Chapter 1: Overview
Combo Ports
The 10/100/1000Base-T ports 21R to 24R are paired with the four SFP slots to form four combo ports on the 24 port x600 Series switches. The 10/100/1000Base-T ports are identified with the letter “R” for “Redundant” as part of their number on the faceplate of the unit. The ports and slots are listed in Table 2.
Table 2. 10/100/1000Base-T Ports Matched with SFP Slots
Models | Ports and Slots |
| |
x600-24Ts | Port 21R with SFP slot 21 |
x600-24Ts/XP | Port 22R with SFP slot 22 |
x600-24Ts-POE | Port 23R with SFP slot 23 |
| Port 24R with SFP slot 24 |
| |
Follow these guidelines when using these ports and slots:
Only one port in a pair, either a 10/100/1000Base-T port or a corresponding SFP module can be active at a time.
A 10/100/1000Base-T port is the active port when its SFP slot is empty, or when an SFP module is installed but has not established a link to an end node.
A 10/100/1000Base-T port automatically changes to the redundant status mode when an SFP module establishes a link with an end node.
A 10/100/1000Base-T port automatically transitions back to the active status when the link is lost on an SFP module.
In nearly all cases, a 10/100/1000Base-T port and an SFP module share the same configuration settings, including port settings, VLAN assignments, access control lists, and Spanning Tree Protocol settings.
An exception to the shared settings is port speed. If you disable Auto- Negotiation on an 10/100/1000Base-T port and set the speed and duplex mode manually, the speed reverts to Auto-Negotiation when an SFP module establishes a link with an end node.
The PoE power supplied from ports 21R, 22R, 23R and 24R is unaffected by insertion of an SFP module in to the corresponding SFP combo port.
