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Command Reference

Release 11.2 GS

pos ﬂag

To set the SONET overhead bytes in the frame header to meet a speciﬁc standards requirement or to

ensure interoperability with another vendor’s equipment, use the pos ﬂag interface conﬁguration

command. To remove the setting of the SONET overhead bytes, use the no form of this command.

pos ﬂag {c2 | j0 | s1s0} value

no pos ﬂag {c2 | j0 | s1s0} value

Syntax Description

Default

The default c2 value is 0xCF, and the default sls0 value is 0.

Command Mode

Interface conﬁguration

Usage Guidelines

This command was added in Cisco IOS Release 11.2 GS to support the Cisco 12000 series Gigabit

Switch Routers.

Example

The following example sets the path signal identiﬁer used to identify the payload content type to

ATM on the line card in slot 9:

Router(config)# interface pos 9/0

Router(config-if)# pos flag c2 0x13

Router(config-if)# end

Router#

c2 value Path signal identiﬁer used to identify the payload content type. Use the

following values to tell the SONET transmission equipment the payload

type:

• For PPP (or HDLC when required), use 0xCF (this is the default).

• For ATM, use 0x13.

• For other equipment, use any non-zero value.

The byte value can be 0 to 255.

j0 value Section trace byte (formerly the C1 byte). For interoperability with SDH

equipment in Japan, use the value 0x1. The byte value can be 0 to 255.

sls0 value S1 and S0 bits (bits 5 and 6 of the H1 #1 payload pointer byte). Use the

following values to tell the SONET transmission equipment the SS bit:

• For OC-3c, use 0 (this is the default).

• For AU-4 container in SDH, use 2.

The S1 and S0 bits can be 0 to 3. Values 1 and 3 are undeﬁned.

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