Overview of Packet over SONET SPAs

Table Of Contents

Overview of Packet over SONET SPAs

Release History

Supported Features

Cisco 12000 SIP-600 Features

1-Port OC-192c/STM-64 POS/RPR XFP SPA Features

Restrictions

Supported MIBs

SPA Architecture

1-Port OC-192c/STM-64 POS/RPR XFP SPA Architecture

Displaying the SPA Hardware Type

Example of the show inventory Command

Example of the show hw-module Command

Overview of Packet over SONET SPAs

This chapter provides an overview of the release history, and feature and Management Information Base (MIB) support for a Cisco XR 12000 Series Router with the 1-Port OC-192c/STM-64 POS/RPR XFP SPA.

This chapter includes the following sections:

• Release History

• Supported Features

• Supported MIBs

• Displaying the SPA Hardware Type

Release History

Table 5-1 describes the hardware release history for the Cisco XR 12000 Series Router.

Table 5-1 Hardware Release History

Release

Modification

Cisco IOS Release 3.2

Support for the following hardware was introduced on the Cisco XR 12000 Series Router:

•Cisco 12000 SIP-600

•1-Port OC-192c/STM-64 POS/RPR XFP SPA

Supported Features

This section provides a list of some of the primary features supported by the SIP and SPA hardware and software.

Cisco 12000 SIP-600 Features

•Online insertion and removal (OIR)

•High Availability (HA) support—Route Processor Redundancy (RPR) mode support

Although the default HA mode is Stateful Switchover (SSO) on a Cisco XR 12000 Series Router, the router automatically falls back to RPR mode for unsupported devices. Therefore, RPR is used with the SIP on a Cisco XR 12000 Series Router, and no additional configuration is required to implement HA with a SIP on a Cisco XR 12000 Series Router.

More information about HA on the Cisco 7304 router can be found at the following URL:

http://www.cisco.com/univercd/cc/td/doc/product/software/ios122s/122snwft/release/122s18/12e_rpr.htm

•Field Programmable Gate Array (FPGA) upgrade support

The Cisco 12000 SIP-600 supports the standard FPGA upgrade methods for the Cisco XR 12000 Series Router. For more information about FPGA support, see Chapter 7, "Upgrading Field-Programmable Devices."

•Hot Standby Router Protocol (HSRP) and Virtual Router Redundancy Protocol (VRRP) support

•NetFlow switching

•QoS features supported by the NSE-100 and NPE-G100

•Network-Based Application Recognition (NBAR) with the NPE-G100

•Access control lists (ACLs)

•IPv4 and PCv6 support.

1-Port OC-192c/STM-64 POS/RPR XFP SPA Features

The following is a list of some of the significant hardware and software features supported by the 1-Port OC-192c/STM-64 POS/RPR XFP SPA:

•Terminates and generates SONET/SDH section, line, and path overheads

•Supports HDLC/PPP framed packets

•Packet mapping conforms to RFC 1619 and RFC 1662 for Packet-over-SONET applications

•Internal buffering to absorb short bursts of data traffic at the bus interface

•IPv4 and IPv6 support

•Counter and alarm capabilities for management support

•Local (internal) and external loopback

•Per interface port counters

•Multiprotocol label switching (MPLS)

•Simple Network Management Protocol (SNMP) Management Information Base (MIB) counters

•Field Programmable Gate Array (FPGA) upgrade support

Restrictions

As of Cisco IOS Release 12.0S, the 1-Port OC-192c/STM-64 POS/RPR XFP SPA does not support the following features:

•RSP/SRP

Supported MIBs

The following MIBs are supported in Cisco IOS Release 12.2(20)S1 for the 1-Port OC-192c/STM-64 POS/RPR XFP SPA on the Cisco XR 12000 Series Router:

•CISCO-ENTITY-ASSET-MIB

•CISCO-EXTENDED ENTITY-MIB

•CISCO-OPTICAL-MIB

•ENTITY-MIB

•IF-MIB

•SONET-MIB RFC 2558

To locate and download MIBs for selected platforms, Cisco IOS releases, and feature sets, use Cisco MIB Locator found at the following URL:

http://tools.cisco.com/ITDIT/MIBS/servlet/index

If Cisco MIB Locator does not support the MIB information that you need, you can also obtain a list of supported MIBs and download MIBs from the Cisco MIBs page at the following URL:

http://www.cisco.com/public/sw-center/netmgmt/cmtk/mibs.shtml

To access Cisco MIB Locator, you must have an account on Cisco.com. If you have forgotten or lost your account information, send a blank e-mail to cco-locksmith@cisco.com. An automatic check will verify that your e-mail address is registered with Cisco.com. If the check is successful, account details with a new random password will be e-mailed to you. Qualified users can establish an account on Cisco.com by following the directions found at this URL:

http://www.cisco.com/register

SPA Architecture

This section provides an overview of the architecture of the POS SPAs and describes the path of a packet in the ingress and egress directions. Some of these areas of the architecture are referenced in the SPA software and can be helpful to understand when troubleshooting or interpreting some of the SPA CLI and show command output.

1-Port OC-192c/STM-64 POS/RPR XFP SPA Architecture

Figure 5-1 identifies the primary hardware devices that are part of the POS 1-Port OC-192c/STM-64 POS/RPR XFP SPA architecture.

Figure 5-1 1-Port OC-192c/STM-64 POS/RPR XFP SPA Architecture

In POS mode, every incoming and outgoing packet on the 1-Port OC-192c/STM-64 POS/RPR XFP SPA goes through the SONET/SDH framer, and the SPI4.2 interface.

Path of a Packet in the Ingress Direction

The following steps describe the path of an ingress packet through the 1-Port OC-192c/STM-64 POS/RPR XFP SPA (see Figure 5-1):

1. The framer receives SONET/SDH streams from the XFP optics, extracts clocking and data, and processes the section, line, and path overhead.

2. The framer extracts the POS frame payload and verifies the frame size and frame check sequence (FCS).

3. The framer passes valid frames to the System Packet Level Interface 4.2 (SPI4.2) interface on the SPA.

4. The SPI4.2 interface transfers frames to the host through the SPI4.2 bus for further processing and switching.

Path of a Packet in the Egress Direction

The following steps describe the path of an egress packet through the 1-Port OC-192c/STM-64 POS/RPR XFP SPA (see Figure 5-1):

1. The host sends packets to the SPA using the SPI4.2 bus.

2. The SPA stores the data in the appropriate channel's first-in first-out (FIFO) queue.

3. The SPA passes the packet to the framer.

4. The framer accepts the data and stores it in the appropriate channel queue.

5. The framer adds the FCS and SONET/SDH overhead.

6. The framer sends the data to the XFP optics for transmission onto the network.

Displaying the SPA Hardware Type

To verify the SPA hardware type that is installed in your Cisco XR 12000 Series Router, you can use the show interfaces command or the show controllers command. There are several other commands on the Cisco XR 12000 Series Router that also provide SPA hardware information.

To verify the SPA hardware type that is installed in your Cisco XR 12000 Series Router, you can use the following commands:

•show inventory

•show hw-module subslot brief

Table 5-2 shows the hardware description that appears in the show command output for each type of SPA that is supported on the Cisco XR 12000 Series Router.

Table 5-2 SPA Hardware Description in show Commands

SPA

Description in show commands

1-Port OC-192c/STM-64 POS/RPR XFP SPA

"Hardware is Packet over Sonet"

Example of the show inventory Command

The following example shows output from the show inventory command on a Cisco XR 12000 Series Router with a 1-Port OC-192c/STM-64 POS/RPR XFP SPA installed in subslot 0 of the SIP in slot 3:

RP/0/0/CPU0:x-21#show inventory NAME: "0/0/CPU0", DESCR: "Cisco 12000 Series Performance Route Processor 2" PID: PRP-2 , VID: N/A, SN: SAD0826025M

NAME: "0/3/CPU0", DESCR: "Cisco 12000 Series SPA Interface Processor-600 " PID: 12000-SIP-600 , VID: N/A, SN: SAD073303F8

NAME: "0/3/0", DESCR: "1-Port OC192/STM64 POS/RPR XFP Optics" PID: SPA-OC192POS-XFP , VID: V01, SN: PRTA1204185

NAME: "0/3/1", DESCR: "1-port 10GbE Shared Port Adapter XFP based" PID: SPA-1XTENGE-XFP , VID: V01, SN: PRTA2104133
Table 5-3 describes the significant fields shown in the display.

Table 5-3 show inventory Field Descriptions

Field

Description

NAME

Identifies the hardware for which the inventory information is displayed. If you are displaying raw inventory, this field shows the node name. For a node, the NAME is expressed in rack/slot/subslot notation.

DESCR

Node description. The description "1-Port OC192/STM64 POS/RPR XFP Optics" indicates the 1-Port OC-192c/STM-64 POS/RPR XFP SPA.

PID

Physical model name of the node.

VID

Physical hardware revision of the node.

SN

Physical serial number for the node.

Example of the show hw-module Command

The following example shows output from the show hw-module subslot brief command on a Cisco XR 12000 Series Router with a 1-Port OC-192c/STM-64 POS/RPR XFP SPA installed in subslot 0:

RP/0/0/CPU0:x-21#show hw-module subslot 0/3/cpu0 brief
Subslot 0/3/0 brief info: ----------------------- SPA inserted: YES SPA type: 1xOC192 POS/RPR HHSPA with XFP SPA operational state: READY SPA cfg admin up: YES

Subslot 0/3/1 brief info: ----------------------- SPA inserted: YES SPA type: 1x10GE XFP SPA SPA operational state: READY SPA cfg admin up: YES

Table 5-4 describes the significant fields shown in the display.

Table 5-4 show hw-module subslot brief Field Descriptions

Field

Description

SPA inserted

Indicates if a SPA is currently detected in the subslot.

SPA type

Description of SPA including the technology type, number of ports, height of SPA (HHSPA—single height, FHSPA—double height), and optics type.

SPA operational state

Current state of the SPA module.

SPA cfg admin up

Configured state of the SPA: YES—the SPA is not shut down, NO—the SPA is shut down.

Field	Description
NAME	Identifies the hardware for which the inventory information is displayed. If you are displaying raw inventory, this field shows the node name. For a node, the NAME is expressed in rack/slot/subslot notation.
DESCR	Node description. The description "1-Port OC192/STM64 POS/RPR XFP Optics" indicates the 1-Port OC-192c/STM-64 POS/RPR XFP SPA.
PID	Physical model name of the node.
VID	Physical hardware revision of the node.
SN	Physical serial number for the node.

Field	Description
SPA inserted	Indicates if a SPA is currently detected in the subslot.
SPA type	Description of SPA including the technology type, number of ports, height of SPA (HHSPA—single height, FHSPA—double height), and optics type.
SPA operational state	Current state of the SPA module.
SPA cfg admin up	Configured state of the SPA: YES—the SPA is not shut down, NO—the SPA is shut down.