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Topic # 150776 2-Aug-2014 19:14
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Reading through the service description of an Ultrafast 100/50 Bistream 2 service I have ordered for installation - I have noticed it has a minimum of 2.5Mbps CIR accessible by QOS tagging.

I'll be using a Cisco router.

What has been others experiences and results with QOS tagging on Ultrafast UFB services?

Also - can someone enlighten me on the difference between Bitstream 2 and Bitstream 2 Ultra?




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  Reply # 1100834 2-Aug-2014 19:43
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CIR tagging works exactly the same with Chorus and every LFC - tag the correct 802.1p tag and you'll use the CIR for your connection. Tag with 0 and you'll access the regular EIR.



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  Reply # 1101033 3-Aug-2014 11:05
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Yes Ultrafast has introduced CIR into the low priority (difference between regular BS2 and BS2 ultra) but the ONT is not colour aware so you can't tag for it.

The High Priority CIR is still there so you have use tagging to access that.

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  Reply # 1101036 3-Aug-2014 11:25
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To use the QOS Correctly you really need the connection tagged high Priority traffic both ways (Ie ISP to tag the traffic towards you and you to tag the traffic towards the ISP).

But first you have to decide WHAT you are going to tag (and remember you only have 2.5M (or whatever plan you are are) of traffic) . Normally you would tag VOIP Traffic for example as this is usually what its used for. Either Based on Destination of the VOIP Server and/or based on DSCP Values what your PABX/VOIP Phones sets and translating them to 802.1p value on the Bitstream 2 plans. Then the ISP has to do the same/similar on their end (Most ISP's won't give you a choice of this and might set this if its coming from their OWN VOIP Product)

This tagging would give the tagged traffic higher priority on the chorus network and cause less jitter and normal untagged traffic won't kill your VOIP traffic.

After it gets to the ISP then it could be a different story. They might convert the 802.1p Value to a DSCP Value thru their network (to their VOIP Product). After it leaves the ISPs then these markings won't make any difference.






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  Reply # 1101966 4-Aug-2014 18:37
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LennonNZ: To use the QOS Correctly you really need the connection tagged high Priority traffic both ways (Ie ISP to tag the traffic towards you and you to tag the traffic towards the ISP).

But first you have to decide WHAT you are going to tag (and remember you only have 2.5M (or whatever plan you are are) of traffic) . Normally you would tag VOIP Traffic for example as this is usually what its used for. Either Based on Destination of the VOIP Server and/or based on DSCP Values what your PABX/VOIP Phones sets and translating them to 802.1p value on the Bitstream 2 plans. Then the ISP has to do the same/similar on their end (Most ISP's won't give you a choice of this and might set this if its coming from their OWN VOIP Product)

This tagging would give the tagged traffic higher priority on the chorus network and cause less jitter and normal untagged traffic won't kill your VOIP traffic.

After it gets to the ISP then it could be a different story. They might convert the 802.1p Value to a DSCP Value thru their network (to their VOIP Product). After it leaves the ISPs then these markings won't make any difference.





Thanks for this information.

How is this set - Do I use "set cos" or another command?




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  Reply # 1102015 4-Aug-2014 19:48
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Update: fastethernet0/1.10 correctly set now.. (your interfaces may be different)

Yes set cos will do it but you have to have a route-map which matches something 1st to set it (all done by hand without checking its correct)

interface fastethernet 0/1.10
 encapsulation dot1q 10
 service-policy output output-cos

class-map match-all voip
  match ip dscp ef  <- Change to whatever your setting DSCP on your local network (most IP Phones are different)

policy-map output-cos
  class voip
  set cos 4  <- when it matches voip class then set 802.1p to 4
  class-default
  set cos 0  <- otherwise set to 0


Note: your ISP may do COMPLETELY different than this from them -> you . This is only from you -> them. You will have to ask them if they do anything. Also example above may be incomplete and RTP and SIP are usually marked with different DSCP so you will have to edit/change service-policy/policy-map as needed.







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  Reply # 1102047 4-Aug-2014 20:18
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LennonNZ: Yes set cos will do it but you have to have a route-map which matches something 1st to set it (all done by hand without checking its correct)

interface fastethernet 0/10
 encapsulation dot1q 10
 service-policy output output-cos

class-map match-all voip
  match ip dscp ef  <- Change to whatever your setting DSCP on your local network (most IP Phones are different)

policy-map output-cos
  class voip
  set cos 4   < when it matches voip class then set 802.1p to 4
  class-default
  set cos 0  < otherwise set to 0





Thanks for that.

From what I understand you are suggesting making the WAN interface a VLAN?

Is my UFF UFB traffic delivered VLAN tagged or not? I've assumed not in my config.




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  Reply # 1102060 4-Aug-2014 20:25
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You cannot do high/low priority traffic marking if the interface is not tagged. ISP's can deliver it non tagged but you cannot use high/low priority marked traffic then.



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  Reply # 1102061 4-Aug-2014 20:26
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LennonNZ: You cannot do high/low priority traffic marking is the interface is not tagged. ISP's can deliver it non tagged but you cannot use high/low priority marked traffic then.


Good point. I will contact them and clarify.

Thanks for your help :-)




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