可能发错区了，来这里咨询个 Cisco PoE 交换机与 Netgear PD 交换机的兼容性问题

[hrzhm]

Cisco 的 PoE 协议和 Netgear 的号称都是支持 802.3af 和 802.3at 的

实际我用 2960L-16PS 给 Netgear 的 GS105PE 供电，供电能识别到，但是网络连接无法识别

这个有没有什么兼容性的配置参数的= =

表现就是，端口快速 UP/DOWN 一次，然后显示未链接

我拔插几次网线的 log：

Dec 31 16:28:33.858: %LINK-3-UPDOWN: Interface GigabitEthernet0/16, changed state to down

Dec 31 16:28:35.136: ILP uses DC Disconnect(Gi0/16): state= ILP_LINK_UP_S, event= IEEE_PD_REMOVAL_EV

Dec 31 16:28:35.136: ilpower delete power from pd linkdown Gi0/16

Dec 31 16:28:35.136: Ilpower interface (Gi0/16), delete allocated power 15400

Dec 31 16:28:35.136: Ilpower interface (Gi0/16) setting ICUT_OFF threshold to 0.

Dec 31 16:28:35.286: ilpower_notify_lldp_power_via_mdi_tlv Gi0/16 pwr alloc 0

Dec 31 16:28:35.286: Gi0/16 AUTO PORT PWR Alloc 130 Request 130

Dec 31 16:28:35.286: Gi0/16: LLDP NOTIFY TLV:

(curr/prev) PSE Allocation: 13000/0

(curr/prev) PD Request : 13000/0

(curr/prev) PD Class : Class 4/

(curr/prev) PD Priority : low/unknown

(curr/prev) Power Type : Type 2 PSE/Type 2 PSE

(curr/prev) mdi_pwr_support: 7/0

(curr/prev Power Pair) : Signal/

(curr/prev) PSE Pwr Source : Primary/Unknown

Dec 31 16:28:35.286: ilpower_notify_lldp_tlv: lldp power class tlv:

Dec 31 16:28:35.286: (curr/prev) pwr value 15400/0

Dec 31 16:28:35.286: %ILPOWER-5-IEEE_DISCONNECT: Interface Gi0/16: PD removed

Dec 31 16:28:35.860: ILP uses DC Disconnect(Gi0/16): state= ILP_DETECTING_S, event= PHY_LINK_DOWN_EV

Dec 31 16:28:37.086: ILP uses DC Disconnect(Gi0/15): state= ILP_DETECTING_S, event=ILP_IEEE_PWR_GOOD_EV_SYS_PWR

Dec 31 16:28:37.086: %ILPOWER-7-DETECT: Interface Gi0/15: Power Device detected: IEEE PD

Dec 31 16:28:37.086: Ilpower PD device 3 class 7 from interface (Gi0/15)

Dec 31 16:28:37.086: ilpower new power from pd discovery Gi0/15, power_status ok

Dec 31 16:28:37.086: Ilpower interface (Gi0/15) power status change, allocated power 15400

Dec 31 16:28:37.086: ilpower_notify_lldp_tlv: lldp power class tlv:

Dec 31 16:28:37.086: (curr/prev) pwr value 15400/0

Dec 31 16:28:37.086: ilpower_notify_lldp_power_via_mdi_tlv Gi0/15 pwr alloc 15400

Dec 31 16:28:37.086: Gi0/15 AUTO PORT PWR Alloc 130 Request 130

Dec 31 16:28:37.086: Gi0/15: LLDP NOTIFY TLV:

(curr/prev) PSE Allocation: 13000/0

(curr/prev) PD Request : 13000/0

(curr/prev) PD Class : Class 4/

(curr/prev) PD Priority : low/unknown

(curr/prev) Power Type : Type 2 PSE/Type 2 PSE

(curr/prev) mdi_pwr_support: 7/0

(curr/prev Power Pair) : Signal/

(curr/prev) PSE Pwr Source : Primary/Unknown

Dec 31 16:28:37.086: %ILPOWER-5-POWER_GRANTED: Interface Gi0/15: Power granted

Dec 31 16:28:39.760: ILP uses DC Disconnect(Gi0/15): state= ILP_LINK_UP_S, event= PHY_LINK_UP_EV

Dec 31 16:28:41.757: %LINK-3-UPDOWN: Interface GigabitEthernet0/15, changed state to up

Dec 31 16:28:41.757: ilpower_powerman_power_available_tlv: about sending patlv on Gi0/15

Dec 31 16:28:41.757: req id 0, man id 1, pwr avail 15400, pwr man -1

Dec 31 16:28:43.858: %LINK-3-UPDOWN: Interface GigabitEthernet0/15, changed state to down

Dec 31 16:28:45.860: ILP uses DC Disconnect(Gi0/15): state= ILP_LINK_UP_S, event= PHY_LINK_DOWN_EV

Dec 31 16:28:52.083: ILP uses DC Disconnect(Gi0/15): state= ILP_LINK_UP_S, event= IEEE_PD_REMOVAL_EV

Dec 31 16:28:52.083: ilpower delete power from pd linkdown Gi0/15

Dec 31 16:28:52.083: Ilpower interface (Gi0/15), delete allocated power 15400

Dec 31 16:28:52.083: Ilpower interface (Gi0/15) setting ICUT_OFF threshold to 0.

Dec 31 16:28:52.233: ilpower_notify_lldp_power_via_mdi_tlv Gi0/15 pwr alloc 0

Dec 31 16:28:52.233: Gi0/15 AUTO PORT PWR Alloc 130 Request 130

Dec 31 16:28:52.233: Gi0/15: LLDP NOTIFY TLV:

(curr/prev) PSE Allocation: 13000/0

(curr/prev) PD Request : 13000/0

(curr/prev) PD Class : Class 4/

(curr/prev) PD Priority : low/unknown

(curr/prev) Power Type : Type 2 PSE/Type 2 PSE

(curr/prev) mdi_pwr_support: 7/0

(curr/prev Power Pair) : Signal/

(curr/prev) PSE Pwr Source : Primary/Unknown

Dec 31 16:28:52.233: ilpower_notify_lldp_tlv: lldp power class tlv:

Dec 31 16:28:52.233: (curr/prev) pwr value 15400/0

Dec 31 16:28:52.233: %ILPOWER-5-IEEE_DISCONNECT: Interface Gi0/15: PD removed

交换机上端口状态一直是：

GigabitEthernet0/16 is down, line protocol is down (notconnect)

多次拔插偶尔可以识别到一两次

Dec 31 16:41:07.935: %ILPOWER-5-IEEE_DISCONNECT: Interface Gi0/15: PD removed

Dec 31 16:41:24.739: %ILPOWER-7-DETECT: Interface Gi0/15: Power Device detected: IEEE PD

Dec 31 16:41:24.739: %ILPOWER-5-POWER_GRANTED: Interface Gi0/15: Power granted

Dec 31 16:41:29.358: %LINK-3-UPDOWN: Interface GigabitEthernet0/15, changed state to up

Dec 31 16:41:31.459: %LINK-3-UPDOWN: Interface GigabitEthernet0/15, changed state to down

Dec 31 16:41:36.289: %ILPOWER-5-IEEE_DISCONNECT: Interface Gi0/15: PD removed

Dec 31 16:41:46.890: %ILPOWER-7-DETECT: Interface Gi0/15: Power Device detected: IEEE PD

Dec 31 16:41:46.890: %ILPOWER-5-POWER_GRANTED: Interface Gi0/15: Power granted

Dec 31 16:41:51.958: %LINK-3-UPDOWN: Interface GigabitEthernet0/15, changed state to up

Dec 31 16:41:54.059: %LINK-3-UPDOWN: Interface GigabitEthernet0/15, changed state to down

Dec 31 16:41:57.258: %LINK-3-UPDOWN: Interface GigabitEthernet0/15, changed state to up

Dec 31 16:41:58.258: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/15, changed state to up

这次就是成功协商好的，正常能用- -

HOMEX#sh interfaces gigabitEthernet 0/15

GigabitEthernet0/15 is up, line protocol is up (connected)

Hardware is Gigabit Ethernet, address is 009a.d2d5.b98f (bia 009a.d2d5.b98f)

MTU 1522 bytes, BW 1000000 Kbit/sec, DLY 10 usec,

reliability 255/255, txload 1/255, rxload 1/255

Encapsulation ARPA, loopback not set

Keepalive set (10 sec)

Full-duplex, 1000Mb/s, media type is 10/100/1000BaseTX

input flow-control is off, output flow-control is unsupported

ARP type: ARPA, ARP Timeout 04:00:00

Last input 00:32:06, output 00:00:00, output hang never

Last clearing of "show interface" counters never

Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0

Queueing strategy: fifo

Output queue: 0/40 (size/max)

5 minute input rate 0 bits/sec, 0 packets/sec

5 minute output rate 4000 bits/sec, 7 packets/sec

169 packets input, 26005 bytes, 0 no buffer

Received 139 broadcasts (89 multicasts)

0 runts, 0 giants, 0 throttles

0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored

0 watchdog, 89 multicast, 0 pause input

0 input packets with dribble condition detected

1494 packets output, 143925 bytes, 0 underruns

0 output errors, 0 collisions, 1 interface resets

0 unknown protocol drops

0 babbles, 0 late collision, 0 deferred

0 lost carrier, 0 no carrier, 0 pause output

0 output buffer failures, 0 output buffers swapped out

cdp 默认开启，lldp 默认没开，都启用禁用过了，无效

端口强制 speed 1000 和 duplex full，也无效

lldp 最大的帮助就是，在小几率能连上的情况下，PD 受电能识别到 30W，没开 lldp 是 15.4W

可是网络连接还是断的呀还是断的呀！！= =

各位大大有啥建议么？

[Sh888]

"实际我用 2960L-16PS 给 Netgear 的 GS105PE 供电"
没有搞错的话，交换机给交换机供电？交换机只能 POE 供电，不能 POE 取电。

[Sh888]

好吧，是我搞错了。还真可以 POE 取电。
http s://kb.netgear.com/en_US/24268/?_ga=2.64050031.1577813581.1514957999-1275731904.1514957999
GS105PE
15.4W (802.3af) max on ports 1 and 2, not to exceed 19W maximum pass-thru across all connected devices) using an 802.3at (PoE+) source; max limit of 8W pass-through total across ports 1 and 2 using 802.3af (PoE) source

在 cisco 的端口上试一下指定功率，power inline static max 15400

[Sh888]

直接 1 个 poe 需要支持 poe+，接 2 个只需要支持 poe

[hrzhm]

@Sh888 供电正常，是网络不通的问题

[Sh888]

@hrzhm 设置这个试试看 power inline static max 30000

[hrzhm]

@Sh888 和供电无关，power 下全部参数早已测试过

[tifan]

尝试换网线。

[hrzhm]

@tifan 这种简单的事情就不需要提醒了吧= =xxx

[nbsn]

需要在思科交换机全局启用 LLDP，(config)# lldp run，在用 show power inline 看一下，所在的接口是否支持 Max 30W。如果想 GS105PE 的 1,2 口正常供电，需要 30W 支持。

我的是 3560CX 连的，工作正常

[hrzhm]

@nbsn 已开启 LLDP，支持 30W，我现在不是供电问题，是端口没有 UP

[yingfengi]

poe 交换机给 poe 交换机供电？还有这种操作？
就算是 at 也才 30W 啊

[hrzhm]

@yingfengi 有，另外小交换机 30W 足够足够了吧

[yingfengi]

@hrzhm 是 poe 受电的交换机吧？供电的话，最高才 30W 他怎么给其他设备供。而且多半是 15W 的

[hrzhm]

受电 30，输出也是 30 很奇怪么- -

[nbsn]

@hrzhm 那就要检查你的网线了，达不到六类线的标准供电是有问题的

[hrzhm]

@nbsn TE 原厂 6 类跳线，当然也换过康普的，我长得这么像笨到不怀疑是网线问题的人么|||