ospf協(xié)議-資料下載頁
2025-08-01 14:43本頁面
【正文】 Version Type=1 Packet Length 8 32Bits Router ID Area ID Checksum Authentication 8 8 8 AuType Authentication OSPF Packet Header OSPF Packet Data Hello Interval Router Dead Interval Designated Router Backup Designated Router Neighbor Network Mask Options Router Priority Neighbor …… 智慧無盡 .創(chuàng)意無限 Hello報文捕獲 智慧無盡 .創(chuàng)意無限 數據庫描述報文 － Database Description Packet Version Type=2 Packet Length 8 32Bits Router ID Area ID Checksum Authentication 8 8 8 AuType Authentication Interface MTU DD Sequence Number LSA Headers Options 00000 I M MS OSPF Packet Header OSPF Packet Data 智慧無盡 .創(chuàng)意無限 鏈路狀態(tài)請求報文 － Link State Request Version Type=3 Packet Length 8 32Bits Router ID Area ID Checksum Authentication 8 8 8 AuType Authentication Link State Type Link State ID Advertising Router Link State Type Link State ID Advertising Router …… OSPF Packet Header OSPF Packet Data 智慧無盡 .創(chuàng)意無限 鏈路狀態(tài)更新報文 － Link State Update Version Type=4 Packet Length 8 32Bits Router ID Area ID Checksum Authentication 8 8 8 AuType Authentication Number of LSAs LSAs OSPF Packet Header OSPF Packet Data 智慧無盡 .創(chuàng)意無限 鏈路狀態(tài)應答報文 － Link State Acknowledgment Version Type=5 Packet Length 8 32Bits Router ID Area ID Checksum Authentication 8 8 8 AuType Authentication LSA Headers OSPF Packet Header OSPF Packet Data 智慧無盡 .創(chuàng)意無限 LSA報文格式 － Router LSA（ Type 1） Age Type=1 Options 8 32Bits Link State ID Advertising Router 0x00 Link ID 8 8 8 Number of Links Link Data LSA Header LSA Data Sequence Number 00000 V E B Checksum Length Link Type Metric Number of TOS TOS TOS Metric 0x00 …… Link ID Link Data 智慧無盡 .創(chuàng)意無限 LSA報文格式 － Network LSA（ Type 2） Age Type=2 Options 8 32Bits Link State ID Advertising Router Network Mask 8 8 8 Attached Router LSA Header LSA Data Sequence Number Checksum Length Attached Router …… Attached Router 智慧無盡 .創(chuàng)意無限 LSA報文格式 － Network and ASBR Summary LSA（ Type 3和 4） Age Type=3 or 4 Options 8 32Bits Link State ID Advertising Router Network Mask 8 8 8 Metric LSA Header LSA Data Sequence Number Checksum Length …… 0x00 TOS Metric TOS Metric 0x00 智慧無盡 .創(chuàng)意無限 LSA報文格式 － Autonomous System External LSA（ Type 5） Age Type=5 Options 8 32Bits Link State ID Advertising Router Network Mask 8 8 8 Metric LSA Header LSA Data Sequence Number Checksum Length …… 0000000 E Forwoarding Address External Route Tag TOS Metric TOS E Forwoarding Address External Route Tag Network Mask Metric 0000000 E Forwoarding Address External Route Tag 智慧無盡 .創(chuàng)意無限 OSPF網絡規(guī)劃 ? 層次化的網絡拓撲結構 ? 區(qū)域的邊界 ? 地址分配 VLSM,CIDR ? 每個區(qū)域內路由器的數量 ? 每個路由器的鄰居的個數 ? DR的選擇 ? 區(qū)域要連續(xù) ? 一般區(qū)域和骨干區(qū)域的多個連接 ? 路由器 ID ? LSA的控制 ? 安全 ? 擴展性：內存、帶寬、 CPU
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