Table Of Contents

Overview of the Gigabit Ethernet SPAs

Release History

Supported Features

Gigabit Ethernet SPA Features

Supported MIBs

SPA Architecture

Path of a Packet in the Ingress Direction

Path of a Packet in the Egress Direction

Displaying the SPA Hardware Type

Example of the show inventory Command

Example of the show hw-module subslot Command

Overview of the Gigabit Ethernet SPAs

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This chapter provides an overview of the release history, and feature and Management Information Base (MIB) support for the Gigabit Ethernet SPAs on the Cisco XR 12000 Series Router.

This chapter includes the following sections:

• Release History

• Supported Features

• Supported MIBs

• SPA Architecture

• Displaying the SPA Hardware Type

Release History

Table 3-1 provides the release and modification history for Ethernet SPA-related features and enhancements on the Cisco XR 12000 Series Router.

Table 3-1 Release History for Ethernet SPA 

Release	Modification
Cisco IOS-XR Release 3.2	Support for the following SPAs was introduced on Cisco XR 12000 Series Routers: •1-Port 10-Gigabit Ethernet SPA •5-Port Gigabit Ethernet SPA •10-Port Gigabit Ethernet SPA

Supported Features

This section provides a list of some of the primary features supported with the Gigabit Ethernet.

Gigabit Ethernet SPA Features

The following is a list of some of the significant hardware and software features supported by the Gigabit Ethernet SPAs on the Cisco XR 12000 Series Routers:

•Auto negotiation

•Full-duplex operation

•802.1Q VLAN termination

•Jumbo frames support (9188 bytes)

•Support for command-line interface (CLI) controlled OIR

•802.3x flow control

•Up to 4K VLAN per SPA

•Up to 5K Mac Accounting Entries per SPA (Source Mac Accounting on the ingress and Destination Mac Accounting on the egress)

•Up to 2K MAC address entries for destination MAC address filtering per SPA, and up to 1K MAC address filtering entries per port

•Per port byte and packet counters for policy drops, oversubscription drops, CRC error drops, packet sizes, Unicast, multicast, and broadcast packets

•Per VLAN byte and packet counters for policy drops, oversubscription drops, Unicast, multicast, and broadcast packets

•Per-port byte counters for good bytes and dropped bytes

•Ethernet over Multi-protocol Label Switching (EoMPLS)

•Quality of service (QoS)

•Hot Standby Router Protocol (HSRP)

•Virtual Router Redundancy Protocol (VRRP)

Supported MIBs

The following MIBs are supported by the Gigabit Ethernet SPAs on the Cisco XR 12000 Series Routers:

•Entity-MIB (RFC 2737)

•Cisco-entity-asset-MIB

•Cisco-entity-field-replaceable unit (FRU)-control-MIB

•Cisco-entity-alarm-MIB

•Cisco-entity-sensor-MIB

•IF-MIB

•Etherlike-MIB (RFC 2665)

•Remote Monitoring (RMON)-MIB (RFC 1757)

•Cisco-class-based-QoS-MIB

•MPLS-related MIBs

•Ethernet MIB/RMON

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 Gigabit Ethernet 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.

Every incoming and outgoing packet on the Gigabit Ethernet SPAs goes through the physical (PHY) SFP optics, Media Access Control (MAC), and ASIC devices.

Path of a Packet in the Ingress Direction

The following steps describe the path of an ingress packet through the Gigabit Ethernet SPAs:

1. The PHY SFP optics device receives incoming frames on a per-port basis from one of the laser optic interface connectors.

2. The PHY laser optics device processes the frame and sends it over the XAUI path to the MAC device.

3. The MAC device receives the frame, strips the CRCs, and sends the packet via the SPI 4.2 bus to the ASIC.

4. The ASIC takes the packet from the MAC devices and classifies the ethernet information. CAM lookups based on etype, port, VLAN, and source and destination address information determine whether the packet is dropped or forwarded to the SPA interface. If the packet is forwarded to the SPA interface, an 8-byte SHIM header that is used for additional downstream packet processing is propounded to the packet.

Path of a Packet in the Egress Direction

The following steps describe the path of an egress packet from the SIP through the Gigabit Ethernet SPA:

1. The packet is sent to the ASIC using the SPI 4.2 Bus. The packets are received with layer 2 and layer 3 headers in addition to the packet data.

2. The ASIC uses port number, destination MAC address, destination address type, and VLAN ID to perform parallel CAM lookups. If the packet is forwarded, it is forwarded via the SPI 4.2 Bus to the MAC device.

The MAC device forwards the packets to the PHY laser optic interface, which transmits the packet.

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. For more information about these commands, see Chapter 10, "Command Reference."

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

•show inventory

•show hw-module subslot brief

Table 3-2 shows the hardware description that appears in the show command output for each type of Gigabit Ethernet SPA that is supported on Cisco XR 12000 Series Routers.

Table 3-2 SPA Hardware Descriptions in show Commands 

SPA	Description in show commands
1-Port 10-Gigabit Ethernet SPA	Hardware is GigMac 1 Port 10 GigabitEthernet
5-Port Gigabit Ethernet SPA	Hardware is FiveGigE
10-Port Gigabit Ethernet SPA	Hardware is TenGigE

Example of the show inventory Command

The following example shows output from the show inventory command on a Cisco XR 12000 Series Router with an 1-Port 10-Gigabit Ethernet SPA installed in subslot 1 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 3-3 describes the significant fields shown in the display.

Table 3-3 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 10GbE Shared Port Adapter XFP base" indicates the 1-Port 10-Gigabit Ethernet 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 subslot Command

The following example shows output from the show hw-module subslot brief command on a Cisco XR 12000 Series Router with an 1-Port 10-Gigabit Ethernet SPA installed in subslot 1 of the Cisco 12000 SIP-600 in slot 3:

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




Use the format show hw-module subslot 0/3/cpu0 brief to display information regarding all SPAs installed in the card in slot 3.

Table 3-4 describes the significant fields shown in the display.

Table 3-4 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.

Posted: Mon Jan 9 20:24:33 PST 2006
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