Heritage Series ADSL Bridge/ Router

 

 

7-23

Command Sets for Command Line Interface

 

vlane

//edd

 

 

//lane

 

 

flane

//lec1

 

IP-over-ATM

bridge

//bridge

 

atm

//q93b

 

Loopback

atmpvc

//atm

 

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.

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IBM Heritage user manual IP-over-ATM
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Heritage specifications

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