compatible names.. ie short, no spaces and pure alphanumeric. Make sure the HP is in range of the router.
You can use the WPS setup via the utility main menu. There is no WPS button as such but apple has had to provide some way to handle this directly.
http://store.apple.com/us_smb_78313/question/answers/readonly/does-the-airport-e xtreme-support-wifi-protected-setup/Q7JJ79KC7F2DTCYJP

Cisco Prime infrastructure Change severity Switches and hubs - link down alarm

Hi, I want to change the severity of the link down alarm in the Cisco Prime Infrastructure 1.3, but in the menu Administration -> System Settings -> Severity Configuration i can not find the alarm. Some body knows where is it? o where i can change the severity of that alarm?
Thanks in advanced.

Hi Rollin and Daniel,
the first test i did changing the severity was with a new installation, with no devices added and it worked, when i did it in a Prime infrastructure with devices added it didn´t work, well, for this Prime with devices i upgraded it with the patch for 1.3 version and now it works too, the alarms is ok as the alarm severity, this is the link for the patch:
http://software.cisco.com/download/release.html?mdfid=284652876&flowid=38562&softwareid=284272933&release=1.3.0&relind=AVAILABLE&rellifecycle=&reltype=all
i hope this helps,
Regards,
Milton Tizoc.

Prime Infrastructure 2.0 Link-Down Alarm severity level

Hi,
i have been looking for a way to lower the severity level of link-down Alarms. I use the threshhold utilization feature and want to generate an alarm when CPU or Memory goes over 90%, this works fine. Problem is that when you enable "Switches and Hubs" or "Routers" category to receive alarms under: Operate -> Alarms & Events -> Email Notifications, you define only Critical alarms should generate an email and Link-down is by default Critical.
Well you figure that you should be able to change this, but i can't find anything to change the severity under: Administration -> System Settings -> Severity Configuration.
Do anyone know if this is even possible? If so please tell me how..

Hi,
Yes it is possible.
Changing Alarm Severities
You can change the severity level for newly generated alarms
Note Existing alarms remain unchanged.
To change the severity level of newly generated alarms:
Step 1 Choose Administration > System Settings .
Step 2 Choose Severity Configuration from the left sidebar menu.
Step 3 Select the check box of the alarm condition whose severity level you want to change.
Step 4 From the Configure Severity Level drop-down list, choose the new severity level ( Critical , Major , Minor , Warning , Informational , or Reset to Default ).
Step 5 Click Go, then click OK.
Check the attached screen shot ..
Thanks-
Afroz
***Ratings Encourages Contributors ***

ADF Rich client demo link down?

Is the ADF faces rich client demo link down?
http://jdevadf.oracle.com/adf-richclient-demo/faces/components/skinningKeys/index.jspx
Thanks,
Rajesh

Yes looks like it. The link is often down. You can load the war from http://www.oracle.com/technetwork/developer-tools/adf/downloads/index.html and run it in your jdev.
Timo

Link down a page by # of pixels

Is it possible to link down a page 200 pixels?
I know it's posssible to link to a certain NAME/ID element in the page but is it possible to link down a certain number of pixels?

Is this close to what you're trying to achieve?
http://alt-web.com/TEMPLATES/FixedLayout.shtml
View source in browser to see the code.
Nancy O.
Alt-Web Design & Publishing
Web | Graphics | Print | Media Specialists
http://alt-web.com/

PPP Link down

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