mikrotik power over ethernet supported for cisco ?

Hardware MikroTik hardware general
1

hello i have one problem i think buying one cisco poe switching model is Cisco Catalyst 6500 Series 48 Port PoE Switching Module, WS-X6348-RJ45V this switch supported mikrotik router os ? maybe any people know this thanks regards

2

Not sure what your question is. Your subject asks about POE compatibility and your question is about ROS compatibility.

Obviously you won’t be running ROS on a Cisco switch so I’ll ignore that question. You will be running IOS.

Cisco supports 2 types of POE. They support 802.3af standard POE with 48vdc. And they support a legacy 48 volt system that they endorsed before 802.3af became the standard. In general, Mikrotik RouterBoards don’t support either of those standards and most RouterBoards don’t even work with 48vdc. There are a few exceptions. RB/CRD is supposed to work with 802.3af POE but many of our customers have not been able to make them work with their 802.3af POE switches. RB600A might work with 802.3af POE midspan devices but not endspan which is more common.

Tom

3

thanks for information

4

@Tom of Roc Noc

Is the poe+ (802.3at) switch such as Cisco can support any of mikrotik router board? For example RB433AH with 2 radio card.
Because I have already in my hand Cisco 2960 with poe+.

Thanks

5

I’ve a RB600A running with the power from a Cisco SGE2000P 24-Port 10/100/1000 Switch.
It would save a lot of cable/adapter/Powersupply if all MT-Boards would support this.

6

i actually had a conflict between a Cisco/Linksys SRW208P POE switch and a RB750G:

the customer had connected Eth1 of the RB750G, which has some POE electronics, to this switch.

the RB750G had its own wall plug power supply, it was not planned to be POE fed.

the effect was what seemed like a unpowered router. as soon as Eth1 was disconnected, the router powered up. it was not (or at least not obviously) damaged.

the lesson: Mikrotik POE is (documented) to be not standards compliant in for many models. make sure you never connect MT POE ports to real POE equipment unless you carefully checked compatibility first.

i still have to check what actually happend - the RB seems to have rectifiers on-board that should prevent the power to be shorted from Eth1.

andy

7

board has over-voltage protections, that is, if you feed more volts than board can handle - board turns off power. You most probably fed it with 48V instead of 28V max it can cope with. As result - board is still alive.

8

These guys make quite a few elegant solutions for providing power to both PoE and non-PoE devices over Cat-5 cabling:
http://www.panoptictechnology.com/network-smart-adapters/

9

I have upgraded to a cisco 3750x switch with poe+ standard (30w), still it’s kind of random if the rb800 powers up.

I have mounted 2 brand new rb800 without any radio cards on the same switch. One powers up, and one reports power failure.

First RB800

switch1#show power inline GigabitEthernet1/0/37
Interface Admin Oper Power Device Class Max
(Watts)

Gi1/0/37 auto on 15.4 MikroTik 0 30.0

Second RB800


switch1#show power inline GigabitEthernet1/0/38
Interface Admin Oper Power Device Class Max
(Watts)

Gi1/0/38 auto faulty 0.0 n/a n/a 30.0

As you see from the first RB800 does the cisco reports 15.4w of power use and it should be far away from the power limit of 30w.

I’ve would love to let go of all the poe injectors and to get the possibility to remote power cycle of the RB800 units.

Does anyone have a suggestion?