Hierarchical Routing
Interconnected ASes
![](https://blog.kakaocdn.net/dn/vkp33/btrP8KglIkc/nvUDetE0rJ66L6XC5MvY7K/img.png)
β AS(Autonomous Systems): κ°κ°μ λ€νΈμν¬λ€ λ΄λΆλ λ
립μ μΈ(μ체μ μΈ) λΌμ°ν
μμ€ν
(μκ³ λ¦¬μ¦)μ κ°μ§λ€.
β λ€νΈμν¬λ€μ λ€μ κ³μΈ΅μ μΌλ‘ μ°κ²°λμ΄μλ€.
Intra-AS routing
β AS λ΄λΆμμ λμνλ λΌμ°ν
νλ‘ν μ½
β Distance Vector, Link State
β μ΅μ λΉμ©, μ΅λ¨ κ²½λ‘λΌλ νμ€ν λͺ©μ
Inter-AS routing
β κ³μΈ΅μ μΌλ‘ μ°κ²°λ ASλ€μ μλ λΌμ°ν
νλ‘ν μ½
β Hierarchical routing (BGP)
β μ μΉμ , κ²½μ μ μ΄μ λ€λ‘ μ΅λ¨/μ΅μλΉμ© κ²½λ‘ λͺ©μ x
Relationships Between Networks
Provider - Customer κ΄κ³
![](https://blog.kakaocdn.net/dn/rc5in/btrP8XfrnK9/95ms2dkl02J2g60eOgkV6K/img.png)
β AS μ¬μ΄μλ Provider - Customer κ΄κ³κ° μ‘΄μ¬νλ€.
β μλμ μΈ κ΄κ³!
Peer-Peer κ΄κ³
![](https://blog.kakaocdn.net/dn/bofTbX/btrQb2TTZWt/YOspOzOlIdHEGUBvobengK/img.png)
β λμ΄ λΉμ·ν κ΄κ³μΌ κ²½μ° (ex - λ ν΅μ μ¬ κ° κ΄κ³)
![](https://blog.kakaocdn.net/dn/NnfPh/btrQbtqzg4l/XTbKx6QXjrSPrXIDkS8BT0/img.png)
β κ²μμ μ μ μ κ²½μ μ λ
Όλ¦¬λ‘ μΈν΄ μ°κ²°μ΄ λμ§ μλλ€.(μ΄λμ΄ μμ)
β ν΄λΉ κ²μμ μ μ μ μ΄μ΄μ£Όλ κ² BGP!
BGP
κ°μ
β BGP - Border Gateway Protocol
β Policy Based routing protocol
ex) AT&T Research-> Samsung Electronics
![](https://blog.kakaocdn.net/dn/mYMVm/btrP9BCXMNk/kmKFKhW8TrIKWAJH2RBSik/img.png)
β λ§μ κ³ κ°μ μ»μ μ μλ path μ ν
β κ²½λ‘λ₯Ό μ νν λ path λ΄μ λ€νΈμν¬ hostλ κ³ λ €ν΄μ νλ¨νκ² λλ€(Policy Based).
β Customer > Peer > Provider
Many choices
![](https://blog.kakaocdn.net/dn/Lb3u0/btrP9IaXkBM/QIJlywru1rj5UpuSy0ORj0/img.png)
β μ΅λ¨ κ²½λ‘κ° μλλΌ μμ μ΄ providerκ° λλλ‘ νλ pathλ₯Ό μ ννλ€.
β κ²°κ΅ BGPλ μ΅λ¨/μ΅μλΉμ© κ²½λ‘κ° μλ κ²½μ μ /μ μ± μ μμΈλ€μ κ³ λ €ν κ²½λ‘λ₯Ό κ²°μ νλ€.
'β Group_Study > Networking' μΉ΄ν κ³ λ¦¬μ λ€λ₯Έ κΈ
[8μ£Όμ°¨] LANs: Ethernet (0) | 2022.11.16 |
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[8μ£Όμ°¨] Link Layer : Introduction (0) | 2022.11.15 |
[7μ£Όμ°¨] Routing Algorithm: Distance Vector Algorithm (0) | 2022.11.08 |
[6μ£Όμ°¨] Routing Algorithm : Link State (1) | 2022.11.03 |
[6μ£Όμ°¨] ICMP, IPv6 (0) | 2022.11.01 |
λκΈ