Community discussions

MikroTik App
 
iellison
just joined
Topic Author
Posts: 5
Joined: Wed Mar 16, 2005 7:55 pm

Transparent Bridge w/ Atheros CM9

Thu Jun 16, 2005 9:50 pm

From what I have read so far in this forum, I still have not found a solid answer to this question. Using 2.8.26 with Atheros cards, is there a way to do a transparent point-to-point bridge without using WDS? My understanding is that WDS is essentially halving my available bandwidth, which at half duplex is already half of what is reported. This should be a simple and common setup, but I have been unsucessful in doing it. Thanks in advance for any information.
 
REDTDI
Frequent Visitor
Frequent Visitor
Posts: 56
Joined: Fri May 28, 2004 9:41 pm

Re: Transparent Bridge w/ Atheros CM9

Fri Jun 17, 2005 8:17 pm

From what I have read so far in this forum, I still have not found a solid answer to this question. Using 2.8.26 with Atheros cards, is there a way to do a transparent point-to-point bridge without using WDS? My understanding is that WDS is essentially halving my available bandwidth, which at half duplex is already half of what is reported. This should be a simple and common setup, but I have been unsucessful in doing it. Thanks in advance for any information.
Have thought about using an eoip tunnel?

Ken
 
wildbill442
Forum Guru
Forum Guru
Posts: 1055
Joined: Wed Dec 08, 2004 7:29 am
Location: Sacramento, CA

Fri Jun 17, 2005 9:21 pm

halving your throughput?

Never seen anything like that when using WDS.. and what are you comparing it to that it's halving?
 
eflanery
Member
Member
Posts: 376
Joined: Fri May 28, 2004 10:11 pm
Location: Moscow, ID
Contact:

Fri Jun 17, 2005 9:25 pm

WDS is lighter weight than EoIP, so you should get better throughput with WDS.

WDS only cuts the bandwidth in half if you are using it as a "repeater", i.e. the packets need to egress via the same physical radio they came in on.

All WDS really does, is to expand the 802.11 header a little bit, by adding a few extra fields to carry the actual source and destination MAC addresses (and a few other flags and such) in addition to the BSSID MACs (thus making transparent bridging possable). This does cut the potential bandwidth by a bit, but not much.

EoIP re-encapsulates the entire ethernet frame inside an IP packet, so you would be adding two complete headers to each packet.

With straight 802.11 you have: IP over 802.11
With WDS you have: IP over "chubby" 802.11
With EoIP you have: IP over Ethernet over IP over 802.11.

--Eric
 
wildbill442
Forum Guru
Forum Guru
Posts: 1055
Joined: Wed Dec 08, 2004 7:29 am
Location: Sacramento, CA

Fri Jun 17, 2005 11:41 pm

http://forum.mikrotik.com/viewtopic.php?t=3467


scroll down to my two posts at the bottom...

WDS does not halve throughput... it adds a slight bit of overhead, but its not halving your throughput by any means.
 
dan_99503
newbie
Posts: 28
Joined: Mon Feb 07, 2005 3:41 am

Sun Jul 10, 2005 8:35 am

I'm surprised that that it requires EoIP or WDS. But I guess it's similar to what the other solutions are doing as well.
 
john2
just joined
Posts: 20
Joined: Thu Apr 07, 2005 5:55 pm

Sun Jul 10, 2005 11:18 am

802.11 protocol does not have facilites to do 802.1d bridging unless you use WDS -- it is that simple. Of course, we can bridge over any IP link when using EoIP -- and that includes wireless 802.11 links with an AP and a station.

John

Who is online

Users browsing this forum: andy76sz, anv, GoogleOther [Bot], mitzone and 66 guests