(Advanced Network Technologies)

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???? 3 ?????????? ?????????? ?? ?????

• (Advanced Network Technologies)

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??????????

• Virtual LAN (VLAN)
• Spanning Tree Protocol (STP)
• Multicasting
• Port Aggregation (Trunking)
• Port Security
• Port Mirroring (Monitoring)
• Prioritization (QoS)

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VLAN
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(No Transcript)
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??????? (Trunk)
????????? IEEE 802.1q, Cisco ISL
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?????? VLAN

• ????????
• ????-????????
• ?????????
• ??????????
• ?? ???? ?? ???? (End-to-end)

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????????????? ????? VLAN
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??????????? ?????????
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Broadcast Storm
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????? ????? ?? ?????
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???????????? ?? ????????
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Spanning Tree Protocol (IEEE802.1d)
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????? ?? Root Bridge
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????????????? ?? ???? (BID)
?? ??????? ????????????? ??????
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???? ?? ????????
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??????????? ?? ???????
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????????? ?? ?????????
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Rapid STP (IEEE 802.1w)
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Multicasting
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Multicast ??????
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Multicast IP ??????

• 224.0.0.0 224.0.0.255 Reserved Link Local
  (TTL1)
• 224.0.1.0 - 238.255.255.255 Globally Scoped
  (224.0.1.1 NTP)
• 239.0.0.0 - 239.255.255.255 Limited Scope (Local
  AS)
• 233.0.0.0/8 ?? ????????? AS (3 ? 4 ???? AS
  Number

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Multicast MAC ?????

• 0x01-00-5E ?????????? 3 ????? ?? multicast IP
  ??????
• 224.1.10.10 -gt 01-00-5E-01-0A-0A

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Multicast ?????????

• ?? ????????????? ??? Multicast ????? Internet
  Group Management Protocol (IGMP) IETF. IGMP
  v.1, IGMP v.2, IGMP v.3
• ?? ?????????????
• Distance Vector Multicast Routing Protocol
  (DVMRP)
• Protocol Independent Multicast (PIM)
• Multicast Open Shortest Path First (MOSPF)
• Core-Based Trees (CBT)

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Port Aggregation (Link Aggregation, Trunking)
Link Aggregation Control Protocol (LACP) IEEE
802.3ad, 802.1AX-2008 Port Aggregation Protocol
(PAgP) Cisco Systems
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Port Security

• ???????
• ??? MAC ????? ???? ?? ???? ?? ????
• ??? MAC ????? ?? ???? ?? ???? ?? ????
• ????? MAC ?????? ???? ?? ??? ?? ????
• ????????
• Protect ?? ??????? ?? ??????????
• Restrict ????, ?? ???????? ??????
• Shutdown ????? ?????

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Port Mirroring (Monitoring)
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Quality of Service (QoS)

• ????????? ?? ??????????
• Loss (??????)
• Delay (?????????????)
• Jitter (??????? ??? ???????????????)
• Bandwidth (???????? ???????)
• Out-of-order (???????????)
• Errors (??????)

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?????????? ?? VoIP

• ?????? ??? 1
• ??????????? ????????????? ?? 150 ms
• Jitter ?? 30 ms
• 21 106 kbit/s ?????????? ????? (? ?????????? ??
  ??????????? ?????)

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?????? ?? QoS

• Best Effort ??????? ?? ???????? ??? ??????????
  (?????????? FIFO)
• Integrated Services (IntServ) ????????????
  ???????? ??????????? ?? ???????
• Differentiated Services (DiffServ) ????????????
  ? ????????????? ?? ???????, ?????????? ??
  ?????????

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????????????
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???????????? ?? ???? 3

• Type of Service (3 bit Precedence)
• Differentiated Service Code Point (DSCP)

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??????????? (Policing)
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?????????? (Shaping)
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????????? Token bucket
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???????????? (Scheduling)

• FIFO ??????

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?????? ? ????? (Weighted Fair Queuing, WFQ)
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Class-Based Weighted Fair Queuing (CBWFQ)
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Low Latency Queuing (LLQ) ?? VoIP