April 2017 - Public - talk.mikrotik.com.au

UPS Serial Cable
by Paul Julian 29 Jun '17

29 Jun '17

Hi guys, we have got some APC UPS's with the serial DB9 connections on them but need to connect them to Mikrotik RB2011 and RB1100AHx2 models. Does anybody have any suggestions on a cable to suit ? The problem is they are both setup to be the B end of the situation and not the MT setup to be the A end and the UPS as the B end. I was thinking of a gender bender but don't really want to do that if I don't have to..... Any thoughts would be appreciated. Thanks Paul

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USB Ports on Routerboards
by Paul Julian 27 Apr '17

27 Apr '17

Hi all, has anybody successfully run more than one device off a USB port on a routerboard ? We need to connect a USB cable for a UPS and a 4G USB modem as well and just wondering if the routerboards will address more than one device on a port if we used a USB hub Thanks Paul

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ISP Recommendations
by Ben Jackson - eLogik 27 Apr '17

27 Apr '17

I'm looking for some help in locating a cost effective business grade service for a customer. They are currectly with TPG on a 20/20Mbps MBE / EoC service and are not happy with the service or price. They are about to hire 14 new staff and consequently need a faster service (in the region of 40Mbps) at minimum. They are based in The Rocks, Sydney. The building isn't lit up for fibre so I was considering other options such as fixed wireless? Some direction would be great. Thanks. *BEN JACKSON* Director *M *0404 924745 *E* ben(a)elogik.com.au *W* elogik.com.au <http://www.elogik.com.au/> <http://www.elogik.com.au>

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strange udp
by Alex Samad 26 Apr '17

26 Apr '17

Hi any one know what 81.198.87.240:15252 is used for by the CCR's then I found this https://forum.mikrotik.com/viewtopic.php?t=116484 This is more of an FYI. A

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Mikrotik L2MTU testing
by Philip Loenneker 26 Apr '17

26 Apr '17

Hi all, I'm sure we all know that you can use ping and do-not-fragment to test the L3 MTU of a path. But can you do anything to test the L2 MTU? We have the L2 MTU on some interfaces set to 1592. L3 MTU is still set to 1500. I want to know that the L2 MTU is working as intended. Doing a MAC ping, which I thought would use L2, is still limiting it to 1500 byte packets before they are unsuccessful due to fragmentation being required. I haven't done a packet capture to test, but it seems like the MAC ping is using L3 packets, which makes sense if it needs to use ICMP so that the destination host responds. I have also tried ARP ping, but that appears to ignore the packet size. I'm hoping to do this all Mikrotik to Mikrotik, but may have to resort to using another device off the side. Any suggestions? Regards, Philip Loenneker | Network Engineer | TasmaNet

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6.39rc8-
by Greg 26 Apr '17

26 Apr '17

This has bitten me on a few upgrade occasions(6.37.x>6.38.x).. There must have been an upset fan-base ? ***************** What's new in 6.39rc80 (2017-Apr-25 09:23): !) bridge - reverted bridge BPDU processing back to pre-v6.38 behaviour; (v6.40 will have another separate VLAN-aware bridge implementation); ********************** Cheers Greg

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Event driven scripts
by Alex Samad 24 Apr '17

24 Apr '17

Hi I know about the vrrp on backup / master events. Are there any ways to capture when an interface comes up. for example if an interface changes state to up I would like to run a script and if it goes off being up then run another scripts Alex

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