mtrconfig - configure or display Madge PCI Token Ring interface
/usr/etc/mtrconfig interface [ parameters ]
/usr/etc/mtrconfig interface -v
/usr/etc/mtrconfig [ interface ] -f config_file
Mtrconfig is used to configure the Madge token ring specific parameters
in each token ring interface. General network parameters, such as network
address, are configured through ifconfig (1).
Mtrconfig is invoked at boot time from /etc/init.d/network to start the
token ring interface when it detects the existence of a Madge token ring
PCI device. The default values defined in /var/sysgen/mtune/if_mtr are
used for all the interfaces in the system. These values can be modified
The interface parameter is a string of the form ``mtr unit'', e.g.,
``mtr0'' or ``mtr1''. Use netstat (1) to display the names of token ring
interfaces on the machine.
Only the super-user is allowed to use mtrconfig and only one instance of
mtrconfig can be running at one time.
The following parameters may be set with mtrconfig :
Change an interface's ring speed. Values other than 4 or
16 will be rejected. Since the maximum size of a
transmitting packet is the function of ring speed, the
request is rejected if the interface's current maximum
packet size is not suitable for the new ring speed. The
limitation of the maximum packet size are 4472 and 17800
for ring speed of 4Mb and 16Mb, respectively. Use the
option -v to find out the current maximum packet size of
an interface. The mtr_s16Mb variable in
/var/sysgen/mtune/if_mtr defines the default ring speed
used by all the adapters in the system.
mtu mtr_mtu Change the maximum packet size for an interface. Use the
options -v to find out the current maximum packet size of
the interface. As mentioned above, the current ring speed
gives the limitation of the value for requesting the new
size. The mtr_mtu variable in /var/sysgen/mtune/if_mtr
defines the default size used in all the adapters in the
mac open_addr Change the open address used by an interface. Each Madge
Token Ring interface has a burn-in address (BIA). It is a
6 byte MAC address that is the default open address for
sending and receiving the packets through the interface.
This command is used when the system administrator wants
to reassign the open address to LAA address (Local
Administrated Address). The given LAA address must be in
the format of xx.xx.xx.xx.xx.xx or xx:xx:xx:xx:xx:xx,
where xx is hex format of a number. Two byte MAC address
format is NOT supported.
Change broadcast address used in transmitting packets.
There are two broadcast addresses defined in Token Ring
network: 0xff:ff:ff:ff:ff:ff and 0xc0:00:ff:ff:ff:ff.
Madge Token Ring interface can receive packets with either
format. When sending a MAC broadcast packet, such as ARP
packet, the specified format is used. The mtr_batype
variable in /var/sysgen/mtune/if_mtr defines the default
broadcast address used by all interfaces in the system.
restart Restart the interface. If any of the above parameters is
changed, mtrconfig will restart the interface if
necessary, so this option is normally only used at the
system start up time to start the adapter. Note that when
``ifconfig up'' or ``ifconfig down'' is called, the
interface is marked "up" or "down", but the adapter is not
-v Report the current interface configuration.
-f config_file Read from the config_file to configure the parameters. If
an interface is specified on the command line, only the
specified interface will be reconfigured. If no interface
is specified, all the interfaces in the configuration file
are configured. In the configuration file, the comment
lines must start with '#' at the first column. Each
configuration line has the following format:
interface: [ring_speed [4|16]] [mtu mtr_mtu] [mac open_addr] [broadcast
netstat(1), network(1M), tokenring(7), ifconfig(1)
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