PoE+를 사용하기위한 Extreme 스위치 lldp 설정
스위치 모델: x440-24P
AP : 802.3at(PoE+)
AP는 스위치의 12번 포트에 연결되어 있음.
802.3at 지원 AP를 연결했을때, AP가 정상 작동하지 않는 문제 발생함. 익스트림 x440-24p 모델은 802.3at(PoE+)를 지원함.
기존 설정은 아래와 같다.
switch # show config ... configure lldp port 12 advertise vendor-specific dot3 power-via-mdi configure lldp port 12 advertise vendor-specific med capabilities ...
스위치 포트의 lldp 상태를 보면, 802.3의 플래그가 P로 보인다.
switch # show lldp port 12
LLDP transmit interval : 30 seconds
LLDP transmit hold multiplier : 4 (used TTL = 120 seconds)
LLDP transmit delay : 2 seconds
LLDP SNMP notification interval : 5 seconds
LLDP reinitialize delay : 2 seconds
LLDP-MED fast start repeat count : 3
LLDP Port Configuration:
Port Rx Tx SNMP --- Optional enabled transmit TLVs --
Mode Mode Notification LLDP 802.1 802.3 MED AvEx DCBX
===============================================================================
12 Enabled Enabled -- --D-- --- -P-- C--p ---- --
===============================================================================
Notification: (L) lldpRemTablesChange, (M) lldpXMedTopologyChangeDetected
LLDP Flags : (P) Port Description, (N) System Name, (D) System Description
(C) System Capabilities, (M) Mgmt Address
802.1 Flags : (P) Port VLAN ID, (p) Port & Protocol VLAN ID, (N) VLAN Name
802.3 Flags : (M) MAC/PHY Configuration/Status, (P) Power via MDI
(+) Power via MDI with DLL Classification for PoE+,
(L) Link Aggregation, (F) Frame Size
MED Flags : (C) MED Capabilities, (P) Network Policy,
(L) Location Identification, (p) Extended Power-via-MDI
AvEx Flags : (P) PoE Conservation Request, (C) Call Server, (F) File Server
(Q) 802.1Q Framing
DCBX Flags : (I) IEEE 802.1Qaz DCBX, (B) Baseline v1.01 DCBX
802.3at가 지원되도록 port 설정을 아래와 같은 방법으로 변경한다.
configure lldp ports [PORT_LIST] advertise vendor-specific med capabilities
configure lldp ports [PORT_LIST] advertise vendor-specific med power-via-mdi
configure lldp ports [PORT_LIST] advertise vendor-specific dot3 power-via-mdi with-classification
enable lldp ports [PORT_LIST]
switch # configure lldp port 12 advertise vendor-specific dot3 power-via-mdi with-classification switch # configure lldp port 12 advertise vendor-specific med capabilities switch # configure lldp port 12 advertise vendor-specific med power-via-mdi
설정 변경후 lldp 설정을 확인해 보면, 802.3 플래그가 +로 바뀐것을 볼 수 있다.
* switch.4 # show lldp port 12
LLDP transmit interval : 30 seconds
LLDP transmit hold multiplier : 4 (used TTL = 120 seconds)
LLDP transmit delay : 2 seconds
LLDP SNMP notification interval : 5 seconds
LLDP reinitialize delay : 2 seconds
LLDP-MED fast start repeat count : 3
LLDP Port Configuration:
Port Rx Tx SNMP --- Optional enabled transmit TLVs --
Mode Mode Notification LLDP 802.1 802.3 MED AvEx DCBX
===============================================================================
12 Enabled Enabled -- --D-- --- -+-- C--p ---- --
===============================================================================
Notification: (L) lldpRemTablesChange, (M) lldpXMedTopologyChangeDetected
LLDP Flags : (P) Port Description, (N) System Name, (D) System Description
(C) System Capabilities, (M) Mgmt Address
802.1 Flags : (P) Port VLAN ID, (p) Port & Protocol VLAN ID, (N) VLAN Name
802.3 Flags : (M) MAC/PHY Configuration/Status, (P) Power via MDI
(+) Power via MDI with DLL Classification for PoE+,
(L) Link Aggregation, (F) Frame Size
MED Flags : (C) MED Capabilities, (P) Network Policy,
(L) Location Identification, (p) Extended Power-via-MDI
AvEx Flags : (P) PoE Conservation Request, (C) Call Server, (F) File Server
(Q) 802.1Q Framing
DCBX Flags : (I) IEEE 802.1Qaz DCBX, (B) Baseline v1.01 DCBX
이후, AP 정상 작동됨을 확인 했음.