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Figure 5.
dCEF256 Gigabit Ethernet Optical Interface Modules WS-X6816-GBIC
Cisco Catalyst 6500 Series CEF256 Gigabit Ethernet Mixed Media Interface Modules
Designed for data center and server farm applications, Cisco Catalyst CEF256 optical interface
modules provide line-rate Gigabit Ethernet forwarding with the following operational advantages:
Backplane connection: Connects to the switch fabric using one 8 Gbps full-duplex
●
connection as well as supporting a connection to the 32 Gbps shared bus
Slot requirements: Can occupy any slot in any Catalyst 6500 Series chassis
●
Supervisor engine: Supported by the Supervisor Engine 1A, Supervisor Engine 2,
●
Supervisor Engine 32, or Supervisor Engine 720
Base forwarding mode and performance: Uses the central CEF engine located on the
●
supervisor engine to forward packets up to 30 Mpps per system in the interface module's
base configuration
Distributed forwarding upgrade option and performance: When equipped with the
●
optional field-upgradeable WS-F6K-DFC or WS-F6K-DFC3 dCEF forwarding daughter cards,
the interface module delivers optimal performance, up to a sustained 15 Mpps per slot;
requires a switch fabric equipped chassis using either the SFM/SFM2 with a Supervisor
Engine 2 with MSFC2 or the Supervisor Engine 720
Optics: Supports hot-pluggable gigabit interface converters (GBICs)
●
Note:
Supervisor Engine 720 communicates with a CEF256 interface module in 256 Gbps mode.
The SFM is not required when using the Supervisor Engine 720.
Table 4.
CEF256 Gigabit Ethernet Optical Interface Modules
Transceiver
Product
Type
WS-X6516A-GBIC
GBIC
WS-X6516-GBIC
GBIC
* Queues Legend: 1p3q1t = 1 priority queue, 3 round robin queues, 1 threshold
Figure 6.
CEF256 Gigabit Ethernet Optical Interface Modules
Ports/Interface/Connectors
16 ports; 1000BASE-SX, -LX/LH, -
ZX, T; 1000BASE-CWDM,
DWDM; SC connecter
16 ports; 1000BASE-SX, -LX/LH, -
ZX, -T; 1000BASE-CWDM, -
DWDM; SC connecter
Port
Maximum Frame
Density/Chassis
Size (Jumbo
Model
Frame) Support
● 192 ports/6513
Up to 9216
bytes/frame
● 128 ports/6509
● 192 ports/6513
Up to 9216
bytes/frame
● 128 ports/6509
Page 7 of 13
Data Sheet
Queues per
Port (Tx =
Transmit, Rx
= Receive)*
● Tx-1p2q2t
● Rx-1p1q4t
● Tx-1p2q2t
● Rx-1p1q4t