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前提知識: ethernetのおさらい(802.3) Node-A MAC層L2 RS層 PCS PHY下層 Node-Z MAC層L2 RS層 PCS PHY下層 1.断 2. RX光断 3. LF生成 LF LF 4. LF受信 Z Ether Down RF 5. RF生成 RF 6. RFが送られる RF RF受信 してRSに渡 す RF 7. RF受信 A Ether Down (MAC断) IDLE 8. RFなので IDLE生成 9. IDLEを送 りたい (MAC断) IDLE 基本的な動作(メーカごとに差分があるかもしれない ) ● LinkDown転送 (Linkdown PassThough) ○ UNI downをEthernet Statusを対向のUNIに送るか？ ● ALS有無(Auto Laser Shutdown) ○ A側のRxが受光していない時(に相当する時)Z側のTxの発光をとめるか？ 広域専用回線におけるLPT/ALSととLF/RF/Link/Laserの関係がむずかしい ⇨設定状態値 と 障害パターン に各点でどうなるか知りたい！

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A ONU A ONU Z Z EtherLink: UP 光Rx: Yes EtherLink: UP 光Rx: Yes A ONU A ONU Z Z EtherLink: DOWN 光Rx: NO EtherLink: DOWN 光Rx: Yes UNI Link: UP UNI Link: UP UNI Link: DOWN UNI Link: DOWN ! LF RF RF パターン1: LinkDown転送 ON Automatic Laser Shutdown ON A ONU A ONU Z Z EtherLink: DOWN 光Rx: Yes UNI Link: DOWN UNI Link: DOWN ! LF EtherLink: DOWN 光Rx: NO RF IDLE IDLE RF ONU UNI - SW間 L2終端 A ONU A ONU Z Z EtherLink: DOWN 光Rx: NO EtherLink: DOWN 光Rx: Yes UNI Link: DOWN UNI Link: DOWN ! LF RF RF A ONU A ONU Z Z EtherLink: UP 光Rx: Yes UNI Link: DOWN UNI Link: UP ! LF EtherLink: DOWN 光Rx: NO RF IDLE IDLE RF ビット透過パターン LF !

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A ONU A ONU Z Z EtherLink: UP 光Rx: Yes EtherLink: UP 光Rx: Yes A ONU A ONU Z Z EtherLink: DOWN 光Rx: Yes EtherLink: DOWN 光Rx: Yes UNI Link: UP UNI Link: UP UNI Link: DOWN UNI Link: DOWN LF RF RF パターン2: LinkDown転送 ON Automatic Laser Shutdown OFF A ONU A ONU Z Z EtherLink: DOWN 光Rx: Yes UNI Link: DOWN UNI Link: DOWN LF EtherLink: DOWN 光Rx: YES RF LF ! LF RF IDLE IDLE A ONU A ONU Z Z EtherLink: DOW 光Rx: Yes EtherLink: DOWN 光Rx: Yes UNI Link: DOWN UNI Link: DOWN ! LF RF RF A ONU A ONU Z Z EtherLink: DOWN 光Rx: Yes UNI Link: DOWN UNI Link: UP LF EtherLink: DOW 光Rx: YES RF ! RF LF ! ONU UNI - SW間 L2終端 ビット透過パターン

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A ONU A ONU Z Z EtherLink: UP 光Rx: Yes EtherLink: UP 光Rx: Yes UNI Link: UP UNI Link: UP パターン3: LinkDown転送 OFF Automatic Laser Shutdown OFF A ONU A ONU Z Z EtherLink: UP 光Rx: Yes EtherLink: DOWN 光Rx: Yes UNI Link: UP UNI Link: DOWN A ONU A ONU Z Z EtherLink: UP 光Rx: Yes EtherLink: UP 光Rx: Yes UNI Link: UP UNI Link: UP LF ! ONU UNI - SW間 L2終端 ビット透過パターン A ONU A ONU Z Z EtherLink: DOW 光Rx: Yes EtherLink: DOWN 光Rx: Yes UNI Link: DOWN UNI Link: DOWN ! LF RF RF A ONU A ONU Z Z EtherLink: DOWN 光Rx: Yes UNI Link: DOWN UNI Link: UP LF EtherLink: DOW 光Rx: YES RF ! RF ビット透過パターン

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A ONU A ONU Z Z EtherLink: UP 光Rx: Yes EtherLink: UP 光Rx: Yes UNI Link: UP UNI Link: UP パターン4: LinkDown転送 OFF Automatic Laser Shutdown ON A ONU A ONU Z Z EtherLink: UP 光Rx: Yes EtherLink: DOWN 光Rx: Yes UNI Link: UP UNI Link: DOWN A ONU A ONU Z Z EtherLink: DOWN 光Rx: NO EtherLink: UP 光Rx: Yes UNI Link: DOWN UNI Link: DOWN ! RF RF LF LF ! ONU UNI - SW間 L2終端 ビット透過パターン ! LF A ONU A ONU Z Z EtherLink: UP 光Rx: Yes EtherLink: DOWN 光Rx: Yes UNI Link: UP UNI Link: DOWN A ONU A ONU Z Z EtherLink: DOWN 光Rx: NO EtherLink: UP 光Rx: Yes UNI Link: DOWN UNI Link: DOWN ! RF RF LF LF ! ! LF IDLE IDLE