AIS AI2524 user manual Set Default Window Sizes, Set Default Packet Sizes

AI2524 Router Card User’s Manual

Set the Default Flow Control Values

Because X.25 is a strongly flow-controlled protocol, setting correct default flow control parameters for window size and packet size is es- sential. Mismatched default flow control values will cause X.25 local procedure errors, evidenced by Clear and Reset events.

To configure flow control parameters, complete these tasks. Thes tasks are optional if your X.25 attachment uses the standard default values for maximum packet sizes (128 bytes incoming and outgoing and window sizes (2 packets incoming and outgoing).

zSet Default Window Sizes

zSet Default Packet Sizes

Note:	Because the X.25 protocol requires the DTE and DCE to
	have identical default maximum packet sizes and default
	window sizes, changes made to the window and packet
	sizes when the interface is up are held until the X.25 pro-
	tocol restarts the packet service.

Set Default Window Sizes

X.25 networks have a default input and output window size (the preset value is 2) that is defined by your network administrator. You must set the Cisco IOS software default input and output window sizes to match those of the network. These defaults are the values that an SVC uses if it is set up without explicitly negotiating its window sizes. PVCs also use these default values unless different values are configured.

In interface configuration mode, set the default window sizes:

1.Set the default virtual circuit receive window size. x25 win packets

2.Set the default virtual circuit transmit window size. x25 wout packets

Set Default Packet Sizes

X.25 networks have a default maximum input and output packet siz (the preset value is 128) that is defined by your network administrator. You must set the Cisco IOS software default input and output maxi- mum packet sizes to match those of the network. These defaults are the values that an SVC uses if it is set up without explicitly negotiating its

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