Specifications

3-4
Cisco XR 12000 Series Router SIP and SPA Software Configuration Guide, Release 3.2
Release 3.2, OL-6396-01, Rev.A1 January 9, 2006
Chapter 3 Overview of the Gigabit Ethernet SPAs
Displaying the SPA Hardware Type
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.
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 3-2 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