Duplex Settings


Login or Register for Dates, Times and to Reply

 
Thread Tools Search this Thread
Operating Systems Solaris Duplex Settings
# 1  
Duplex Settings

Hi All
I've been having a lot of errors logged on the Cisco Catalyst (4000 series) which one of my Solaris servers is patched into. I have a feeling they are duplex related, but I'm a bit stuck as to how to confirm that.

How do I:

1. Check the duplex settings on my eri0 card?
2. Set the speed and duplex settings on my eri0 card (by command line, and also for every reboot)?

OS is Solaris 5.8, Sun Fire V880.

Thanks very much!
# 2  
I know you can use ndd commands to look at qfe cards - not sure of eri cards.



# ndd -set /dev/eri instance 0
# ndd -get /dev/eri link_mode
Returned status : 1=full 0=half

See how to force duplex and speed - note again this is for hme and qfe cards - may or may not work for eri.

(if this does work for you then just build a shell script to run the commands at boot - add the script to /etc/rc2.d directory with the proper naming convention)

Last edited by RTM; 01-08-2004 at 03:11 PM..
# 3  
Found more info on sunsolve - note the following in that link:

The latest Solaris Ethernet devices and drivers (hme, qfe, eri, dmfe, ge, ce) are fully 802.3 compliant.
Even though these drivers have the ability to change auto-neg, speed and duplex settings,
Sun's preferred (and recommended) way is to auto-negotiate and not disable auto-neg capabilities!
In general, any commodity Level 2 Switch will work in a Solaris environment if it provides industry
standard features in the following areas of performance: Auto-Negotiation, Internal, Bandwidth, Buffering & Latency.

Note: Sun does not endorse nor recommend any particular makes or models of switches or hubs.
Always read the manufacturer's specifications to verify that a switch meets the requirements.

In some cases, auto-negotiation capabilities could be disabled on both sides of the link, e.g., for
troubleshooting, compatibility problems, or permanent link connections in order
to "lock" the speed and duplex of the Ethernet link.

Note: Both sides, the Solaris driver and switch (the "link partners"), must be set for the same capabilities.
Setting one side to auto-neg and forcing the other side will not work correctly.
# 4  
Thanks very much RTM.
Login or Register for Dates, Times and to Reply

Previous Thread | Next Thread
Thread Tools Search this Thread
Search this Thread:
Advanced Search

Test Your Knowledge in Computers #19
Difficulty: Easy
Vint Cerf is generally referred to as the 'Father of the Internet'.
True or False?

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Need script help for monitoring duplex settings

So I have a server I am trying to set up a script to send a Wall message notifying of my eth0 nic being set to 100 half duplex instead of 100 full duplex. I know I am trying to read from /etc/sysconfig/network/ifcfg-eth0 to pull the parameters STARTMODE=onboot BOOTPROTO=static... (6 Replies)
Discussion started by: lutador72
6 Replies

2. UNIX for Advanced & Expert Users

Help with duplex printing

I am able to use duplex printing with the -o duplex option. I am also printing landscape. It prints on the back of the page, however, I have to flip the page in order to see the other side right side up. Is there another option that will allow the duplex printing to print the right side up on front... (9 Replies)
Discussion started by: nickg
9 Replies

3. AIX

How to change Speed Duplex

How to change Speed Duplex ! How to change Speed Duplex by command chdev -P -l ent1 -a media_speed=1000_Full_Duplex How to change Speed Duplex by Smitty . smitty chgenet -> select adapter -> change Media speed etc. -> set "Apply change to DATABASE only" to yes -> Enter -> ... (0 Replies)
Discussion started by: ITHelper
0 Replies

4. Solaris

How to find half duplex or full duplex

Hi, How to find whether the server is running with half duplex or full duplex. I tried with the following command ndd -get /dev/ but am not getting any output,. Is the command correct? Also let me know how to change from half to full duplex. (1 Reply)
Discussion started by: rogerben
1 Replies

5. Solaris

Solaris 10 Speed and Duplex Settings: bge

Evening, I am attempting to change the speed and duplex settings on a single interface on a bge card on an m3000 SPARC server. Currently the settings are as follows: bge0 link: up speed: 1000 Mbps duplex: full bge1 link: up speed: 100 Mbps ... (13 Replies)
Discussion started by: brialt1
13 Replies

6. HP-UX

command to change duplex settings..

Hi Folks, I want the command to change the duplex settings of a HP-UX server. Thanks in advance. Sagar. (2 Replies)
Discussion started by: sag71155
2 Replies

7. Programming

full -duplex ?

what is meant by full duplex and half duplex? b'coz in differences b\w hub and switch ,i heard lot this duplex word so please help me (1 Reply)
Discussion started by: parvathy
1 Replies

8. UNIX for Dummies Questions & Answers

How to turn off duplex

I am using digital Unix and lpd. I have HP 4200n LaserJet TCP printer, but when I use lpr command, it always print duplex. I can turn off duplex feature at the panel of the printer, but then other Windows computer cannot print duplex. How can I set up /etc/printcap file so that it will be... (2 Replies)
Discussion started by: hiepng
2 Replies

9. UNIX for Dummies Questions & Answers

Full duplex at HUB?

Ok at the moment I have a hub whit 5 computers connected to it. It's a 10/100 NetGear hub. Ok I heard that there is some command I can run or a file I edit or something like that. But what the command/file/script/whatever does is tells you what connect speed it's connecting to the hub to. ... (4 Replies)
Discussion started by: merlin
4 Replies

10. IP Networking

duplex

Hi all, What is the difference between half duplex and full duplex? What are the advantages and disadvantages of each mode, if any? Thanks. (3 Replies)
Discussion started by: sihong
3 Replies

Featured Tech Videos