Duplex Mismatch In Cisco 3750
Jun 26, 2007
I have just bought a switch Cisco 3750. However, when I plugged in the uplink. The link is set to half-duplex only (auto-negoiation).
Below is the error in the "Diagnostic Log" of the log:
03:54:52: %CDP-4-DUPLEX_MISMATCH: duplex mismatch discovered on FastEthernet1/0/18 (not full duplex), with sw6.hkg3.asianetcom.net GigabitEthernet0/21 (full duplex).
I have tried to set the port to "Full" in Cisco. But, the link drops immediately. Could anyone tell me how to fix that?
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Mar 21, 2007
What're the main differences between a 3550 and 3750? (basic 24 port models i.e.3750-TS)
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Apr 29, 2008
We are currently showing a bunch of our server as half duplex on the nic when performing the command "ethtool eth0". The switches are all set to full duplex on our network.
Every single port has duplex full and speed 100. We can't seem to figure out why specific servers are showing half duplex and some are showing full. Can anybody give any insight on this issue and perhaps where to look? I am stumped at this point.
here is an example of one showing half:
ethtool eth0
Settings for eth0:
Supported ports: [ TP ]
Supported link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Full
Supports auto-negotiation: Yes
Advertised link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Full
Advertised auto-negotiation: Yes
Speed: 100Mb/s
Duplex: Half
Port: Twisted Pair
PHYAD: 0
Transceiver: internal
Auto-negotiation: on
Supports Wake-on: umbg
Wake-on: g
Current message level: 0x00000007 (7)
Link detected: yes
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Feb 3, 2007
I got problem with collisions
I think this because of half duplex that nic does:
eth0: no autonegotiation, 100baseTx-HD, link ok
product info: vendor 00:00:20, model 32 rev 1
basic mode: autonegotiation enabled
basic status: autonegotiation complete, link ok
capabilities: 100baseTx-FD 100baseTx-HD 10baseT-FD 10baseT-HD
advertising: 100baseTx-FD 100baseTx-HD 10baseT-FD
link partner: 100baseTx-HD
Is this because of nic or switch?
what is link partner?
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With my server with in a datacenter, it starts from about 100kb/sec and then makes it way up to 260kb/sec. I am moving datacenter. So what does it mean by burstable.
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I have checked and re-checked the cert text to make sure I'm not putting in any extra whitespaces or anything. I know the cert must be somewhat valid because when I put it into WHM and click outside the cert box it automatically pulls up what account it is for (domain, username, ip).
Does anyone know what would cause this?
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Jun 16, 2009
Thought of sharing this with all.
Issue:
Php function was returning wrong time. There was a difference of 1 hour between the server time and the php time. Due to this ,most of the functions on the site were not working properly.
Fix :
For checking the php time, put the following code in a file, say time.php
Code:
<?php
$time = time();
$result = date(”Y-m-d (D) H:i:s”,$time);
echo “Current date and local time on server = $result “;
?>
Execute the php script.
Code:
[root@localhost ~]# php -a time.php
Interactive mode enabled
Current date and local time on server = 2017-01-30 (Mon) 18:04:25
To get the server time , issue the following command :
Code:
[root@localhost ~]# date
Mon Jan 30 17:04:25 IST 2017
You can see the difference of one hour between the server time and the php time.
For fixing this, you need to install the PECL timezonedb module.
Code:
[root@localhost ~]# pecl install timezonedb
At the end , you might see the following message :
==========================
Build process completed successfully
Installing ‘/usr/local/lib/php/extensions/no-debug-non-zts-20060613/timezonedb.s o’
install ok: channel://pecl.php.net/timezonedb-2009.6
configuration option “php_ini” is not set to php.ini location
You should add “extension=timezonedb.so” to php.ini
==========================
So , add the line ” extension=timezonedb.so” to the php.ini file and restart apache.
There shouldn’t be any mismatch in time now.
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modulus mismatch, key file does not match certificate. Please use the correct key file ..
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|
/
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