Specifications

SET/DEFINE/CHANGE Commands
4-68
PORT PPP LCP CALLBACK
(privileged)
Syntax
Description
This command specifies whether the access server allows the peer to negotiate the
use of the PPP callback option. If enabled, the peer is allowed to request the access
server to call back the peer. If disabled, the access server will refuse to accept the
peer’s connection request if the peer requests a callback.
PORT PPP LCP MAP
Syntax
Description
This command lets the access server tell the peer which characters require byte-
stuffing. Some characters potentially have special meaning to the underlying
layers of software or hardware, for example XON/XOFF. Byte-stuffing lets these
characters be encapsulated into a two-byte sequence that allows the original
character to pass as data. By default, the low 32 ASCII bytes are byte stuffed,
which requires additional overhead and consumes bandwidth on a slow serial
line. The fewer characters that require byte-stuffing on a given line, the better the
performance. This option provides a means to inform the peer of which specific
characters require byte-stuffing.
Bits are set in the mask to identify which characters must be stuffed. The bits are
ordered right to left, such that the hex character 0x0 (the ASCII character NUL)
would need the mask to have the rightmost bit set, that is, 0x00000001. The
default of having all characters byte stuffed would use a mask of 0xFFFFFFFF.
Example: PORT PPP LCP MAP
If only XON and XOFF require byte-stuffing, the mask would be set to
0x000A0000. The syntax for the command would be the following:
Local> set port lcp map a0000