1
Download Allied Telesis AT-8525 User guide
Transcript
Configuring Network Services Quality of Service (QoS) Network Management 6.11.11 Example of an EPON/ONU Interface Policy Creating policies for the EPON/ONU involves the same steps as creating policies for the various device types, but the administrator should understand the EPON/ONU interfaces and how policies work on these interfaces. Note: The user should refer to the iMAP User Guide for complete information about provisioning the components that make up the EPON configuration. Following are the components that make the EPON/ONU interfaces: • EPON Interface - The EPON interface is one-to-one with the physical EPON port on the card. Like other interfaces the system can raise alarms on it, collect statistics on it, enable/disable it, etc. It will host ONU interfaces but it does not support any ETH interfaces directly. The EPON interface is always present when the card is present (i.e. they are not created/deleted by the user). The EPON interface is identified as an interface like epon:4.1 with the slot and physical port as the indices. The EPON interface has IGMP-specific attributes for video multicasting: • The VLAN for IP Multicast • IP Source Address for IGMP Proxy (0.0.0.0 is the default; refer to the iMAP User Guide on using other addresses). • ONU (Included with iMG/RG) The ONU interface supports/hosts one (and only one) ETH interface, which is actually an Ethernet port inside the iMG/RG. The ONU interface is identified like “onu:4.1.7” with the EPON's slot and physical port as the first two indices. The last index is a logical identifier. • SLA / QOSPOLICY (VLAN basis) The SLA provides attributes to ensure that a traffic flow is given adequate bandwidth to support a service on an ONU. Since the service may involve downstream only or upstream/downstream data flows, the QOSPOLICY has both upstream and downstream attributes. The QOSPOLICY is associated with a VLAN as well, and so to configure the QOSPOLICY, the user must understand the VLANs associated with a service and the traffic flows (upstream/downstream and downstream only) for each type of service. There are two types of traffic flows on which QOSPOLICYs are configured: 1. Upstream/Downstream Links • • • • • 2. There is one or more per ONU Each one carries one VLAN to one ONU. Downstream, they carry known unicast packets to the ONU Upstream, they carry unicast, broadcast, multicast, and unknown MAC packets. The first one provisioned on the ONU carries some control and management traffic upstream Downstream Only Link • One is for all ONUs • Carries two types of traffic, with each having a separately defined SLA (and therefore QOSPOLICY) - Multicast traffic for only the IP Multicast (IPMC) VLAN - Broadcast, Unknown Unicast, and flooded Multicast (BRUUM). This downstream link is shared for all VLANs on all ONUs on the EPON. When the AlliedView NMS is first loaded, a set of polices (with their flows, priorities, and traffic actions) are included. These profiles as well as the relevant VLAN can then be included with EPON and ONU port profiles. The following figure shows the default profiles, followed by a table that describes the attributes of these policies. AlliedView NMS Administration Guide 502
