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config>port>tdm>e3
Description
This command enables payload scrambling on channel groups.
Scrambling randomizes the pattern of 1s and 0s carried in a SONET frame. Rearranging or scrambling the
pattern prevents continuous strings of all 1s or all 0s and meets the needs of physical layer protocols that rely
on sufficient transitions between 1s and 0s to maintain clocking.
For ATM, this command enables or disables ATM cell-level payload scrambling/descrambling using x43+1
polynomial as defined in ITU-T I.432.1. Scrambling is enabled by default for the ATM path/channel. Note
that this scrambling is done in addition to SONET/SDH frame scrambling/descrambling, which is always
enabled in the framer.
The no form of this command disables scrambling.
Default
no scramble
keepalive
Syntax
keepalive time-interval [dropcount drop-count]
no keepalive
Context
config>port>sonet-sdh>path>ppp
config>port>tdm>ds1>channel-group>cisco-hdlc
config>port>tdm>ds1>channel-group>ppp
config>port>tdm>ds3>ppp
config>port>tdm>e1>ppp
config>port>tdm>e3>ppp
Description
This command sets the keepalive interval.
The no form of this command returns the interval to the default value.
Default
10
Parameters
time-interval — Specifies the time in seconds between keepalive messages, expressed as a decimal integer.
Values
drop-count — Specifies the number of consecutive keepalive failed request attempts or remote replies that
can be missed after which the port is operationally downed.
Values
7710 SR OS Interface Configuration Guide
1 — 60 seconds
1 — 255
Interface Configuration
Page 197
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