Cisco Bug: CSCup17500 - power consumption is initially 15.4w and then 12.9w
Last Modified
Mar 08, 2018
Products (1)
- Cisco IP Phone 8800 Series
Known Affected Releases
1.0(0)
Description (partial)
Symptom: Steps: 1. Both CDP and LLDP enabled on 3560x switch 2. Configure voice vlan on switchport interface GigabitEthernet0/2 switchport access vlan 77 switchport mode access switchport voice vlan 985 spanning-tree portfast 3. PoE power up phone 4. Check power consumption on switch Result: It is 15.4w initially then after phone get stable, it is 12.9w Switch3560x#show power inline g0/2 Interface Admin Oper Power Device Class Max (Watts) --------- ------ ---------- ------- ------------------- ----- ---- Gi0/2 auto on 15.4 IP Phone 8861 4 30.0 Interface AdminPowerMax AdminConsumption (Watts) (Watts) ---------- --------------- -------------------- Gi0/2 30.0 30.0 Switch3560x#show power inline g0/2 Interface Admin Oper Power Device Class Max (Watts) --------- ------ ---------- ------- ------------------- ----- ---- Gi0/2 auto on 12.9 IP Phone 8861 4 30.0 Interface AdminPowerMax AdminConsumption (Watts) (Watts) ---------- --------------- -------------------- Gi0/2 30.0 30.0 5. Remove the voice vlan config on switchport switchport access vlan 985 switchport mode access spanning-tree portfast 6. Powercycle phone 7. Check power consumption on switch Result: It is always 14.2w Switch3560x#show power inline g0/2 Interface Admin Oper Power Device Class Max (Watts) --------- ------ ---------- ------- ------------------- ----- ---- Gi0/2 auto on 14.2 IP Phone 8861 4 30.0 Interface AdminPowerMax AdminConsumption (Watts) (Watts) ---------- --------------- -------------------- Gi0/2 30.0 30.0 Conditions: See steps in symptoms
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