Long range links in mountainous area with Mikrotik
5 hops distance between the `tiks will be from 16km -23km and two by 45km
I was wondering can it be done with NV2 / TDMA / MIMO
wathever and achieve real 100-150 Mbit?
and what would be the best combination of routerbod /miniPCI cards / antenna ?
Yes I am in a finishing process of planning and designing wide regional network
and haven`t got a clue how to develop broadband backbone links. Fiber is out of the question due the terrain.
thank you for the real fas response,
I was thinking the same
RB 433AH or 435G with the UBNT RX, R5 or similar with rocket dish
What`s whit the wavearena and pacific wireless antennas ?
Can you share the picture of Interface>Status with us?
Can you describe the terrain and altitude or even better share google earth kml?
Could you at least share some guidelines of your setup for us.
I have a link of 6 hops with the total length of about 86 km. Here is what it looks like:
Wireless links are in N-only + NV2 (MIMO 2x2, R52hN’s and SR71). On top of each wireless link there is a point-to-point VPLS tunnel running (in different subnet). Each VPLS tunnel is inside the bridge with ETH, except with R9 and R13. In these two VPLS is in empty bridge due to the OSPF. So, there is a transparent bridge running all the way from Border router up until R9, and one running between R13 and segment of the net running Public servers. OSPF is running on Border router (BGP on WAN), R7, R9, R10, R11, R13 and all south (announcing private IP address range of the backbone 172.16.0.0/24 and the public IP addresses 109.x.x.x/x).
On top of each bridge, there is a private IP address within backbone subnet for administrative purposes. When I run a BW test, I get the following results:
from the Border router up until R8: 98 Mbps TCP, ping 13 - 24 ms
from the Border router up until R9: 78 - 82 Mbps TCP, ping 16 - 30 ms
from the Border router up until R13: 55 - 62 Mbps TCP, ping 20 - 35 ms, with 3% packet loss
When I do an individual check of each link I get 1 - 2 ms ping and 100 Mbps TCP. CCQ 92 - 100%, noise floor above -56 dBi, all signals around -60/-60. CPU usage an all devices in duration of peeks is bellow 50%. Firewall and connection tracking is up only on Border router, R10 and R14.
So, what am I doing wrong here. Why can’t I push trough 90 Mbps until R13? Also, these ping results are confusing.
As much of a pain as it is, you’d be better off routed rather than transparent bridge. I don’t know just how much of a performance hit that causes, but you will get broadcast traffic across the entire link, tiny little packets that don’t really do anything besides interrupt the larger data streams.
Actually, this part of the net used to be routed at the time I was running A-Turbo + NV2 links. But as soon as I switched to N MIMO, I ended up with very low end-to-end performances. Between connected points, the results were excellent. I had 130 Mbps TCP (close to 200 UDP) at 23 km. But on very next IP I got 70 and than on the next one 30 … I read somewhere that this is due to packet aggregation and translation from 802.3 to 802.11n and back, and that the only solution is to to do bridging. I do not know if this is so or not, but as that was a live line, I had to do something fast. That’s the reason why this part of net is now running under VPLS bridge … Have you had a different experience in a multi-hop environment?
Anyway, I do agree that routing is by far a better choice than bridging. Unfortunately, as to my knowledge, I could not use it here.
To get back to the current situation, I read somewhere in this forum that the cumulation of latency affects performance of 802.11n in a good part. So it’s safe to presume that these broadcasts within the bridge are affecting the latency and therefore affecting the performance. This could explain the results I had. Does it hold water?
If it does, what are the options I have for overcoming the problem? I do not know much about MESH protocol. As far as I know it’s a bridging protocol and a sort of successor to RSTP. Do you think it could suppress broadcast floods?
