【正文】 ....................64 ONU 的 DBA 功能要求 ...................................................................................................................................6410 多業(yè)務(wù) QoS 機(jī)制 ..............................................................................................................................................64 多業(yè)務(wù) QoS 總體要求 ...................................................................................................................................64 業(yè)務(wù)等級(jí)協(xié)定（SLA） .................................................................................................................................64 業(yè)務(wù)流分類功能 ............................................................................................................................................64 優(yōu)先級(jí)標(biāo)記 ....................................................................................................................................................65 優(yōu)先級(jí)隊(duì)列機(jī)制 ............................................................................................................................................65 流限速 ............................................................................................................................................................66 優(yōu)先級(jí)調(diào)度 ....................................................................................................................................................66 緩存管理 ........................................................................................................................................................6611 安全性 ...............................................................................................................................................................67 PON 接口數(shù)據(jù)安全 ........................................................................................................................................67 MAC 地址數(shù)量限制 .......................................................................................................................................73 過(guò)濾和抑制 ....................................................................................................................................................73 ONU 認(rèn)證功能 ................................................................................................................................................73 用戶認(rèn)證及用戶接入線路（端口）標(biāo)識(shí) ....................................................................................................77 其他安全功能 ................................................................................................................................................7712 組播功能 ...........................................................................................................................................................78 組播實(shí)現(xiàn)方式 ................................................................................................................................................78 組播協(xié)議 ........................................................................................................................................................78 IGMP Snooping 方式下的相關(guān)功能要求 ......................................................................................................79 組播控制 ........................................................................................................................................................80 組播性能要求 ................................................................................................................................................87 組播相關(guān)的擴(kuò)展 OAM 功能要求 .................................................................................................................8713 光纖保護(hù)倒換功能（可選） ...........................................................................................................................88III / 135 光纖保護(hù)倒換功能要求 ................................................................................................................................88 光纖保護(hù)倒換類型 ........................................................................................................................................88 光纖保護(hù)倒換準(zhǔn)則 ........................................................................................................................................89 光纖保護(hù)倒換時(shí)間 ........................................................................................................................................89 保護(hù)倒換返回機(jī)制 ........................................................................................................................................8914 光鏈路測(cè)量和診斷功能 ...................................................................................................................................89 OLT 的接收光功率檢測(cè) ................................................................................................................................89 ONU 的光收發(fā)機(jī)診斷參數(shù)測(cè)量 ....................................................................................................................89 ONU 的光收發(fā)機(jī)參數(shù)越限告警 ....................................................................................................................9015 語(yǔ)音業(yè)務(wù)要求（可選） ...................................................................................................................................9216 TDM 業(yè)務(wù)要求（可選） ..................................................................................................................................9317 業(yè)務(wù)承載性能指標(biāo)要求 ...................................................................................................................................93 以太網(wǎng)/IP 業(yè)務(wù)性能指標(biāo)要求 .......................................................................................................................93 語(yǔ)音業(yè)務(wù)性能指標(biāo)要求 ................................................................................................................................93 ARP Proxy 功能要求 .............................................................