Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: Full duplex at HUB?
Top Forums UNIX for Dummies Questions & Answers Full duplex at HUB? Post 27521 by Perderabo on Tuesday 3rd of September 2002 08:41:09 AM
Old 09-03-2002
Here is some stuff from my SunOS notes. Note that other OS'es will probably handle stuff like this differently.

You can see the settings for the interface card with:
ndd -get /dev/hme link_speed
(0=10 mb and 1=100 mb)
ndd -get /dev/hme link_mode
(0=half and 1 = full)

But this doesn't mean that the hub port is in agreement. Hubs that can switch speeds and duplexes with have some way to check the port.

You want 100 mb and full-duplex. Usually the speed will be right. But often the duplex is wrong. You don't want to use autonegotiation, it fails too often.

If your interface card has the wrong settings, you can fix without a reboot by doing:

ndd -set /dev/hme instance 0
ndd -set /dev/hme adv_100T4_cap 0
ndd -set /dev/hme adv_100fdx_cap 1
ndd -set /dev/hme adv_100hdx_cap 0
ndd -set /dev/hme adv_10hdx_cap 0
ndd -set /dev/hme adv_autoneg_cap 0
(The last one will take a few seconds.)

The permanent fix so things will be cool after next reboot is to add some lines to /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
 

10 More Discussions You Might Find Interesting

1. IP Networking

Problems switching to Full Duplex

We run Compaq UNIX Tru64 5.1. After a switch got replaced our ethernet-card was magically set to half duplex! We saw, that the card was set to Autonegotiate: vmunix: ee1: Autonegotiated, 100 Mbps full duplex So we set the card with ifconfig to 100 Mbps full duplex with the following... (3 Replies)
Discussion started by: arn_ch
3 Replies

2. UNIX for Dummies Questions & Answers

How to configure Full Duplex and TCP/IP

We are using ZIX 4.3.3 and we need to configure the NIC for ful duplexing and we also need to configure it for a TCP/IP default gateway and DNS server to acccess the Interent. Can you please tell me the commands and procedures for configuring this? Thanks Marc (2 Replies)
Discussion started by: marc3483
2 Replies

3. UNIX for Dummies Questions & Answers

Full Duplex Howto

Dear Members, I was reading a few posts and saw something about installing two Nics so one could use Full Duplex. I remember back in the day of dial up, you could have two modems and use one for upstream and one for downstream. This was called shotgunning. It seems that you can now do the same... (4 Replies)
Discussion started by: Phobos
4 Replies

4. 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

5. Solaris

100 gigabit full duplex

How can I tell on Solaris 9 sparc if my nics are running 100 gigabit full duplex... (4 Replies)
Discussion started by: csaunders
4 Replies

6. Solaris

How to force a full duplex

I need to change some Ip addresses for my servers to reflect in the NIS map. I also need to force full duplex on the 10/100 cards & 1/2 duplex in the 10 cards. I can change the IP by doing ifconfig <NIC card > plumb up <newip>. Not quite sure on how to force the full / half duplex & how to... (2 Replies)
Discussion started by: Remi
2 Replies

7. SuSE

configure full duplex

How do I configure full duplex on suse 8.2 I tried ethtool -s eth0 speed 100 duplex full autoneg off the above works but when I reboot the machine the configure was lost. How do I configure full duplex so that when the machine get rebooted the configuration will stay. My interface... (4 Replies)
Discussion started by: hassan2
4 Replies

8. UNIX for Advanced & Expert Users

How to set full duplex for solaris 5.5

I would like to change half duplex to full duplex on solaris 5.5. I tried with below commands but they didnt work on solaris 5.5. #ndd -set /dev/le adv_100fdx_cap 1 (6 Replies)
Discussion started by: csreenivas
6 Replies

9. 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

10. UNIX for Advanced & Expert Users

100Mb/s full duplex link

Hi, I have been trying to connect two computers directly through their LAN cards. One is a 3com 3c905c 10/100 Mbit/s card and the other is an Intel i217-lm 10/100/1000Mbit/s card. I have connected them through a CAT 6 cable. Whenever autoneg is turned on, the PCs connect in the 10Mb/s mode, and... (7 Replies)
Discussion started by: jamie_123
7 Replies

LEARN ABOUT NETBSD

bnx

BNX(4)							   BSD Kernel Interfaces Manual 						    BNX(4)

NAME

     bnx -- Broadcom NetXtreme II 10/100/1000 Ethernet device

SYNOPSIS

     bnx* at pci?
     brgphy* at mii?

DESCRIPTION

     The bnx driver supports Broadcom's NetXtreme II product family, such as the BCM5706 PCI-X and BCM5708-BCM5709 PCI Express Ethernet con-
     trollers, which includes the following:

     o	 Dell PowerEdge 1950 integrated BCM5708 NIC (10/100/1000baseT)
     o	 Dell PowerEdge 2950 integrated BCM5708 NIC (10/100/1000baseT)
     o	 Dell PowerEdge M710 integrated BCM5709S NIC (1000baseSX)
     o	 HP NC370F PCI-X Multifunction Gigabit server adapter (1000baseSX)
     o	 HP NC370T PCI-X Multifunction Gigabit server adapter (10/100/1000baseT)
     o	 HP NC373F PCI Express Multifunction Gigabit server adapter (1000baseSX)
     o	 HP NC373i PCI Express Multifunction Gigabit embedded server adapter (10/100/1000baseT)
     o	 HP NC380T PCI Express Dual Port Multifunction Gigabit server adapter (10/100/1000baseT)
     o	 IBM xSeries 3550 integrated BCM5708 NIC (10/100/1000baseT)
     o	 IBM xSeries 3650 integrated BCM5708 NIC (10/100/1000baseT)

     The NetXtreme II product family is composed of various Converged NIC (or CNIC) Ethernet controllers which support a TCP Offload Engine (TOE),
     Remote DMA (RDMA), and iSCSI acceleration, in addition to standard L2 Ethernet traffic, all on the same controller.  The following features
     are supported in the bnx driver under NetBSD:

	   IPv4 receive IP/TCP/UDP checksum offload
	   Jumbo frames (up to 9022 bytes)
	   VLAN tag insertion
	   Interrupt coalescing
	   10/100/1000Mbps operation in full-duplex mode
	   10/100Mbps operation in half-duplex mode

     The bnx driver supports the following media types:

     autoselect   Enable autoselection of the media type and options.  The user can manually override the autoselected mode via ifconfig(8).

     10baseT/UTP  Set 10Mbps operation.  The ifconfig(8) mediaopt option can also be used to select either full-duplex or half-duplex modes.

     100baseTX	  Set 100Mbps (Fast Ethernet) operation.  The ifconfig(8) mediaopt option can also be used to select either full-duplex or
		  half-duplex modes.

     1000baseTX   Set 1000baseTX operation over twisted pair.  Only full-duplex mode is supported.

     1000baseSX   Set 1000Mbps (Gigabit Ethernet) operation.  Both full-duplex and half-duplex modes are supported.

     2500baseSX   Set 2500Mbps operation.  Only full-duplex mode is supported.

     The bnx driver supports the following media options:

     full-duplex  Force full duplex operation.

     half-duplex  Force half duplex operation.

     For more information on configuring this device, see ifconfig(8).

SEE ALSO

     arp(4), brgphy(4), ifmedia(4), intro(4), mii(4), netintro(4), pci(4), ifconfig(8)

HISTORY

     The bnx device driver first appeared in NetBSD 4.0.

BSD
								 December 10, 2010							       BSD
All times are GMT -4. The time now is 03:41 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy