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Bandwith on a Point-to-Multipoint Bridges

Hello everybody..

I`m already designing a point-to-multipoint bridging with Aironet 1300. On the central site I have a omnidirectional antenna and on the remote site integrated antenna. The question is: How much bandwith could I get if my topology is 1 central site a 5 remotes sites?

Does the 54Mbps bandiwith is share between 5 point or does each one could get 54 Mbps.?

Thanks in advance...

2 REPLIES
Hall of Fame Super Red

Re: Bandwith on a Point-to-Multipoint Bridges

Hi Edgar,

Have a look at the following excerpt;

Point-to-Multipoint Bridging

In a point-to-multipoint configuration, two or more non-root bridges associate to a root bridge. Up to 17 non-root bridges can associate to a root bridge, but the non-root bridges must share the available bandwidth.

From this doc;

Cisco Aironet 1300 Series Outdoor Access Point/ Bridge

http://www.cisco.com/en/US/products/ps5861/products_configuration_guide_chapter09186a008021e5ca.html#wp1034650

Hope this helps!

Rob

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Cisco Employee

Re: Bandwith on a Point-to-Multipoint Bridges

The BR1310 just has a single channel, so its

(half-duplex) bandwidth is shared across all bridge

links.

Best case, an error free 2.4GHz channel using 802.11g

at a nominal signaling rate of 54Mbps yields up to

about 27Mbps due to the MAC layer overhead. So this

27Mbps would be shared across all links in your

P2MP network.

Your aggregate throughput will be dragged down by

retransmission and by sub-54Mbps transmissions.

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