Table Of Contents
Overview of the Gigabit Ethernet SPAs
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 interfaces Command
Overview of the Gigabit Ethernet SPAs
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 12000 series router.
This chapter includes the following sections:
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Displaying the SPA Hardware Type
Release History
Table 4-1 provides the release and modification history for Ethernet SPA-related features and enhancements on the Cisco 12000 series router.
Table 4-1 Release Historyfor Ethernet SPAs
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 12000 series routers:
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Supported MIBs
The following MIBs are supported by the Gigabit Ethernet SPAs on the Cisco 12000 series routers:
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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:
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:
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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:
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Displaying the SPA Hardware Type
To verify the SPA hardware type that is installed in your Cisco 12000 series router, you can use the show interfaces command. For more information about these commands, see Chapter 19, "SIP and SPA Command Reference."
Table 4-2 shows the hardware description that appears in the show command output for each type of Gigabit Ethernet SPA that is supported on Cisco 12000 series routers.
Example of the show interfaces Command
The following example shows output from the show interfaces fastethernet command on a Cisco 12000 series router with a 1-Port 10-Gigabit Ethernet SPA installed in slot 3:
Router# show interfaces gigabitethernet 3/0/0GigabitEthernet3/0/0 is up, line protocol is upHardware is GigMac 1 Port 10 GigabitEthernet, address is0008.7db3.8dfe(bia )Internet address is 10.0.0.2/24MTU 1500 bytes, BW 10000000 Kbit, DLY 10 usec, rely 255/255, load 1/255Encapsulation ARPA, loopback not set...