ZyXEL NetAtlas User Guide - Page 240
Table 121
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Chapter 18 EPON Configuration The following table describes the labels in this screen. Table 121 EPON Configuration > Common Setting LABEL DESCRIPTION System Setting ONU MAC Authentication Select this option to allow the OLT to validate an ONU's access and registration to the OLT based on the ONU's MAC address. ONU Silence Timeout Enter the time interval (in seconds) in which the OLT allows the failed ONUs to register with it again. OLT Scheduling Method Select the traffic scheduling method that the OLT uses to service traffic. Traffic with the highest priority goes through the logical link with the lowest number. The smaller the index number of the link, the higher the link priority. If you select SP, the links are serviced strictly based on the link priority. If you select WRR, the links are serviced on a rotating basis based on the default link weight (1:2:4:8). Links with larger weights get more services than links with smaller weights. Priority If you select SP+WRR, traffic with the highest priority is transmitted first. When that link empties, the OLT use WRR to service the links with lower priorities. Use the following fields to configure the ToS-to-CoS or CoS-to-Cos priority mapping. The settings here take effect only when the traffic bridging type is set to a priority-related one, such as Priority Shared VLAN or Priority Simple Bridge in a Link Bridging Profile. On the ONU, traffic assigned to higher priority links gets serviced faster while traffic in lower priority links may be dropped if the network is congested. Upstream Priority Set how the OLT replaces or adds the IEEE 802.1p priority field (CoS) Copy Mapping value in the upstream packets. Select ToS Only and the OLT checks the ToS (Type of Service) field in the IP header and replaces or adds the IEEE 802.1p priority value according to the ToS to CoS priority mapping table. Select CoS Only and the OLT checks the IEEE 802.1p priority field in VLAN tag and replaces or adds the IEEE 802.1p priority value according to the CoS to CoS priority mapping table. Select ToS Over CoS to have the OLT checks the ToS field and replaces or adds the CoS field according to the ToS to CoS mapping table. If there is no ToS field in the packets, the OLT then checks the IEEE 802.1p priority field and replaces or adds the CoS field according to the CoS to CoS mapping table. Select CoS Over ToS to have the OLT checks the IEEE 802.1p priority field and replaces or adds the CoS field according to the CoS to CoS mapping table. If there is no CoS field in the packets, the OLT then checks the ToS field and replaces or adds the CoS field according to the ToS to CoS mapping table. 240 NetAtlas EPON Manager User's Guide
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