X.25 Configuration 7-5

Diagramming Your X.25 Network

To ensure that all connections to the X.25 network are properly diagrammed, complete these step:

1)Diagram the existing X.25 network showing all router access points and mark the X.25 addresses.

2)Draw each type of connection from the local router to its corresponding partner.

For PVC-type connections, show the LCN assigned by the X.25 network service provider and the partner name.

For SVC-type connections, list the partner names.

Planning Your X.25 Network

To ensure that all aspects of your planned connections to the X.25 network are covered, complete the following steps:

For each location that a router attaches to the X.25 network, specify the following parameters:

Physical interface required (for example, V.35 or RS-232)

Internal interface speed required (for example, 9600 or 19200)

This value is needed only when the clocking is generated internally; otherwise, clocking comes from the modem.

Number of partner routers which will be connected using X.25 and whether a PVC or an SVC is required for each.

Packet size required (for example, 128 bytes or 256 bytes)

Emulex X.25 Router ID (at top of page) - Symbolic name assigned by the system administrator to identify a particular Emulex X.25 router. The ID provides a way to track or reference a particular Emulex X.25 router.

Frame Level Parameters

Sequencing Modulo - Specifies the numbering of sequential frames allowed in a Data-Link layer window. Modulo 8 is specified for 1984 CCITT X.25 Specifications.

Window Size (k) - Determines the maximum number of unacknowledged frames that can be received or sent before requiring an acknowledgment by the remote destination.

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Emulex DCP_link manual Diagramming Your X.25 Network, Planning Your X.25 Network, Frame Level Parameters