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PA-POS-OC3 Packet OC-3 Port Adapter
PA-POS-OC3 Packet OC-3 Port Adapter
Description
The Packet-Over-SONET OC3 port adapters (PA-POS-OC3SML, PA-POS-OC3SMI, and PA-POS-OC3MM) are available on Cisco 7000 series routers with the 7000 Series Route Switch Processor (RSP7000) and 7000 Series Chassis Interface (RSP7000CI), Cisco 7500 series routers, and Cisco 7200 series routers.
The POSIP and POS OC-3provide a single 155.520-Mbps, OC-3 physical layer interface for packet-based traffic. This OC-3 interface is fully compatible with SONET and Synchronous Digital Hierarchy (SDH) network facilities and is compliant with RFC 1619, "PPP over SONET/SDH," and RFC 1662, "PPP in HDLC-like Framing." The Packet-Over-SONET specification is primarily concerned with the use of the PPP encapsulation over SONET/SDH links.
For more information on the PA-POS-OC3 port adapter, refer to the PA-POS-OC3 Packet OC-3 Port Adapter Installation and Configuration publication that accompanies the hardware.
Benefits
The POS-OC-3 port adapter provided the following benefits:
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Standards-compliant SONET/SDH interface; SONET/STS-3c and SDH/STM-1 framing and signaling overhead
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Document Conventions
Command descriptions use these conventions:
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Platforms
This feature is supported on these platforms:
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Configuration Tasks
For information on how to configure a POS interface, refer to the following publications:
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For information on other commands that can be used by the POS interface, refer to the Cisco IOS Release 12.0 configuration guides.
Configuration Examples
The following is an example of a POS interface located in slot 0, port adapter slot 0, port 0 in a Cisco 7500 series router:
Router# configure terminalRouter (config)# interface POS0/0/0Router (config-if)# ip address 10.1.1.4 255.255.255.0Router (config-if)# ip route-cache distributedRouter (config-if)# no keepaliveRouter (config-if)# clock source internalRouter (config-if)# pos report rdoolRouter (config-if)# pos report laisRouter (config-if)# pos report lrdiRouter (config-if)# pos report paisRouter (config-if)# pos report prdiRouter (config-if)# pos report sd-berRouter (config-if)# no cdp enableRouter (config-if)# endRouter#For additional examples of configuring a POS interface, refer to the following publications:
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Command Reference
All commands used with this feature are documented in the following publications:
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interface pos
To specify the POS interface and enter interface configuration mode, use the interface pos global configuration command.
interface pos slot/port-adapter/port (on VIPs in Cisco 7000 series and Cisco 7500 series)
interface pos slot/port (on Cisco 7200 series)Syntax Description
Default
None
Command Mode
Global configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 11.2.
This command was modified in Cisco IOS Release 11.2 P and 11.1 CA to change the interface posi command to interface pos.
This command was modified in Cisco IOS Release 11.1 CC to make the command description generic.
Example
The following example specifies the single Packet OC-3 interface on the POS OC-3 port adapter in slot 2:
interface pos 2/0pos ais-shut
To send the line alarm indication signal (LAIS) when the POS interface is placed in any administrative shut down state, use the pos ais-shut command. In Automatic Protection Switching (APS) environments, LAIS can be used to force a protection switch. This command forces an APS switch when the interface is placed in administrative shut down state.
pos ais-shut
Syntax Description
This command has no keywords or arguments.
Default
No line alarm indication signal (LAIS) is sent.
Command Mode
Interface Configuration
Usage Guidelines
This command first appeared in Cisco Release 11.1 CC.
For more information on APS, refer to the following documents available on CCO:
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Example
The following example forces the alarm indication on the POS OC-3 interface 0 in slot 3:
interface pos 3/0shutdownpos ais-shut