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Data Center Switching

Cisco Catalyst 6500 Series 8-Port 10 Gigabit Ethernet Module QA

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Features and Benefits

Q. What new features does the Cisco ® Catalyst ® 6500 Series 8-Port 10 Gigabit Ethernet Module support besides higher density?
A. It supports the features described in Table 1.

Table 1. New Features on Catalyst® 6500 8-port 10 Gigabit Ethernet Module

New Feature

Description

Benefits

Increased port buffering

From

4-port 10 GbE module: 16MB per port

To

8-port 10 GbE module: 200 MB per port

Better congestion management

New scheduler

Shaped Round Robin (SRR) in egress

More efficient handling of bursty traffic

New queuing mechanism

Differentiated services code point (DSCP)-based queue mapping

Allows both ingress and egress queuing based on Layer3 TOS and provides more granular classes of traffic

Increased memory

Default 1GB DRAM

Storage of larger forwarding table

Specifications

Q. What are the power requirements of the 8-port 10 Gigabit Ethernet modules?
A. The power requirements are as follows:

• 8 port 10 Gigabit Ethernet module with DFC3C (WS-X6708-10G-3C): 444.36W (10.58A @ 42V)

[Base module: 375W (8.93A @ 42V), DFC3C: 69.3W (1.65A @ 42V)]

• 8 port 10 Gigabit Ethenret module with DFC3CXL (WS-X6708-10G-3CXL): 473.76W (11.28A @ 42V)

[Base module: 375W (8.93A @ 42V), DFC3CXL: 98.7W (2.35A @ 42V)]

Q. What is the performance of the 8-port 10 Gigabit Ethernet module?
A. The 8-port 10GbE module has 40 Gbps connection to the fabric and can demonstrate up to 64 Gbps local switching. The distributed forwarding card (DFC) can forward traffic at 48 Mpps.
Q. Is the 8-port 10 Gigabit Ethernet module not oversubscribed if I only use half the ports?
A. Yes, you can use only ports 1, 2, 5, and 6 to provide 40 Gbps local switching. To make it easier for you to configure your network, we have a new software command for you to go into performance mode. The software command
router(config)#[no] hw-module slot x oversubscription

will administratively disable the oversubscribed ports (ports 3, 4, 7, and 8) and put them in "shutdown" state. In this mode, the user cannot do "no shut" on the disabled ports. When user do "show interface" on the disabled ports, the output will show "disabled for performance" to distinguish between normal port shutdown and shutdown for performance.

Q. How much memory comes by default on this module?
A. Both the WS-X6708-10G-3C and WS-X6708-10G-3CXL come with 1 GB DRAM.

Distributed Forwarding Card (DFC)

Q. What is the difference between WS-X6708-10G-3C and WS-X6708-10G-3CXL?
A. Both modules offer 8 ports of 10 Gigabit Ethernet and share the same base board, WS-X6708-10GE. WS-X6708-10G-3C comes with distributed forwarding card 3C (WS-F6700-DFC3C), and WS-X6708-10G-3CXL comes with distributed forwarding card 3CXL (WS-F6700-DFC3CXL).
Q. What is the difference between DFC3C and DFC3CXL?
A. DFC3CXL offers more scalability in terms of routes and NetFlow entries supported compared with DFC3C (Table 2).

Table 2. Feature differences between DFC3C and DFC3CXL

Feature

DFC3C

DFC3CXL

IPv4 routes

256,000

1,000,000

IPv6 routes

128,000

500,000

NetFlow Entries

128,000

256,000

Reflexive access control lists (ACLs)

128,000

256,000

Q. Will you be introducing an 8-port 10 Gigabit Ethernet module without the DFC?
A. The 8-port 10 Gigabit Ethernet module has a 40-Gbps connection to the fabric. For such a high-density 10 Gigabit Ethernet module, most of our customers would like to use it with the DFC to maximize switching performance. There is no plan to introduce an 8-port 10 Gigabit Ethernet module without the DFC.
Q. Can we mix these 10 Gigabit Ethernet modules and other modules with centralized forwarding card (CFC) or other DFCs in the same chassis?
A. Yes, we will support a mix of DFC and CFC in the same chassis. The chassis will operate in the mode of the lowest common denominator (Table 3).

Table 3. Chassis Mode of Operation with mixed Supervisor Engines and DFCs

 

DFC3A

DFC3B

DFC3BXL

DFC3C

DFC3CXL

Supervisor Engine 720-3A

PFC3A functionality

PFC3A functionality

PFC3A functionality

PFC3A functionality

PFC3A functionality

Supervisor Engine 720-3B

PFC3A functionality

PFC3B functionality

PFC3B functionality

PFC3B functionality

PFC3B functionality

Supervisor Engine 720-3BXL

PFC3A functionality

PFC3B functionality

PFC3BXL functionality

PFC3B functionality

PFC3BXL functionality

Q. What new functions does DFC3C support?
A. DFC3C supports all functions of DFC3B. Since a PFC3C based supervisor engine is not yet available, a DFC3C will operate like a DFC3B in your system at this point in time.
Q. I have purchased WS-X6708-10G-3C and would like to upgrade it to DFC3CXL. Is this field upgradable?
A. Customers can purchase WS-F6700-DFC3CXL= to field upgrade WS-X6708-10G-3C to WS-X6708-10G-3CXL. WS-F6700-DFC3CXL= would be available with the next Cisco IOS ® Software release, targeting 1HCY07. WS-F6700-DFC3CXL= upgrade kit comes with both the DFC3CXL daughter board as well as 1 GB DRAM. Since WS-X6708-10G-3C already comes with 1G DRAM as default, the 1 GB DRAM kit does not need to be installed on the WS-X6708-10G-3C for the DFC upgrade.
Q. Since I do not need the 1 GB DRAM that comes with the DFC3CXL upgrade kit, can I use that on other modules?
A. Yes, you can.

Chassis/Supervisor/Software Interoperability

Q. Which chassis supports the 8-port 10 Gigabit Ethernet module? Are there any limitations?
A. All Catalyst 6500 chassis and 7600 chassis support the 8-port 10 Gigabit Ethernet module. When operating in an E-Series chassis (6503-E, 6504-E, 6506-E, 6509-E), the 6509-NEB-A chassis with dual fan tray, or Cisco 7604 chassis, 7609 chassis with dual fan tray, the configuration is NEBS 3 compliant (supports operating temperatures up to 55°C). When operating in a non-E-Series chassis (6506, 6509, 6513), 6509-NEB-A chassis with single fan tray, or Cisco 7606/7613 chassis, 7609 chassis with single fan tray, fan tray 2 and 2500W or higher power supplies are required, and the configuration is not NEBS 3 compliant (supports operating temperatures up to 40°C only). This module is not supported in the Catalyst 6503 non-E Series chassis.
Q. Which supervisor engine supports the 8-port 10 Gigabit Ethernet module?
A. The 8-port 10 Gigabit Ethernet module works with any Supervisor Engine 720, including WS-Sup720, WS-Sup720-3B, and WS-Sup720-3BXL.
Q. Which software supports the 8-port 10 Gigabit Ethernet module?
A. It is supported on Cisco IOS Software Release 12.2(18)SXF5 for both the Catalyst 6500 Series and 7600 Series Routers. Refer to Release 12.2SX release notes for more details: http://www.cisco.com/univercd/cc/td/doc/product/lan/cat6000/122sx/ol_4164.htm

Optics

Q. What optics are available for the 8-port 10 Gigabit Ethernet module at FCS?
A. The following optics are supported on the 8-port 10 Gigabit Ethernet module at FCS:

X2-10GB-SR: 26m over FDDI grade MMF, 300m over 50-micron 2000 MHz*km MMF

X2-10GB-LR: 10km over SMF

X2-10GB-ER: 40km over SMF

X2-10GB-LX4: 300m over FDDI grade MMF

X2-10GB-CX4: 15m over 8-pair 100-Ohm Infiniband cable

Only the -02 version or later of the above optics is supported on this 8-port 10 Gigabit Ethernet module. The -01 version of the optics is not supported. This restriction does not apply to X2-10GB-LRM.
Q. How do I order the -02 version of these X2 modules?
A. All SR, LR, ER, LX4, CX4 X2 modules shipped after the 8-port 10 Gigabit Ethernet module FCSed are -02 version or later. You can order the above X2 modules using the normal ordering process and will get the -02 version or later of these X2 modules.
Q. I already have some Cisco X2 modules. How can I check their version?
A. The version number is the last two digits of the Cisco part number. The Cisco part number is the second line on the label, shown in Figure 1 as 10-XXXX-XX.

Figure 1. Cisco Part Number on Cisco X2 modules

Q. What is the difference between -01 and -02 version of the X2 modules?
A. The -02 version of the SR, LR, ER, LX4, CX4 X2 modules has EMI improvements and latch improvements over the -01 version.
Q. Given that the 8-port 10 Gigabit Ethernet module has X2 optics, can I connect a device that supports XENPAK optics?
A. X2 and XENPAK optics differ in form factor only. You can connect an X2 to a XENPAK as long as the optics are of the same transceiver type.

For More Information

For more information about Cisco Catalyst 6500 Series Switches, visit http://www.cisco.com/en/US/products/hw/switches/ps708/index.html or contact your local account representative.