Community discussions

MUM Europe 2020

Search found 14 matches

by DJSmiley
Tue Aug 14, 2018 7:26 pm
Forum: RouterBOARD hardware
Topic: CWDM-MUX8A
Replies: 1
Views: 573

Re: CWDM-MUX8A

Yes, you can, but - You'll need an additional splitter to combine both RX and TX, since you're planning using single strand. - You'll have additional losses due to the combined RX/TX and connectors - You're only using half of the wavelengths, since you need the others at the other side to be demuxed...
by DJSmiley
Tue Jul 03, 2018 9:57 am
Forum: General
Topic: CRS328-4C-20S-4S+RAM upgrade
Replies: 9
Views: 883

Re: CRS328-4C-20S-4S+RAM upgrade

Why bidi? Attenuation is usually specified for 1310 and 1550nm wavelengths. 1310nm has a higher attenuation compared to 1550nm, depending on the fiber type. Bidi uses 1270/1330nm, so even if you have sufficient power budget to establish link, there is less remaining budget to compensate for small fi...
by DJSmiley
Mon Jul 02, 2018 10:32 pm
Forum: General
Topic: CRS328-4C-20S-4S+RAM upgrade
Replies: 9
Views: 883

Re: CRS328-4C-20S-4S+RAM upgrade

No problem usually, but it depends on your link loss.

Are using WDM? In those cases you have to included the mux losses as well.

As a general rule: Any 80km optic usually will work, but you can only confirm this for sure if you know the line loss.
by DJSmiley
Wed Apr 26, 2017 12:34 pm
Forum: General
Topic: v6.39rc80 [release candidate] is released!
Replies: 63
Views: 11423

Re: v6.39rc80 [release candidate] is released!

From the release notes:

What's new in 6.39rc80 (2017-Apr-25 09:23):
*) snmp - added optical table;

I was missing this for a long time. Hope to finally be able to monitor power levels on optics using SNMP.

Any more information about this? What are the OID's for this?
by DJSmiley
Wed Apr 05, 2017 12:07 am
Forum: Wireless Networking
Topic: Mikrotik wi-fi and Iphone = problem
Replies: 70
Views: 48318

Re: Mikrotik wi-fi and Iphone = problem

Which channels are you using and which iphone?

I know there was an issue with DFS channels which has been rsolved in a RC

https://mikrotik.com/download/changelog ... lease-tree

*) wireless - fixed false positive DFS radar detection caused by iPhone 6s devices;
by DJSmiley
Tue Apr 04, 2017 12:04 am
Forum: Beginner Basics
Topic: CRS Config - Vlans
Replies: 2
Views: 2421

Re: CRS Config - Vlans

You can do vlans either on the switch or on the CPU. The usual way of doing it in the CPU and creating vlan interfaces is not recommended. If you check the block diagram you'll see the CPU has only 1Gbit. So by using the CPU you're actually limiting the switch to a slow device. Its far better to use...
by DJSmiley
Sat Apr 01, 2017 3:33 pm
Forum: Wireless Networking
Topic: hotel room wifi with hap lite
Replies: 17
Views: 2837

Re: hotel room wifi with hap lite

I would strongly recommended dualband AP's, unless the hotel is in a remote location. In urban environments, stable connectivity at 2.4Ghz is an issue. Whats the timeframe you want to install this? You might look at the upcoming wsAP ac lite. You can fix that one in a standard walls socket, so it ma...
by DJSmiley
Fri Mar 31, 2017 9:16 pm
Forum: RouterBOARD hardware
Topic: RB2011UiAS-RM & FTTH
Replies: 2
Views: 1125

Re: RB2011UiAS-RM & FTTH

It depends what your provider does use. If its a passive optical network (eg a fixed amount of bandwith shared with multiple customers), which is GPON, you have to use a GPON optic. Based on the mediaconverter which you're linking to it seems they are using 'regular' fiber links. In that case the op...
by DJSmiley
Fri Mar 31, 2017 8:49 pm
Forum: Wireless Networking
Topic: Severe BUG in firmware 6.37.x - 6.38.5 ! PROBLEM !
Replies: 30
Views: 4439

Re: Severe BUG in firmware 6.37.x - 6.38.5 ! PROBLEM !

We were able to detect the false radar detection - iPhone 6s were triggering the DFS. We were able to fix it. Current RC version (v6.39rc58) contains a fix for that. And in the next RC version which we will release soon we have finetuned that detection even better. Note that there are two other iss...
by DJSmiley
Tue Feb 28, 2017 4:33 pm
Forum: RouterBOARD hardware
Topic: Which 80km fiber SFP+ modules 10G-ZR work
Replies: 12
Views: 2949

Re: Which 80km fiber SFP+ modules 10G-ZR work

We did get some of the fiberstore modules and they seem to be working. First shipment we got from them didn't work for some reason, but the replacements seem to be working fine. WDM or grey? I don't have 10Gbit grey optics to test. CWDM works (altough I only have some shorter links). For all longer...
by DJSmiley
Thu Feb 23, 2017 4:35 pm
Forum: RouterBOARD hardware
Topic: Which 80km fiber SFP+ modules 10G-ZR work
Replies: 12
Views: 2949

Re: Which 80km fiber SFP+ modules 10G-ZR work

I'm having issues with 80Km optics. 10Gbase-SR works fine, also for 10Km CWDM optics. 1Gbase-ZR 80km also works (but those are 1Gbit). For the CWDM optics, optics are recognized, powerlevels are fine, and link is established. 10Gbase DWDM / 80Km doesnt come up. I have to manually disable and re-enab...
by DJSmiley
Fri Feb 17, 2017 12:25 pm
Forum: RouterBOARD hardware
Topic: CCR1072 - M.2 SSD compatibility
Replies: 14
Views: 3246

Re: CCR1072 - M.2 SSD compatibility

Any updates? Seems most PCIe M2 SSDs nowadays are PCIe3.0x4 Also, since I'm not very familar with M2 SSDs, they seem to be available in AHCI and NVMe version. I can't find a list of verified/working/compatible SSD's. Since the CCR1072 has 2 slots: Is it possible to run the SSDs in RAID, or are they ...
by DJSmiley
Thu Feb 19, 2015 8:27 pm
Forum: RouterBOARD hardware
Topic: CRS226-24G-2S+ routing speed
Replies: 2
Views: 739

Re: CRS226-24G-2S+ routing speed

So in fact, this device works as a 24-port switch with a simple routerboard in 1 case? Since the Mikrotik website was labelling it as a 'L3 switch' I was hoping to have some decent throughput. Off course I wasn't expecting full throughput when using nat and a lot of other cpu-intensive jobs, but for...
by DJSmiley
Thu Feb 19, 2015 2:56 pm
Forum: RouterBOARD hardware
Topic: CRS226-24G-2S+ routing speed
Replies: 2
Views: 739

CRS226-24G-2S+ routing speed

What is the routing speed of this device? I am considering this unit to bridge between 2 networks. It only needs to do switching and 1 default route. No ACL or other things, just plain routing. Uplink port will be 1x 10Gbit. Can this unit do this or do I need the CCR? I think this will be sufficient...