User guide

Packet Over SONET Module Installation and User Guide 3-27
Configuring and Monitoring PPP Functions
The following command is an enhanced application of the existing ExtremeWare
create account command. The pppuser keyword is used to specify the name of a
local database entry that is used to authenticate PPP peers.
create account pppuser <name> {encrypted} {<password>}
The PPP use of this command is described in “Creating an Authentication Database
Entry” on page 3-31.
Configuring the PoS Checksum
To configure the size of the HDLC Frame Check Sequence (FCS) to be used on the
specified SONET port, use the following command:
config ppp pos checksum [32 | 16] ports <portlist>
Choose either the 32-bit FCS or the 16-bit FCS. A 32-bit FCS is the default. RFC 2615
recommends the use of the 32-bit FCS.
For OC-3 applications, RFC 2615 allows the use of a 16-bit FCS, but
recommends using a 32-bit FCS. You should limit your use of the 16-bit FCS to
supporting interoperability with equipment that does not support the 32-bit FCS.
The following command example sets the FCS to 16 for port 1 of the PoS module
installed in slot 8 of the BlackDiamond switch.
config ppp pos checksum 16 ports 8:1
Configuring PoS Scrambling
To enable or disable payload data scrambling on the specified port, use the following
command:
config ppp user <name> {encrypted}
{<password>} ports <portlist>
Configures the user name and password that the
specified PPP ports use in the event the PPP
peer requests authentication.
show ppp {<portlist>} {detail} Displays status information for PPP ports.
unconfig ppp ports <portlist> Resets the PPP configuration parameters for the
specified ports to their default values.
Table 3-5: PPP Commands (continued)
Command Description