Cisco Catalyst 4500 Series, Software Configuration Manual

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Catalyst 4500 Series Switch, Cisco IOS Software Configuration Guide - Cisco IOS XE 3.9.xE and IOS
Chapter 9 Configuring Interfaces
Deploying 10-Gigabit Ethernet or Gigabit Ethernet Ports
Deploying 10-Gigabit Ethernet or Gigabit Ethernet Ports
To increase the flexibility of X2 ports, the Catalyst 4500 series switch as well as Catalyst 4900M and Catalyst 4948E support
TwinGig Convertor modules. When you plug a TwinGig Convertor module into an X2 hole, it converts a single X2 hole
(capable of holding one pluggable X2 optic) into two SFP holes (capable of holding two pluggable SFP optics). This enables
you to have 10-Gigabit ports and 1-Gigabit ports on the same line card. It also allows you to use Gigabit ports, and then switch
to a 10-Gigabit port, when needed.
This section includes these topics:
• Port Numbering TwinGig Convertors, page 9-13
•
Limitations on Using a TwinGig Convertor, page 9-13
• Selecting X2/TwinGig Convertor Mode, page 9-14
Port Numbering TwinGig Convertors
When a TwinGig Convertor is enabled or disabled, the number and type of ports on the line card change dynamically. The
terminology must reflect this behavior. In Cisco IOS, 10-Gigabit ports are named
10-Gigabit and 1-Gigabit ports are named
Gigabit . Starting with Cisco IOS Release 12.2(40)SG, to avoid having two ports named 10-Gigabit1/1 and Gigabit1/1, the
10-Gigabit and 1-Gigabit port numbers are independent. For example, for a WS-X4606-10GE-E module with six X2 holes, the
X2 ports are named
10-Gigabit slot-num/<1-6> , and the SFP ports are named Gigabit slot-num/<7-18> .
Figure 9-3 Faceplate for WS-X4606-10GE
In Cisco IOS, ports 1 through 18 always exist. This means that you can apply configurations on them and they display in the
CLI output. However, only the X2 or the SFP ports can be active at any particular time. For example, if an X2 is plugged into
the second hole, the X2 port 2 is active and SFP ports 9 and 10 are inactive. If a TwinGig Convertor is plugged into the second
hole, the X2 port 2 is inactive, and the SFP ports 9 and 10 are active. The inactive ports are treated analogously to the inactive
ports on Supervisor Engines IV and V-10GE, where at no time are all of the uplinks connected to the switching ASICs.
Note
When using both TwinGig and X2 transceivers on the WS-X4606-X2-E module, place ports 1-3 in one
group and ports 4-6 in another. (The mode selected with the
show hw-module module port-group
command determines the behavior. See “Selecting X2/TwinGig Convertor Mode” .) Mixing within a port
group does not work. For example, you cannot have an X2 in port 1 and a TwinGig in port 2 and expect
both of them to function.
Limitations on Using a TwinGig Convertor
Supervisor Engine 6-E, Supervisor Engine 6L-E, and Catalyst 4900M connect ports to the switching engine through a stub
ASIC. This stub ASIC imposes some limitations on the ports: Gigabit and 10-Gigabit ports cannot be mixed on a single stub
ASIC; they must either be all 10-Gigabit Ethernet (X2), or all Gigabit (TwinGig Converter and SFP). The faceplates of X2
modules show this stub port grouping, either with actual physical grouping with a box drawn around a grouping.
1 X2
SFP
Status
7 8 9 10 11 12
231562
2 3 4 X2
SFP 13 14 15 16 17 18
5 6