Chapter 11
| Interface Commands
Interface Configuration
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Default Setting
SFP/SFP+ ports: None
Combination ports
10
: copper-forced
Command Mode
Interface Configuration (Ethernet)
Command Usage
Available sfp-forced modes include:
ECS4120-52T: Ports 49-52 (10G SFP+) support 1000sfp
ECS4120-28T/P: Ports 25-28 (10G SFP+) support 1000sfp
ECS4120-28F/28F-I: Ports 25-28 (10G SFP+) support 1000sfp
Ports 1-24 (1000BASE SFP) support 1000sfp or 100fx
Example
This forces the switch to use the 1000sfp mode for SFP port 28.
Console(config)#interface ethernet 1/28
Console(config-if)#media-type sfp-forced 1000sfp
Console(config-if)#
negotiation This command enables auto-negotiation for a given interface. Use the no form to
disable auto-negotiation.
Syntax
[no] negotiation
Default Setting
Enabled
Command Mode
Interface Configuration (Ethernet, Port Channel)
Command Usage
◆ 1000BASE-T does not support forced mode. Auto-negotiation should always be
used to establish a connection over any 1000BASE-T port or trunk.
◆ The 10GBASE-SFP+ transceivers do not support auto-negotiation. Forced mode
should always be used to establish a connection over any 10GBASE-SFP port or
trunk.
◆ When auto-negotiation is enabled
11
the switch will negotiate the best settings
for a link based on the capabilities command. When autonegotiation is
disabled, you must manually specify the link attributes with the speed-duplex
and flowcontrol commands.
11. Support for auto-negotiation depends on transceiver type, such as 1G SFP.
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