Cisco Catalyst 4500 Series - Limitations on Using a Twingig Convertor

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Software Configuration Guide—Release IOS XE 3.3.0SG and IOS 15.1(1)SG
OL-25340-01
Chapter 7 Configuring Interfaces
Deploying 10-Gigabit Ethernet or Gigabit Ethernet Ports
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.
Selecting X2/TwinGig Convertor Mode
The default configuration mode is X2. If you plan to deploy 10-Gigabit Ethernet interfaces, you do not
need to configure anything. However, if you want to deploy Gigabit interfaces (that is, use TwinGig
Convertors), you must configure the associated port-group:
To determine how the X2 holes on a module are grouped, enter the show hw-module module m
port-group p command.
Note Place a 10-Gigabit Ethernet port that accepts CVR-X2-SFP into 1-Gigabit mode instead of
10-Gigabit Ethernet mode.
If you configure a 10-Gigabit Ethernet port as 1-Gigabit port, an output similar to the following
appears:
Switch# show hw-module module 5 port-group
Module Port-group Active Inactive
-------------------------------------------------------------
5 1 Gi5/3-6 Te5/1-2
If the port is set to the default, 10-Gigabit Ethernet mode, an output similar to the following appears:
Switch# show hw-module module 6 port-group
Module Port-group Active Inactive
-------------------------------------------------------------
6 1 Te6/1-2 Gi6/3-6
Switch# show int status mod 1
Port Name Status Vlan Duplex Speed Type
Te1/1 notconnect 1 full 10G 10GBase-LR
Te1/2 connected 1 full 10G 10GBase-LR
Te1/3 notconnect 1 full 10G No X2
Te1/4 notconnect 1 full 10G No X2
Te1/5 notconnect 1 full 10G No X2
Te1/6 notconnect 1 full 10G No X2
Gi1/7 inactive 1 full 1000 No Gbic
Gi1/8 inactive 1 full 1000 No Gbic
Gi1/9 inactive 1 full 1000 No Gbic
Gi1/10 inactive 1 full 1000 No Gbic
Gi1/11 inactive 1 full 1000 No Gbic
Gi1/12 inactive 1 full 1000 No Gbic
Gi1/13 inactive 1 full 1000 No Gbic
Gi1/14 inactive 1 full 1000 No Gbic
Gi1/15 inactive 1 full 1000 No Gbic
Gi1/16 inactive 1 full 1000 No Gbic
Gi1/17 inactive 1 full 1000 No Gbic
Gi1/18 inactive 1 full 1000 No Gbic
Switch#