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Table Of Contents
Overview of the Cisco XR 12000 Series Router SIPs
Displaying the SPA Hardware Type
Example of the show inventory Command
Overview of the Cisco XR 12000 Series Router SIPs
This chapter provides an overview of the release history, and feature and Management Information Base (MIB) support for the SPA interface processors (SIPs) supported on the Cisco XR 12000 Series Routers.
This chapter includes the following sections:
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Cisco 12000 SIP-600 Features
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Release History
Table 2-1 describes the release history for the SIP hardware.
Cisco 12000 SIP-600 Features
The Cisco 12000 SIP-600 provides a common 10 Gbps forwarding and queuing engine responsible for packet classification, forwarding, queuing, and accounting without compromising performance. The Cisco 12000 SIP-600 has two forwarding engines, one for ingress and one for egress. This allows the user to implement different features and QoS policies for the ingress and egress interfaces. The multicast replication is done by the egress forwarding engine, hence a very scalable multicast with built-in QoS.
The Modular Physical Layer Interface Module (PLIM) front end hosts up to 2 SPAs. Each SPA has a dedicated 10 Gbps interface to the SPA controller. The SPA controller uses a fair bandwidth allocation algorithm to share available and excess bandwidth between the 2 SPAs. The oversubscribed SPA does not cause any packet-drop on the nonoversubscribed SPA, and any unused bandwidth from one SPA is used by the other SPA.
The Cisco 12000 SIP-600 supports any combination of the following pluggable SPAs and Layer 2 encapsulations:
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The SPA controller adapts the user traffic flowing between the SPA interfaces for the Layer 3 forwarding engine. The SPA controller has two levels of priority queuing with Deficit Round Robin (DRR) and Strict Priority Servicing. Strict Priority Servicing protects higher-priority packets by dropping lower priority packets first, in an oversubscribed configuration (persistent incoming traffic rate of 20 Gbps.)
The Cisco 12000 SIP-600 provides the following key features:
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Supported MIBs
The following MIBs are supported in Cisco IOS-XR Release 3.2 for the Cisco 12000 SIP-600 on a Cisco XR 12000 Series Router:
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To locate and download MIBs for selected platforms, Cisco IOS-XR releases, and feature sets, use Cisco MIB Locator found at the following URL:
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:
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 inventory command.
Table 2-2 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.
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 Cisco 12000 SIP-600 installed in slot 3:
RP/0/0/CPU0:x-21# show inventoryNAME: "0/0/CPU0", DESCR: "Cisco 12000 Series Performance Route Processor 2"PID: PRP-2 , VID: N/A, SN: SAD0826025MNAME: "0/3/CPU0", DESCR: "Cisco 12000 Series SPA Interface Processor-600 "PID: 12000-SIP-600 , VID: N/A, SN: SAD073303F8NAME: "0/3/0", DESCR: "1-Port OC192/STM64 POS/RPR XFP Optics"PID: SPA-OC192POS-XFP , VID: V01, SN: PRTA1204185NAME: "0/3/1", DESCR: "1-port 10GbE Shared Port Adapter XFP based"PID: SPA-1XTENGE-XFP , VID: V01, SN: PRTA2104133
Posted: Mon Jan 9 20:21:13 PST 2006
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