Stations, ports, PoE
PoE configuration:
A Catalyst 4500 series switch has three PoE modes:
- auto - PoE interface. Power is provided only if a phone is seen, and there's enough power
- static - High priority PoE interface. Power is always provided, even of there's no phone
- never - Data interface only. Power is never provided, even if a phone is connected
| power inline {auto | static | never} | sets the interface to power option |
| show power inline {interface | module} | Displays the PoE state for the switch |
| show power detail | Displays the PoE state in detail |
| [no] power inline consumption default | Sets the PoE consumption (in milliwatts) of all powered devices connected to the switch. To re-enable the automatic adjustment of consumption, either use the no keyword or specify 15,400 milliwatts. |
| show power inline consumption default | Displays the administrative PoE consumption of powered devices connected to the switch. |
Examples:
1Set the Fast Ethernet interface 4/1 to automatically send power through that interface, and verify the PoE configuration:
Switch# configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Switch(config)# interface fastethernet 4/1
Switch(config-if)# power inline auto
Switch(config-if)# end
Switch# show power inline fastethernet 4/1
Available:677(w) Used:11(w) Remaining:666(w)
Interface Admin Oper Power(Watts) Device Class
From PS To Device
--------- ------ ---------- ---------- ---------- ------------------- -----
Fa4/1 auto on 11.2 10.0 Ieee PD 0
Interface AdminPowerMax AdminConsumption
(Watts) (Watts)
---------- --------------- --------------------
Fa4/1 15.4 10.0
Switch#
2Set an interface to never supply power:
Switch# configure terminal Enter configuration commands, one per line. End with CNTL/Z. Switch(config)# interface fastethernet 5/2 Switch(config-if)# power inline never Switch(config-if)# end Switch#
3Display the Operational Status for an Interface:
Switch# show power inline Available: 240.0 (w) Used: 29.5 (w) Remaining: 210.5 (w) Interface Admin Oper Power Device Class Max (Watt) --------------------------------------------------------------------------- GiO/1 auto on 14.7 IP Phone 8865 4 30.0 Gi0/2 auto on 14.7 IP Phone 8865 4 30.0 Gi0/3 auto off 0.0 n/a 30.0 GiO/4 auto off 0.0 n/a 30.0 GiO/5 auto off 0.0 n/a 30.0 Gi0/6 auto off 0.0 n/a 30.0 Gi0/7 auto off 0.0 n/a 30.0 Gi0/8 auto off 0.0 n/a 30.0 Switch#
Note: 'Used' cannot exceed 'Available'!
7800/8800 Series Power Requirements:
| IP Phone | Class 1 (4W / 3.84W) | Class 2 (7W / 6.49W) | Class 3 (15.4W / 12.49W) | Class 4 (30W / 25.5W) |
|---|---|---|---|---|
| 7800 Series | 7811 7821 7841 7861 | 7832 Conference Phone | ||
| 8800 Series | 8811 8841 8845 | 8831 Conference Phone 8832 Conference Phone | 8851 8861 8865 |
Power Classes:
| Power Class | PSE Output Power | PD Input Power | PD Type |
|---|---|---|---|
| 0 | 15.4 | 12.95 | 802.3af-Type 1 PoE |
| 1 | 4 | 3.84 | 802.3af-Type 1 PoE |
| 2 | 7 | 6.49 | 802.3af-Type 1 PoE |
| 3 | 15.4 | 12.49 | 802.3af-Type 1 PoE |
| 4 | 30 | 25.5 | 802.3at-Type 2 PoE+ |
| 5 | 45 | 40 | 802.3bt-Type 3 4PPOE |
| 6 | 60 | 51 | 802.3bt-Type 3 4PPOE |
| 7 | 75 | 62 | 802.3bt-Type 4 |
| 8 | 100 | 73 | 802.3bt-Type 4 |