Chapter 5
Configuring Gigabit Ethernet Switching
Enabling Port Negotiation on Gigabit Ethernet Ports
Note
You cannot enable port negotiation on 1000BASE-T Gigabit Ethernet ports in this release. If a
1000BASE-T GBIC (Gigabit Interface Converter) is inserted in the port that was previously configured
as negotiation disabled, the negotiation disabled setting is ignored and the port operates in
negotiation-enabled mode.
To enable port negotiation on a 1000BASE-X Gigabit Ethernet port, perform this task in privileged
mode:
Task
Step 1
Enable Gigabit Ethernet port negotiation.
Step 2
Verify the port negotiation configuration.
This example shows how to enable port negotiation and verify the configuration:
Console> (enable) set port negotiation 2/1 enable
Port 2/1 negotiation enabled
Console> (enable) show port negotiation 2/1
Port
-----
2/1
Console> (enable)
Disabling Port Negotiation
To disable port negotiation on a 1000BASE-X Gigabit Ethernet port, perform this task in privileged
mode:
Task
Step 1
Disable Gigabit Ethernet port negotiation.
Step 2
Verify the port negotiation configuration.
This example shows how to disable port negotiation and verify the configuration:
Console> (enable) set port negotiation 2/1 disable
Port 2/1 negotiation disabled
Console> (enable) show port negotiation 2/1
Port
-----
2/1
Console> (enable)
Configuring errdisable State Gigabit Ethernet Port Timeout Periods
For information on configuring a timeout period for ports in errdisable state, see
Ethernet and Fast Ethernet Switching."
78-15486-01
Link Negotiation
----------------
enabled
Link Negotiation
----------------
disabled
Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide
Configuring Gigabit Ethernet Ports
Command
set port negotiation mod_num/port_num enable
show port negotiation [mod_num/port_num]
Command
set port negotiation mod_num/port_num disable
show port negotiation [mod_num/port_num]
Chapter 4, "Configuring
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Release 8.1
5-9