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tevolo
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Wireless Full Duplex with the latest Technology

Tue Sep 27, 2011 1:38 am

I'm trying to plan the best possible method for creating a full duplex wireless link using 802.11N with a full duplex speed up to 100mbps. Mikrotik has some newer equipment that has been released lately which I think helps create a better full duplex link using OSPF (http://wiki.mikrotik.com/wiki/OSPF_to_s ... redundancy).

Can true full duplex be achieved using OSPF? There seems to be arguments for and against it.
A reason why I think OSPF in conjunction with the latest equipment is a better way to do full-duplex, is because it would offer a backup link using OSPF if an AP fails, and also means no cable loss.

This way at each site, I can have an RB750G performing the OSPF, with two RBSXT's plugged into the router serving as the wireless AP/Bridge. And then if one of the RBSXT's went down, the OSPF would acknowledge that and fix the path to work only over the one communicating pair of RBSXT's.

Thoughts about this setup? By using the latest technology, shouldn't people want to perform a wireless full-duplex this way rather than with multiple cards, and antennas?
Thanks.
 
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tevolo
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Re: Wireless Full Duplex with the latest Technology

Tue Sep 27, 2011 4:04 am

Also, I understand that there are alot of theoretical articles out there in regards to this type setup, but I'd like to hear from somebody that actually are using this type of setup, with what equipment (for the wireless bridges), and how well is it working or how fast of a duplex connection can you achieve?
Articles:
http://wiki.mikrotik.com/wiki/OSPF_to_s ... redundancy
http://gregsowell.com/?p=2493
http://blog.butchevans.com/2008/10/usin ... ess-links/
 
scampbell
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Re: Wireless Full Duplex with the latest Technology

Wed Sep 28, 2011 5:02 am

I have deployed Dual Wireless OSPF links and they do work well and provide the required redundancy.

Mine have historically been on RB433 with 2 x R52N cards.

Certainly should work with 4 X SXT's and 2 x RB750G's running OSPF.

I do recall there were some minor tweaks required to the example on the Wiki thought in respect to OSPF and wireless links. You may need to change network-type from Broadcast to PtMP if you have any issues.

http://wiki.mikrotik.com/wiki/Manual:Routing/OSPF

Also be sure to keep you two links on well separated frequencies.
 
wireless12
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Re: Wireless Full Duplex with the latest Technology

Wed Sep 28, 2011 7:23 am

I have deployed Dual Wireless OSPF links and they do work well and provide the required reldundancy.
are these dual OSPF links are transparent bridges.


Regards
 
scampbell
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Re: Wireless Full Duplex with the latest Technology

Wed Sep 28, 2011 8:15 am

They are dual wireless links running OSPF like this below :-


---WLAN1---->--------->-----------wlan1
rb433 rb433
---wlan2-----------<----------<----wlan2

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