06-01-2011 07:43 PM - edited 03-04-2019 12:35 PM
Hello:
I'm designing a simple QoS policy for two routers connected to eachother through a frame relay network. Since I have voice, the policy only have LLQ and CB Traffic shaping as shown below. The question is: Besides policin, do frame relay networks support any kind of QoS? If so, must the service provider apply the same QoS policies i applied in my end routers (LLQ, etc)?
class-map match-any QoS-Voice
match dscp ef
class-map match-any QoS-Sig
match dscp cs3 af31
class-map match-any QoS-DataBase
match protocol sqlnet
match protocol sqlserver
!this policy map is nested with Shaping-768 policy map
policy-map QoS-Queuing
class QoS-Voice
priority 300
class QoS-Sig
bandwidth 8
class QoS-DataBase
bandwidth 40
class class-default
fair-queue
random-detect
policy-map Shaping-768
class class-default
shape average 768000 7680
service-policy QoS-Queuing
interface Serial0/0.50 point-to-point
bandwidth 768
ip address x.x.x.x y.y.y.y
frame-relay interface-dlci 50 CISCO
frame-relay ip tcp header-compression
frame-relay ip rtp header-compression
service-policy output Shaping-768
Thanks in advance.
David.
Solved! Go to Solution.
06-02-2011 02:51 AM
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The Author of this posting offers the information contained within this posting without consideration and with the reader's understanding that there's no implied or expressed suitability or fitness for any purpose. Information provided is for informational purposes only and should not be construed as rendering professional advice of any kind. Usage of this posting's information is solely at reader's own risk.
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Posting
Don't believe frame-relay vendors offer any QoS beyond whether a frame is marked in or out of contract (DE bit).
If you have different link bandwidth between two sites (i.e. the bandwidth to the FR cloud), you'll want to shape the higher to match lower.
Much depends on actual FR vendor's capacity, but when working with voice, you may want to shape to CIR and/or implement adaptive shaping. (The latter might be too slow to respond to preserve VoIP quality.)
When working with VoIP, you also may want to stay away from the compression options.
06-02-2011 02:51 AM
Disclaimer
The Author of this posting offers the information contained within this posting without consideration and with the reader's understanding that there's no implied or expressed suitability or fitness for any purpose. Information provided is for informational purposes only and should not be construed as rendering professional advice of any kind. Usage of this posting's information is solely at reader's own risk.
Liability Disclaimer
In no event shall Author be liable for any damages whatsoever (including, without limitation, damages for loss of use, data or profit) arising out of the use or inability to use the posting's information even if Author has been advised of the possibility of such damage.
Posting
Don't believe frame-relay vendors offer any QoS beyond whether a frame is marked in or out of contract (DE bit).
If you have different link bandwidth between two sites (i.e. the bandwidth to the FR cloud), you'll want to shape the higher to match lower.
Much depends on actual FR vendor's capacity, but when working with voice, you may want to shape to CIR and/or implement adaptive shaping. (The latter might be too slow to respond to preserve VoIP quality.)
When working with VoIP, you also may want to stay away from the compression options.
06-07-2011 05:39 PM
David,
With Frame Relay, its the simple DE bit. The FR switches dont sort of mark/re-mark your QoS markings. They either drop or pass the frames.
In regards to the QoS policies, you need to work with the SP to match your policies. They provide different flavors of polices and you need to speak to them to suit your requirements.
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