Auto-Mdix Connections - Cisco Catalyst 9200 Series Hardware Installation Manual

Auto-MDIX Connections

• Let the ports autonegotiate both speed and duplex.
• Set the interface speed and duplex parameters on both ends of the connection.
Auto-MDIX Connections
The autonegotiation and the auto-MDIX features are enabled by default on the switch.
With autonegotiation, the switch port configurations change to operate at the speed of the attached device. If
the attached device does not support autonegotiation, you can manually set the switch interface speed and
duplex parameters.
With auto-MDIX, the switch detects the required cable type for copper Ethernet connections and configures
the interface accordingly.
If auto-MDIX is disabled, use the guidelines in this table to select the correct cable.
Table 14: Recommended Ethernet Cables (When Auto-MDIX is Disabled)
Device
Switch to switch
Switch to hub
Switch to computer or server
Switch to router
Switch to IP phone
3
Cisco Catalyst 9200 Series Switches Hardware Installation Guide
76
100BASE-TX and 1000BASE-T traffic requires twisted four-pair, Category 5 or higher. 10BASE-T
traffic can use Category 3 cable or higher.
Crossover Cable
Yes
Yes
No
No
No
Installing a Compact Switch
Straight-Through Cable
No
No
Yes
Yes
Yes