Overview: PA-FC-1G
This chapter describes the PA-FC-1G and contains the following sections:
•
PA-FC-1G Fibre Channel Port Adapter Overview
•LEDs
•PA-FC-1G Slot Locations on the Supported Platforms
•Identifying Interface Addresses
Fibre Channel Overview
The Fibre Channel over TCP/IP (FCIP) is a tunneling protocol that connects geographically distributed fibre channel storage area networks (SANs) transparently over local area networks (LANs), metropolitan area networks (MANs), and wide area networks (WANs). (See Figure 1-1.)
Figure 1-1 FC SAN Traffic Over an IP Network
The Transmission Control Protocol (TCP) handles congestion control and congestion management, and data error recovery and data loss recovery for FCIP. TCP/IP handles transportation for FCIP, while maintaining fibre channel (FC) services.
PA-FC-1G Fibre Channel Port Adapter Overview
The PA-FC-1G is a single-width, Peripheral Component Interconnect (PCI) port adapter designed to tunnel fibre channel frames through TCP connections, guaranteeing reliable transport of SAN traffic over IP-based WANs.
The PA-FC-1G provides a one gigabit (1Gb) fibre channel interface to the external networks and a single PCI interface into 7200 VXR and 7401ASR routers. (See Figure 1-2.) It offers an alternative technology to carry SAN traffic over long distances without requiring a dedicated fibre channel network.
Figure 1-2 PA-FC-1G—Faceplate View
The PA-FC-1G complies with the environmental specifications listed in Table 1-1.
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|
|---|---|
Operating temperature |
50 to 104oF (10 to 40oC) |
Humidity |
0 to 90%, noncondensing |
LEDs
The PA-FC-1G has three LEDs to indicate port adapter status, fibre channel activity, and the status of the fibre channel link. (See Figure 1-3.)
Figure 1-3 LEDs on the PA-FC-1G
After system initialization, the Status LED goes on to indicate that the PA-FC-1G has been recognized by the system.
The following conditions must be met before the PA-FC-1G is enabled:
•The PA-FC-1G is correctly connected and is receiving power.
•A valid system software image for the PA-FC-1G has been downloaded successfully.
•The system recognizes the installed PA-FC-1G.
If any of these conditions are not met, or if the initialization fails for other reasons, the PA-FC-1G will not be operational.
Table 1-2 lists LED colors and indications.
Cables and Connectors
A small form-factor pluggable (SFP) module plugs into the FC port on the PA-FC-1G. The FC port is a 1000-Mbps optical interface in the form of an LC-type duplex port that supports IEEE 802.3z interfaces. The SFP is compliant with the 1000BASEX standard and the IEEE Fibre Channel 2nd Generation Physical Interface standard. The SFP (product ID SFP-FCPA-LC-1G=) ships installed in the PA-FC-1G and can be ordered as a spare.
An appropriate fibre-optic cable with an LC connector must be plugged into an SFP on the PA-FC-1G. If the SAN switch to which the PA-FC-1G is being connected has an SFP module installed, an LC-to-LC fibre-optic cable is recommended. If the SAN switch has a GBIC module, use an LC-to-SC fibre-optic cable.
Table 1-3 describes the features and operating distances of the SFP.
Table 1-4 shows the port cabling specifications of the SN-SFP-FCGEMM-LC.
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|
|
|
|
|
|---|---|---|---|---|
850 |
MMF1 |
62.5 |
160 |
722 ft (220 m) |
62.5 |
200 |
902 ft (275 m) |
||
50.0 |
400 |
1640 ft (500 m) |
||
50.0 |
500 |
1804 ft (550 m) |
1 Multimode fiber (MMF) only. |
PA-FC-1G Slot Locations on the Supported Platforms
This section discusses the PA-FC-1G slot locations on the supported platforms. The illustrations that follow summarize slot location conventions on each platform:
•Cisco 7200 VXR Routers Slot Numbering
•Cisco 7401ASR Router Slot Numbering
Cisco 7200 VXR Routers Slot Numbering
The Cisco 7204VXR has four slots (slot 1 through slot 4) for port adapters. Port adapter slot 0 is reserved for an I/O controller. You can place the port adapters in any of the four available port adapter slots. (See Figure 1-4.)
Figure 1-4 Port Adapter Slots in the Cisco 7204VXR
The Cisco 7206VXR has six slots (slot 1 through slot 6) for port adapters. Port adapter slot 0 is reserved for an I/O controller. You can place the port adapters in any of the six available port adapter slots. (See Figure 1-5.)
Load-Balancing Considerations
There are two PCI buses in a 7200 VXR router. Even-numbered slots are on one PCI bus and odd-numbered slots are on the other PCI bus.
If the IP connection is established using an Ethernet interface on the I/O controller, this interface shares the PCI bus of odd-numbered slots. In this case, the PA-FC-1G achieves best performance when it is installed in an even-numbered slot.
If the IP connection is established using an interface in one of the available port adapter slots, the PA-FC-1G achieves best performance when it is installed on a different PCI bus from the port adapter through which an IP connection is established. For example, if an Ethernet port adapter is installed in slot 2 (IP connection), it is best to install the PA-FC-1G in slot 1, 3, or 5 (fibre channel connection).
Figure 1-5 Port Adapter Slots in the Cisco 7206VXR
Cisco 7401ASR Router Slot Numbering
Figure 1-6 shows the front view of the Cisco 7401ASR router with a port adapter installed. The single slot in a 7401ASR router is located on the left side of the router.
Figure 1-6 Cisco 7401ASR Router with a Port Adapter Installed
Identifying Interface Addresses
This section describes how to identify the interface addresses for port adapters in supported platforms. Interface addresses specify the actual physical location of each interface on a router or switch.
Interfaces on the port adapter installed in a router maintain the same address regardless of whether other port adapters are installed or removed. However, when you move a port adapter to a different slot, the first number in the interface address changes to reflect the new port adapter slot number.
The following subsections describe the interface address formats for specific platforms:
•Interface Addresses of Cisco 7200 VXR Routers
•Interface Addresses of Cisco 7401ASR Router
Interface Addresses of Cisco 7200 VXR Routers
In Cisco 7200 VXR routers, slots are numbered from the lower left to the upper right, beginning with slot 1 and continuing through slot 4 for the Cisco 7204VXR, and slot 6 for the Cisco 7206VXR. (Slot 0 is reserved for the I/O controller.)
The interface address is composed of a two-part number in the format slot/port-number. The interface addresses of a 4-port port adapter installed in slot 1 would be 1/0 through 1/3 (slot 1 and port 0 through port 3). If the 4-port port adapter were installed in slot 4, these same interfaces would be numbered 4/0 through 4/3 (slot 4 and port 0 through port 3).
Interface Addresses of Cisco 7401ASR Router
There is only one slot on the Cisco 7401ASR router that accepts port adapters and it is numbered as slot 1. The interface address is composed of a two-part number in the format slot/port-number. For example, if a single-port port adapter is installed on a Cisco 7401ASR router, the interface address would be 1/0.
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