Users Guide

● QSFP28 ports in 2x16GFC mode support 32GFC oversubscription. SFP+ port groups in 2x16GFC mode do not support
32GFC oversubscription. 2x16GFC mode activates subports 1 and 3.
● QSFP28 ports in 4x16GFC mode support 32GFC oversubscription.
Breakout interfaces:
● To configure breakout interfaces on a unified port, use the mode {FC | Eth} command in Port-Group Configuration
mode. The mode {FC | Eth} command configures a unified port to operate at line rate and guarantees no traffic loss.
● To configure breakout interfaces on a QSFP+ Ethernet port, use the interface breakout command in global
Configuration mode.
1GE mode: Only SFP+ ports support 1GE; QSFP+ and QSFP28 ports 25 to 30 do not support 1GE.
To view the ports that belong to each port group, use the show port-group command.
Configure negotiation modes on interfaces
On OS10, the auto negotiation mode is enabled by default.
To force negotiation, use the following command:
negotiation on
To disable negotiation, use the following command:
negotiation off
To reset the negotiation mode to the default setting of the media you use, use one of the following commands:
negotiation auto
no negotiation
The following examples show that the nondefault configuration is added to the running configuration:
OS10(conf-if-eth1/1/50)# negotiation off
OS10(conf-if-eth1/1/50)# show configuration
!
interface ethernet1/1/50
no shutdown
switchport access vlan 1
negotiation off
flowcontrol receive on
OS10(conf-if-eth1/1/50)# negotiation on
OS10(conf-if-eth1/1/50)# show configuration
!
interface ethernet1/1/50
no shutdown
switchport access vlan 1
negotiation on
flowcontrol receive on
The following examples show that the default configuration is not added to the running configuration:
OS10(conf-if-eth1/1/50)# negotiation auto
OS10(conf-if-eth1/1/50)# show configuration
!
interface ethernet1/1/50
no shutdown
switchport access vlan 1
flowcontrol receive on
The following example shows that the no negotiation command resets the interface to the default setting of the media
used.
OS10(conf-if-eth1/1/50)# no negotiation
OS10(conf-if-eth1/1/50)# show configuration
Interfaces
265