QoS Policy Support

[MartyHeyman]

I trust everyone is keeping well during the current pandemic. I am working on a QoS design using Packet Tracer first and need a little guidance please.

This is the network design is:

The given design considerations are:

• Voice applications traffic, generated by voice-related applications (such as contact call centres)
• Mission-critical traffic, generated, for example, by database applications
• Transactional traffic, generated by e-commerce applications
• Routing update traffic from routing protocols such as Enhanced Interior Gateway Routing Protocol (EIGRP)
• Bulk transfer (such as file transfer or HTTP), considered best-effort traffic

The requirements are:

1. Design Queuing strategies to cope with the traffic mix mainly at Sligo
2. Using Access Control Lists (ACL’s) to segregate your different traffic classes
3. Using the ACL’s then create class maps to cope with the different traffic flows
4. Create policy maps to contain these class maps
5. Insert the policy maps at the relevant points on the network
6. Demonstrate where traffic policing will be implemented within the network
7. Show also where traffic shaping will take place on the network
8. Show how PPP multilink could be used and apply if necessary
9. Show how header compression can be used on the WAN link
10. Any other scenario which you may consider appropriate

I have created the ACLs based on TCP/UDP ports for the Voice, Video, Mission-Critical, Signalling, Transactional-Data and Bulk-Data. I have created the corresponding Class-Maps and Policy-Map (config attached) but the Policy-Map is: 

policy-map WAN-Out
!
class Routing
priority percent 3
set precedence 6
!
class Voice
priority percent 20
set precedence 5
!
class Video 
Priority percent 10
set precedence 4 
!
class Signalling 
bandwidth percent 5
set precedence 3
!
class Mission-Critical-Data
bandwidth percent 10
set precedence 3
random-detect prec-based
!
class Transactional-Data
bandwidth percent 7
set precedence 2
random-detect prec-based
!
class Bulk-Data
bandwidth percent 4
set precedence 1
random-detect prec-based
!
class Class-Default
bandwidth percent 25
set precedence 0
random-detect
!
interface serial 0/0/0
service-policy output WAN-Out
!

Questions I have and would appreciate some help please are:

1. Am I correct to place the policy outbound on the Serial 0/0/0 interface of the Sligo router as this is where congestion will be encountered?
2. Is there any other config I need, i.e. packet shaping on Serial 0/0/0 interface, or anything config on the FastEthernet 0/0 inbound interface of the Sligo router?
3. What QoS information should be configured on the Dublin router?

Thank you in advance for your help.

[Gagandeep Kaur]

Hello,

There is a community dedicated to Cisco Learning. You can ask your Cisco Learning related questions at https://learningnetwork.cisco.com.

Regards,
- Gagan