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Valid auto-negotiation and speed configurations

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The table below summarizes all possible settings of speed and duplex for Sensors and Cisco catalyst switch ports.

Speed Configurations

Trellix IPS Configuration 10/100/1000 port (Speed/Duplex)

Configuration of Switch

(Speed/Duplex)

Resulting Sensor

(Speed/Duplex)

Resulting Catalyst

(Speed/Duplex)

Comments

100 Mbps

Full-duplex

1000 Mbps

Full-duplex

No Link

No Link

Neither side establishes link due to speed mismatch

100 Mbps

Full-duplex

AUTO

100 Mbps

Full-duplex

100 Mbps

Full-duplex

Correct configuration

100 Mbps

Full-duplex

1000 Mbps

Full-duplex

100 Mbps

Full-duplex

100 Mbps

Full-duplex

Correct Manual Configuration

100 Mbps

Half-duplex

AUTO

100 Mbps

Half-duplex

100 Mbps

Half-duplex

Link is established, but switch does not see any auto-negotiation information from Trellix Intrusion Prevention System and defaults to half-duplex when operating at 10/100 Mbps.

10 Mbps

Half-duplex

AUTO

100 Mbps

Half-duplex

100 Mbps

Half-duplex

Link is established, but switch does not see Fast Link Pulse (FLP) and defaults to 10 Mbps half-duplex.

10 Mbps

Half-duplex

1000 Mbps

Half-duplex

No Link

No Link

Neither side establishes link due to speed mismatch.