North American Network Operators Group

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Shared bandwidth and QoS

  • From: Eric Gauthier
  • Date: Wed Jun 22 13:25:33 2005


We have a situation where multiple organizations are all going to be 
sharing a gigabit ethernet based Internet feed.  We've each agreed to 
"purchase" a percentage of the cost of the feed.  The topology is 

   (Inbound GigE 802.1q Trunk)
----------------------------------->Collective Router w/eBGP to ISP------>ISP
  --Org #1, eBGP Peer 1, SubInt 1
  --Org #2, eBGP Peer 2, SubInt 2
 | .. etc

What we'd like to do is to set things up so that each institution always 
has access to their percentage of the ISP link bandwidth and, if there is 
additional bandwidth available, provide that everyone.  The only way I can 
think to accomplish this is via rate limits and priority queuing, but it looks 
as though I'll need to mark and/or rewrite the TOS bits in everyone's packets
to do so.  Does anyone have a better way of accomplishing this?

Eric :)