BPDU(Bridge Protocol Data Unit) 종류 Configuration BPDU Root SW를 선출하고 SW 포트의 역할을 지정 Root SW에서 2s마다 발생(Default) BPDU가 연속적으로 3개 Loss까지 허용 → 4개 Loss부터 장애라 판단 35Byte TCN(Topology Change Notification) BPDU 네트워크 망 변화 발생 시 변화했다는 것을 Root SW에게 알리기 위해 사용 항상 루트 SW 쪽으로 송신 4Byte BPDU Format BPDU Format STP의 BPDU : 35Byte RSTP의 BPDU : 36Byte RSTP의 BPDU는 STP의 Configuration BPDU와 유사 802.1d BPDU Header Frame Control 0x01 고정 DA(Destination Address) 수신지 MAC 주소 SA(Source Address) 송신지 MAC 주소 Logical Link ...
![[STP] STP BPDU Header](https://mblogthumb-phinf.pstatic.net/MjAyMjA2MDlfNDgg/MDAxNjU0NzQxMjgxNTk4.7k48mv1tcPMzCuN65-EQKT2KeEsJEfXH4NL2jYzpNx4g.5STo9BPKz-cVECFRsN7jo9AxTjjF5TVMPBuaYyO9-pog.PNG.choiyoonjun111/image.png?type=w2)
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8021dBPDUHeader
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ForwardDelay
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HelloTime
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MaxAge
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MessageAge
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PathCost
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PortID
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RootID
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STP
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TCNBPDU
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dot1qHeader
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ConfigurationBPDUHeader
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BPDU
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BPDUFlag
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BPDUFormat
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BPDUHeader
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BPDU종류
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BridgeID
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ConfigBPDU
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ConfigBPDUHeader
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ConfigurationBPDU
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TCNBPDUHeader
원문 링크 : [STP] STP BPDU Header
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