02-06-2007 05:10 AM - edited 03-05-2019 02:11 PM
I have two routers cisco 2801 with VoIP between them.
I used the following interface config for qos:
interface FastEthernet0/0
ip address 10.84.243.1 255.255.255.0
duplex auto
speed auto
auto discovery qos
interface Serial0/3/0
bandwidth 64
no ip address
encapsulation ppp
auto qos voip trust
auto discovery qos
no fair-queue
ppp multilink <---- Automatically generated
ppp multilink group 2001100116 <---- Automatically generated
After applying the commands "auto discovery qos" and "auto qos voip trust"
on Ethernet and Serial Interfaces, it generated the following commands:
class-map match-any AutoQoS-VoIP-RTP-Trust
match ip dscp ef
class-map match-any AutoQoS-VoIP-Control-Trust
match ip dscp cs3
match ip dscp af31
policy-map AutoQoS-Policy-Trust
class AutoQoS-VoIP-RTP-Trust
priority percent 70
class AutoQoS-VoIP-Control-Trust
bandwidth percent 5
class class-default
fair-queue
interface Multilink2001100116
bandwidth 64
ip address 10.245.2.210 255.255.255.248
ip tcp header-compression iphc-format
ppp multilink
ppp multilink fragment delay 10
ppp multilink interleave
ppp multilink group 2001100116
service-policy output AutoQoS-Policy-Trust
ip rtp header-compression iphc-format
How do I change the policy map configuration (auto configured)? I am new to this QoS.
Solved! Go to Solution.
02-06-2007 05:58 AM
Hi,
afaik the autogenerated config can be modified like any other policy-map.
As a good starting point for general QoS design and options have a look at the "Enterprise QoS Solution Reference Network Design Guide Version 3.3"
http://www.cisco.com/application/pdf/en/us/guest/netsol/ns432/c649/ccmigration_09186a008049b062.pdf
In your case you can implement additional classes and asign resources to them. Just keep in mind, that per default only 75% of the interface bandwidth can be used in a policy-map for guaranteed bandwidth.
An example of a modified policy to highlight, what I mean:
class-map match-any AutoQoS-VoIP-RTP-Trust
match ip dscp ef
class-map match-any AutoQoS-VoIP-Control-Trust
match ip dscp cs3
match ip dscp af31
class-map match-all FTP
match protocol ftp
policy-map AutoQoS-Policy-Trust
class AutoQoS-VoIP-RTP-Trust
priority percent 60
class AutoQoS-VoIP-Control-Trust
bandwidth percent 5
class FTP
bandwidth percent 10
class class-default
fair-queue
random-detect
Again 75% are allocated to the relevant classes. I took something from the VoIP class to give it to FTP. This might or might not be suitable in your environment and should just demonstrate the principle.
Hope this helps! Please rate all posts.
Regards, Martin
02-06-2007 05:58 AM
Hi,
afaik the autogenerated config can be modified like any other policy-map.
As a good starting point for general QoS design and options have a look at the "Enterprise QoS Solution Reference Network Design Guide Version 3.3"
http://www.cisco.com/application/pdf/en/us/guest/netsol/ns432/c649/ccmigration_09186a008049b062.pdf
In your case you can implement additional classes and asign resources to them. Just keep in mind, that per default only 75% of the interface bandwidth can be used in a policy-map for guaranteed bandwidth.
An example of a modified policy to highlight, what I mean:
class-map match-any AutoQoS-VoIP-RTP-Trust
match ip dscp ef
class-map match-any AutoQoS-VoIP-Control-Trust
match ip dscp cs3
match ip dscp af31
class-map match-all FTP
match protocol ftp
policy-map AutoQoS-Policy-Trust
class AutoQoS-VoIP-RTP-Trust
priority percent 60
class AutoQoS-VoIP-Control-Trust
bandwidth percent 5
class FTP
bandwidth percent 10
class class-default
fair-queue
random-detect
Again 75% are allocated to the relevant classes. I took something from the VoIP class to give it to FTP. This might or might not be suitable in your environment and should just demonstrate the principle.
Hope this helps! Please rate all posts.
Regards, Martin
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