change NIC speed Post: 302475884

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Operating Systems Solaris change NIC speed Post 302475884 by hergp on Tuesday 30th of November 2010 07:53:25 AM

11-30-2010

Registered User

The way to do this depends on the type of NIC you are using.

For some types you make entries in /etc/systems, like these to set all qfe-interfaces to 100 MBit Fullduplex.

Code:

set qfe:qfe_adv_autoneg_cap = 0
set qfe:qfe_adv_100fdx_cap = 1
set qfe:qfe_adv_100hdx_cap = 0
set qfe:qfe_adv_10fdx_cap = 0
set qfe:qfe_adv_10hdx_cap = 0
set qfe:qfe_adv_100T4_cap = 0

If you have ce interfaces, entries in /etc/system do not work. You have to create an init-script like this (which sets only ce0 to 100 MBit Full) and make sure, it is run at system boot.

Code:

ndd -set /dev/ce instance 0
ndd -set /dev/ce adv_1000fdx_cap 0
ndd -set /dev/ce adv_1000hdx_cap 0
ndd -set /dev/ce adv_100fdx_cap 1
ndd -set /dev/ce adv_100hdx_cap 0
ndd -set /dev/ce adv_10fdx_cap 0
ndd -set /dev/ce adv_10hdx_cap 0
ndd -set /dev/ce adv_autoneg_cap 0

Some NICs can't even be configured using the ndd command. Instead you have to make entries in the driver's config file under /kernel/drv. The format of these entries is driver dependent.

Consult the NICs documentation or places on the internet (like this forum) to find out, which kind of configuration is supported and which not.

Finally: please use interface fixation only as a last resort. Autonegotiation is today's technology and for gigabit ethernet it is mandatory anyway.

hergp

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LEARN ABOUT CENTOS

ndd

ndd(1M) 						  System Administration Commands						   ndd(1M)

NAME

       ndd - get and set driver configuration parameters

SYNOPSIS

       ndd [-set] driver parameter [value]

DESCRIPTION

       ndd  gets  and  sets  selected configuration parameters in some kernel drivers. Currently, ndd only supports the drivers that implement the
       TCP/IP Internet protocol family.  Each driver chooses which parameters to make visible using  ndd.   Since  these  parameters  are  usually
       tightly coupled to the implementation, they are likely to change from release to release. Some parameters may be read-only.

       If the -set option is omitted, ndd queries the named driver, retrieves the value associated with the specified parameter, and prints it. If
       the -set option is given, ndd passes value, which must be specified, down to the named driver which assigns it to the named parameter.

       By convention, drivers that support ndd also support a special read-only parameter named ``?'' which can be used  to  list  the	parameters
       supported by the driver.

EXAMPLES

       Example 1: Getting Parameters Supported By The TCP Driver

       To see which parameters are supported by the TCP driver, use the following command:

       example% ndd /dev/tcp ?

       The parameter name ``?'' may need to be escaped with a backslash to prevent its being interpreted as a shell meta character.

       The following command sets the value of the parameter ip_forwarding in the dual stack IP driver to zero. This disables IPv4 packet forward-
       ing.

       example% ndd -set /dev/ip ip_forwarding 0

       Similarly, in order to disable IPv6 packet forwarding, the value of parameter ip6_forwarding

       example% ndd -set /dev/ip ip6_forwarding 0

       To view the current IPv4 forwarding table, use the following command:

       example% ndd /dev/ip ipv4_ire_status

       To view the current IPv6 forwarding table, use the following command:

       example% ndd /dev/ip ipv6_ire_status

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWcsu			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       nca(1), ioctl(2), attributes(5), arp(7P), ip(7P), ip6(7P), tcp(7P), udp(7P)

NOTES

       The parameters supported by each driver may change from release to release.  Like programs that read  /dev/kmem,  user  programs  or  shell
       scripts that execute ndd should be prepared for parameter names to change.

       The  ioctl()  command  that ndd uses to communicate with drivers is likely to change in a future release. User programs should avoid making
       dependencies on it.

       The meanings of many ndd parameters make sense only if you understand how the driver is implemented.

SunOS 5.10							    8 Nov 1999								   ndd(1M)