CIR/EIR

Are you sure you don't mean BIR?

Never heard of EIR.

CIR is committed information rate - which is dedicated bandwidth. 

BIR is burstable information rate - which is shared bandwidth.

Some network operators mislead customers with CIR, using it to mean continuous information rate, instead of committed information rate.  The first is an average and is not dedicated bandwidth; the second is a committed minimum amount of dedicated bandwidth. 

However CIR is sometimes oversubscribed which technically means it really isn't CIR anyway as it can't be guaranteed.  Let the buyer beware.

Burst priority and Queue size refer to bandwidth management or QoS (quality of service) options.  Burst priority determines what traffic goes first.  Queue size determines how much traffic needs to be queued up before it's sent.  With data, for example you want to queue up a big chunk before sending it.  With VoIP (voice over IP), you want to send the small voice packets immediately, because the longer you hold them in a queue the more jitter you create.  Jitter kills voice quality. 

These terms could refer to specific types of traffic (data, voice, etc.) or they could refer to how your specific site accesses the service in relation to all the other sites.  In other words, sites with a higher burst priority would get to transmit before sites with a lower priority.  This could be the basis for several different classes of service. 

I'm not familiar with the specific terms your system configuration uses.  I would interpret cirtohub as 34 Kbps of CIR (dedicated) bandwidth on your upload link.  I would interpret maxbwtohub as 68 Kbps of BIR.  If this is correct, you have a shared upload service of 68 Kbps upload, with half of it dedicated (assuming the CIR is not oversubscribed by the network operator).  These parameters do not appear to describe your download capacity as data generally flows from the hub to the remote (download or outroute) and remote to hub (upload or inroute).

What VSAT service are you using?  Where are you finding these parameters?

Pat