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[tor-bugs] #8494 [Tor]: Relay bandwidth in consensus should not exceed MaxAdvertisedBandwidth



#8494: Relay bandwidth in consensus should not exceed MaxAdvertisedBandwidth
-----------------------------------------------------------+----------------
 Reporter:  alphawolf                                      |          Owner:                     
     Type:  defect                                         |         Status:  new                
 Priority:  normal                                         |      Milestone:                     
Component:  Tor                                            |        Version:  Tor: 0.2.4.11-alpha
 Keywords:  consesnsus, bandwidth, MaxAdvertisedBandwidth  |         Parent:                     
   Points:                                                 |   Actualpoints:                     
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 I've set MaxAdvertisedBandwidth to 100 KB (though RelayBandwidthRate and
 RelayBandwidthBurst are set to 128 KB and 153 KB, respectively).
 Accordingly, the relay does not advertise any bandwidth higher than 100
 KB.  However, the consensus is reporting greater bandwidth:

 `valid-afterÂ2013-03-17 01:00:00`
 `r PrivateJoker hWF85kNElIsLrCPNTiIkX39mwcgÂr5DGWEd9ufF4TFXJITuOhw+by6I
 2013-03-16 19:18:56 107.197.196.79 443 80`
 `s Fast Named Running Stable V2Dir Valid`
 `v Tor 0.2.4.11-alpha`
 `w Bandwidth=108`
 `p reject 1-65535`

 The bandwidth line from the descriptor looks like:

 {{{
 bandwidth 102400 156672 155648
 }}}


 My understanding is that clients use the consensus bandwidth measurement
 to weigh which paths to choose (correct me if I'm wrong). ÂIf this is
 true, then the consensus should not report bandwidth greater than
 !MaxAdvertisedBandwidth. ÂPerhaps the consensus should never show
 bandwidth greater than a relay's chosenÂ!RelayBandwidthRate?

-- 
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/8494>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
The Tor Project: anonymity online
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