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Doubt on wiki: Dual Setup with OSPF

Posted: Mon Jun 13, 2011 12:54 pm
by el berto
Hi, I have some doubts about this configuration example on wiki:

http://wiki.mikrotik.com/wiki/Dual_Setup_with_OSPF
Dual Setup with OSPF
From MikroTik Wiki


In this setup we will be connecting a PTP configuration using a Dual Setup and OSPF (Open Shortest Path First).
The requirements for this set up is to have a board that supports at least 02 radios.
If you would like to double the bandwidth and redundancy, take a look at this Tutorial with Dual Radios.

The advantages for this setup are:

* Full Duplex
* Automatic Failover
* No delay of packets. The same set up utilizing N-Streme-Dual can cause delay, which can be a problem if you're dealing with VoIP or applications that requires maximum response.
* This set up can make use of two radios at each end, so the availability becomes even more robust in case of a radio failure.
What does it mean?
wlan1 on radio 1 (192.168.10.1) is connected to wlan1 on radio 2 (192.168.10.2), right?
Is the communication bi-directional (within these two radios) or only way?
- "Full Duplex": I understand if it's something similar to "nstream dual mode", right?
- "Automatic Failover": why? If one of these wlan1,2 breaks the link goes down anyway, right?
- "This set up can make use of two radios at each end, so the availability becomes even more robust in case of a radio failure": how if any link Awlan1-Bwlan1 or Awlan2-Bwlan2 is not bi-directional link?

Thanks.

Re: Doubt on wiki: Dual Setup with OSPF

Posted: Mon Jun 13, 2011 2:30 pm
by wpeople
this 2 radio link do the following:
A -> B goes thru WLAN-A
B -> A goes thru WLAN-B
because of cost settings. if one of the links goes down, only the other link is connected, so both tx and rx will use that link.