Cisco Cisco Prime Virtual Network Analysis Module (vNAM) 6.0 White Paper
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Cisco Virtualized Multiservice Data Center (VMDC) Virtual Services Architecture (VSA) 1.0
Design Guide
Chapter 3 VMDC VSA 1.0 Design Details
System Level Design Considerations
Figure 3-19
Traffic Flow Types
To provide differentiated services, VMDC leverages the following QoS functionality:
•
Traffic
•
Congestion Management and Avoidance (
)
•
Traffic Conditioning (
Classification and Marking
Classification and marking enables networks using QoS to identify traffic types based on source packet
headers (L2 802.1p CoS and Differentiated Services Code Point (DSCP) information), and assign
specific markings to those traffic types for appropriate treatment as the packets traverse network nodes.
Marking (coloring) is the process of setting the value of DSCP, MPLS EXP, or Ethernet L2 class of
service (CoS) fields so that traffic can later easily be identified. using simple classification techniques.
Conditional marking is used to designate in-contract ("conform") or out-of-contract ("exceed") traffic.
headers (L2 802.1p CoS and Differentiated Services Code Point (DSCP) information), and assign
specific markings to those traffic types for appropriate treatment as the packets traverse network nodes.
Marking (coloring) is the process of setting the value of DSCP, MPLS EXP, or Ethernet L2 class of
service (CoS) fields so that traffic can later easily be identified. using simple classification techniques.
Conditional marking is used to designate in-contract ("conform") or out-of-contract ("exceed") traffic.
As in previous releases, the traffic service objectives translate to support for three broad traffic
categories:
categories:
1.
Infrastructure
2.
Tenant service classes (three data; two multimedia priority)
3.
Storage
provides a more granular description of the requisite traffic classes, characterized by their
DSCP markings and per-hop behavior (PHB) designations. This represents a normalized view across
validated VMDC and HCS reference architectures in the context of an eight-class IP/NGN aligned
model.
validated VMDC and HCS reference architectures in the context of an eight-class IP/NGN aligned
model.
Control traffic:
Nexus 1K management
Service console
VM admin
UCS(kvm/ssh/web)
5K/7K/storage(acess/web/ssh)
Nexus 1K management
Service console
VM admin
UCS(kvm/ssh/web)
5K/7K/storage(acess/web/ssh)
VMware vMotion
FCOE
IP storage: NFS datastore
Tenant
Storage
Mission Critical
Differentiated bandwidth guarantee
Time sensitive
No drop
Bandwidth guarantee
Infrastructure
Front End Traffic
Back End Traffic