A little difficult to do load balancing on a bridge. No way to determine where the traffic goes. You still have to manage STP (Spanning Tree Protocol) to some degree to make sure you don't get loops. You don't have to administer routes after initial setup with OSPF. That is the point, OSPF determines the route to use and the data moves. Depends on equipment used whether routed or bridged has lower latency. A fast router can move data faster than a slow bridge/hub/switch.
Marlon K. Schafer wrote: > I liked the idea of running a bridged backhaul. Is that not practical for > this? > > I'm hoping to have much lower latency and administrative overhead (less > routes to try and keep track of). > > thanks, > marlon > > ----- Original Message ----- > From: "can...@believewireless.net" <p...@believewireless.net> > To: "WISPA General List" <wireless@wispa.org> > Sent: Wednesday, March 04, 2009 4:52 AM > Subject: Re: [WISPA] 100 meg full duplex backhaul > > > >> We have the ring configuration with licensed links running OSPF >> without backups on the individual links. We spec our links to be as >> close to 99.999% at full modulation as possible. We continue to try >> to create loops in the network. For example, if you have a high-end >> commercial customer, sell them a backup link to another tower as part >> of the package. You've now created another link between towers and >> added another loop to your network. >> >> On Wed, Mar 4, 2009 at 1:06 AM, Jack Unger <jun...@ask-wi.com> wrote: >> >>> Marlon, >>> >>> Trying to design a complex system like this via a listserve "committee" >>> is >>> more than a little bit risky. Have you considered going to someone who >>> actually has this type of network design experience and paying them to do >>> the whole job right the first time? Just asking. >>> >>> jack >>> - Show quoted text - >>> >>> >>> Marlon K. Schafer wrote: >>> >>> I don't know if I'll be able to put some many antennas on the towers. >>> >>> How close together would I need the towers to prevent the rain fade >>> outage >>> at 18 gig? >>> >>> Aren't there any 5.8 systems that will do this reliably in the first >>> place? >>> I shouldn't need 5.x for distribution so I could use it all for backhaul. >>> I'll have 2.4, 3.65, 4.9 and hopefully, someday, TVBD for the consumers. >>> marlon >>> >>> ----- Original Message ----- >>> From: "Brian Webster" <bwebs...@wirelessmapping.com> >>> To: "WISPA General List" <wireless@wispa.org> >>> Sent: Tuesday, March 03, 2009 9:44 PM >>> Subject: Re: [WISPA] 100 meg full duplex backhaul >>> >>> >>> >>> >>> The 5.8 GHz backup links will help you deal with outages due to >>> environmental conditions such as rain fade. That has to be factored in >>> for >>> links when you operate above 10 GHz. Even if you run a loop configuration >>> you could have a fade condition that could block out a whole tower site >>> severing your links to that location in both directions of your loop. >>> Another path at a lower frequency with spatial diversity from your >>> primary >>> link (different mounting heights) would at least keep that site up though >>> maybe not at full speed. >>> >>> >>> >>> Thank You, >>> Brian Webster >>> >>> -----Original Message----- >>> From: wireless-boun...@wispa.org [mailto:wireless-boun...@wispa.org]on >>> Behalf Of Marlon K. Schafer >>> Sent: Wednesday, March 04, 2009 12:26 AM >>> To: WISPA General List >>> Subject: Re: [WISPA] 100 meg full duplex backhaul >>> >>> >>> Thanks. >>> >>> Do you think we need the unlicensed for each hop if the entire network is >>> build in a circle? >>> marlon >>> >>> ----- Original Message ----- >>> From: "Travis Johnson" <t...@ida.net> >>> To: "WISPA General List" <wireless@wispa.org> >>> Sent: Tuesday, March 03, 2009 9:12 PM >>> Subject: Re: [WISPA] 100 meg full duplex backhaul >>> >>> >>> >>> >>> Licensed 18ghz links with 5.8ghz backup links for each hop. Figure >>> $15,000 per link for everything. >>> >>> Travis >>> Microserv >>> >>> Marlon K. Schafer wrote: >>> >>> >>> Hi All, >>> >>> I'm looking for some gear that'll be rock solid at 15 to 20 miles. Some >>> links may be less, but I'm not counting on that. >>> >>> I'll be hauling public safety, private vpns, and normal internet >>> traffic. >>> >>> I'll probably have around 20 towers, all linked in a ring. I can load >>> share >>> across the ring as long as speeds never drop below 100megs. I'll want >>> things to be automatically self healing if there is a loss of >>> connectivity >>> in any direction. >>> >>> What would you guys use/suggest? >>> >>> I'd love to go licensed (but no 6 gig due to antenna sizes) but >>> unlicensed >>> may be OK due to the failover capabilities. >>> >>> We have to worry about snow, fog and, worst of all, dust storms. >>> >>> What gear would you use? How would you set this up? >>> >>> I'm in the pricing stage so off list quotes etc. are welcome. Pall park >>> numbers are fine at this time, as long as they tend to run high vs. low, >>> I'd >>> rather over estimate the costs. >>> >>> thanks, >>> marlon >>> >>> >>> >>> ------------------------------------------------------------------------- >>> >>> >>> ------- >>> >>> >>> WISPA Wants You! 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