Limitations On Using A Twingig Convertor - Cisco Catalyst 4500 Series Configuration Manual

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:
Note
Software Configuration Guide—Release IOS XE 3.3.0SG and IOS 15.1(1)SG
7-14
To determine how the X2 holes on a module are grouped, enter the show hw-module module m
port-group p command.
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
-------------------------------------------------------------
5 1 Gi5/3-6
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
-------------------------------------------------------------
6 1 Te6/1-2
Switch# show int status mod 1
Port Name
Te1/1
Te1/2
Te1/3
Te1/4
Te1/5
Te1/6
Gi1/7
Gi1/8
Gi1/9
Gi1/10
Gi1/11
Gi1/12
Gi1/13
Gi1/14
Gi1/15
Gi1/16
Gi1/17
Gi1/18
Switch#
Inactive
Te5/1-2
Inactive
Gi6/3-6
Status Vlan
notconnect 1
connected 1
notconnect 1
notconnect 1
notconnect 1
notconnect 1
inactive 1
inactive 1
inactive 1
inactive 1
inactive 1
inactive 1
inactive 1
inactive 1
inactive 1
inactive 1
inactive 1
inactive 1
Chapter 7 Configuring Interfaces
Duplex Speed Type
full 10G 10GBase-LR
full 10G 10GBase-LR
full 10G No X2
full 10G No X2
full 10G No X2
full 10G No X2
full 1000 No Gbic
full 1000 No Gbic
full 1000 No Gbic
full 1000 No Gbic
full 1000 No Gbic
full 1000 No Gbic
full 1000 No Gbic
full 1000 No Gbic
full 1000 No Gbic
full 1000 No Gbic
full 1000 No Gbic
full 1000 No Gbic
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