
Customizing PPP
114068 Rev. A 3-21
Specifying the Outbound Link Quality
The Outbound Link Quality parameter specifies the minimum acceptable success
rate (percentage) of packets the router transmits and the peer router receives on
this interface.
If the percentage drops below the outbound link quality you specify, the router
brings down the link until the percentage increases to an acceptable level.
The default value for this parameter is 90 (percent). You can specify values in the
range 1 through 100 (percent).
Specifying the Asynchronous Modem Control Character Map
During LCP negotiations, the peers negotiate the characters that they will
recognize as asynchronous modem control characters. PPP creates a 32-bit map
that represents the negotiated control characters. Both routers use this map in
sending and receiving data packets. While the default value serves for almost all
modems, you can configure the map for other modem control characters if
necessary.
The async control character map specifies a value representing one or more
asynchronous modem control characters for the peer to recognize (“escape”) and
that may occur in the data packet. Each bit in the map corresponds to one control
character, 0x00 (the right end of the map) through 0x1F (the left end of the map);
that is, 0 through 31, decimal. The actual map is a value used essentially as a
mask. For example, the default map value, 0xA0000 (655360 decimal) allows the
escaping of the control characters 0x11 (XON) and 0x13 (XOFF) if they occur in
the data stream. The values 0x7D and 0x7E are always escaped.
Site Manager: Outbound Link Quality parameter: page A-22
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