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Configuring Channelized STM1 Interface Properties

To configure the interface properties for Channelized STM1-to-E1 PICs, include the e1-options and sonet-options statements for both sides of the connection. The following configurations list all the valid statements.

To specify options for each of the E1 channels on the Channelized STM1-to-E1 PIC, include the e1-options statement at the [edit interfaces interface-name] hierarchy level:



[edit interfaces interface-name]

e1-options {

bert-error-rate;

bert-period;

fcs (16 | 32);

framing (g704 | g704-no-crc4
| unframed);

idle-cycle-flag (flags | ones);

loopback (local | remote);

start-end-flag (filler | shared);

timeslots time-slot-number;
}

Note: When a channelized STM1 interface experiences a line transition, the E1 channels configured in unframed mode log a large number of drops (around 24,000) as the channelized STM1 interface clocks resynchronize. This does not occur on framed channels, because the framing resynchronizes clocks very quickly.

To specify options for the SONET/SDH side of the connection, include the sonet-options statement at the [edit interfaces interface-name] hierarchy level:



[edit interfaces interface-name]

sonet-options {



aps {

advertise-interval milliseconds;

authentication-key key;

force;

hold-time milliseconds;

lockout;

neighbor address;

paired-group group-name;

protect-circuit group-name;

request;

revert-time seconds;

switching-mode (bidirectional | unidirectional);

working-circuit group-name;
}





bytes {
e1-quiet value;
f1 value;
f2 value;
s1 value;
z3 value;
z4 value;
}



loopback (local | remote);
}

Note: On channelized STM1 interfaces, you should configure the clock source on one side of the connection to be internal (the default JUNOS configuration) and on the other side of the connection to be external.

For information about Frame Relay DLCI limitations for channelized interfaces, see Data-Link Connection Identifiers on Channelized Interfaces. For more information about Frame Relay DLCIs, see Configuring a Point-to-Point Frame Relay Connection. For information about DLCI sparse mode, see the JUNOS System Basics Configuration Guide.

For more information about specific statements, see Configuring E1 Interfaces, Configuring SONET/SDH Interfaces, and Configuring T1 Interfaces. For a configuration example, see Example: Configuring Channelized STM1 Interfaces.

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