3Com MSR 50 449, Option Description Broadcast, Protocols such as Routing Information Protocol

449

Table 66 Description on the attributes or user facilities of X.25 address mapping

Option	Description
broadcast	Sends broadcasts of network protocol and multicasts of IP to
	the destination. This option provides support for some routing
	protocols (such as Routing Information Protocol).

closed-user-group group number

compress encapsulation-type

idle-timer minutes

no-callin no-callout

packet-size input-sizeoutput-size

reverse-charge-accept

Specifies a closed user group (CUG) number for the X.25 interface, in the range 0 to 9999.

Compresses X.25 payloads.

Encapsulation type, with nonstandard, ietf, multi-protocoland snap available.

Maximum idle time for the VC associated with the address mapping. 0 means that the idle time is infinite.

Disables accepting calls to the address mapping.

Disables calls originating from the address mapping.

Carries out maximum packet size negotiation when initiating calls from the mapping. It needs two parameters: maximum input packet size and maximum output packet size, which must range from 16 to 4096 bytes, and must be the integer power of 2.

If a call initiated by the address mapping carries reverse charging request, to accept the call, this option must be configured in the address mapping.

reverse-charge-request	Specifies calls from the address mapping to carry reverse
	charging requests
roa-list roa-name	Specifies an ROA list name for the X.25 interface. The roa name
	is a string of 1 to 19 characters.
send-delay delay-time	Carries out the maximum network transmission delay
	negotiation when initiating calls from the mapping. The delay
	time is in the range 0 to 65534 ms.
threshold input-value	Specifies threshold values when initiating throughput
output-value	negotiation with the peer from the mapping. The values of
	input/output can only be 75, 150, 300, 600, 1200, 2400, 4800,
	9600, 19200, or 48000.

vc-per-map count

window-size input-window-sizeoutput-window-size

Maximum number of VCs associated with the address mapping, in the range 1 to 8.

Carries out the window size negotiation with the peer when initiating calls from the address mapping, including input window size and output window size. When the modulo is 8, the size is in the range 1 to 7; when the modulo is 128, it is in the range 1 to 127.

Description Use the x25 map command to set the address mapping between IP address and X.121 address.

Use the undo x25 map command to delete a mapping.

By default, no address mapping is configured.

Since X.25 protocol can multiplex multiple logical virtual circuits on a physical interface, you need to manually specify the mapping relation between all network addresses and X.121 addresses.

Once you have specified an address mapping, its contents (including protocol address, X.121 address and all options) cannot be changed. To make