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Herita
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e Series ADSL Brid
g
e/ Router
7-23
Command Sets for Command Line Interface
//edd
vlane //lane
flane //lec1
bridge //bridge
IP-over-ATM atm //q93b
atmpvc //atm
Loopback loop -
“<mtu>” specifies the MTU (maximum transmission unit); that is, the
size of the largest datagram (excluding media-specific headers) that IP
will attempt to send through the interface. The value specified will be
ignored if it is larger than the maximum supported by the interface
class, which is currently 1500 except for the loopback interface, unless
the IP-over-ATM MTU has been changed; normally there is no point
in setting the MTU less than this, so the “<mtu>” option is of little
use.
“<IP address>” is the IP address that this system uses on the
interface ; if it is not specified, the interface will be disabled until an IP
address is supplied with the “ip enable” command. For a loopback
interface, the address should be set to 127.0.0.1. (All addresses of the
form 127.*.*.* will then be recognized as loopback addresses, as is
normal practice.) For non-loopback interfaces, the subnet mask for the
local network will be assumed to be ff:ff:ff:00 (e.g. a class C network);
if the correct subnet mask is other than this then it will need to be set
with the “subnet” command.
If there is no initialisation file //isfs/resolve (or
//isfs/arptable) at all, then default interfaces are configured as if
by the “device” commands
device add ether ether //edd
device add ether ether //nice (otherwise)
device add atm atm //q93b
but in each case only if the file concerned ( “//edd”, “//nice”, or
“//q93b”) can be opened. Furthermore, if the IP process is given a
command line then each argument will be treated as a possible
Ethernet-like file to open, given names “ether1”, “ether2”, and so
on. For example, if the IP process is defined in the system file as
“Process ip is tcp_ip/ip //bridge //lec1 ” (and
“//bridge” and “//lec1” can be opened), then the equivalents of
the commands
device add ether1 ether //bridge
device add ether2 ether //lec1
will be processed, in addition to the others above.