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Dynamic Netowrk 구성내역 init

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      [![logo](https://www.hongsnet.net/images/logo.gif)](https://www.hongsnet.net)
      # www.hongsnet.net Internal Networking
      > 내부 관리망으로 사용되는 네트워킹 구성요소의 구축내역이며, 여기서 사용되는 기술은 Dynamic Routing Protocol 이다.
      ## Overview
      ![source_overview](./images/dynamic-routing.png)
      ## 구성목적 (**Deprecated**)
      - www.hongsnet.net 내부 네트워크 구조를 Dynamic Routing Protocol로 변경한다.
      - Dynamic Routing Protocol이 어떻게 동작하는지를 Review 한다.
      - Dynamic Routing Protocol로 변경 시 `어떤 서비스의 영향이 발생되는지를 Review` 한다.
      > 이 구성은 1G / 100M bps의 스위치로 혼재된 상태이기 때문에 2020년 01월부로 Deprecated 되었다.
      ## Dynamic Routing Protocol 구성요소
      - OSPF
      - EIGRP
      - RIP
      ## Network Switch 구성요소
      | NO | Protocol | Role | 역할 | IP | ServiceIP | 모델명 | 비고 |
      | ------ | ------ | ------ | ------ | ------ | ------ | ------ | ------ |
      | 1 | OSPF | **Area0** | `DR` | 10.10.10.1 | 192.168.200.0/24 | WS-C3750G-48TS-E | 1 Gbps |
      | 2 | OSPF | **Area0** | BDR | 10.10.10.2 | N/A | WS-C3560G-48TS-S | 1 Gbps |
      | 3 | OSPF | **Area0** | DROTHER | 20.20.20.2 | N/A |WS-C3560G-48TS-S |1 Gbps |
      | 4 | OSPF | **Area1** | N/A | 40.40.40.2 | N/A | WS-C3750-48TS-E |100 Mbps |
      | 5 | EIGRP | **Area0** | N/A | 30.30.30.2 | 172.24.0.0/16 | WS-C3750-48TS-S |100 Mbps |
      | 6 | EIGRP | **Area1** | N/A | 50.50.50.2 | 172.16.0.0/16 | WS-C3550-24-EMI |100 Mbps |
      | 8 | EIGRP | Layer2 | N/A | N/A | 172.16.0.0/16 | Cisco WS-C2950T-24 |100 Mbps, |
      | 9 | EIGRP | Layer2 | N/A | N/A | 172.16.0.0/16 | Cisco WS-C2950G-12-EI |100 Mbps |
      | 10 | RIP | N/A | N/A | N/A | 180.180.180.0/24 | Cisco WS-C3550-24-EMI |100 Mbps |
      ## Network Review **Key-Point**
      * [ ] `서로 다른 라우팅 프로토콜 간에는 재분배가 발생`되며, 이 설정이 반드시 존재해야 한다.
      * [ ] OSPF 프로토콜의 hello packet은 OSPF 네이버를 형성하고 유지하는데 사용되는 패킷 이다.
      * [ ] OSPF의 `DR`(Designated Router)는 프로토콜의 중심 라우터이며, `멀티액세스 네트워크`(이더넷과 같은 브로드캐스트가 지원되는 네트워크) 기반에서 동작된다. 즉, 위 구성과 같이 L3 Switch로 이루어진 OSPF 네트워크에서는
      * [ ] OSPF의 `BDR`(Backup DR)는 DR 라우터의 역할을 이어받을 수 있는 라우터 이다. 즉, `DR이 다운`되면, BDR이 DR이되며 BDR은 새로 선출한다. 만약 BDR이 다운되면, BDR을 새로 선출 한다.
      * [ ] OSPF의 `DROTHER`는 DR, BDR이 아닌 라우터를 뜻한다. 그리고 DROTHER 라우터끼리는 라우팅 정보를 교환하지 않는다.
      * [ ] OSPF의 Area1은 논브로드캐스트 네트워크로 구성되어 있으며, 시리얼로 서로 연결되어 있다.
      * [ ] 위의 구성과 같이 두 개 이상의 Area로 구성된 환경에서는 그 중 하나는 반드시 에어리어 번호를 0으로 설정해야 한다.
      ## Network Configuration
      > 아래의 내역은 `show running-config` 등과 같이 전체 내역을 표현하지않고, 핵심적인 부분만을 명시한다.
      - **OSPF `DR` Switch Configure**
      ```plaintext
      interface GigabitEthernet1/0/49
      description TO-OSPF-TB2-BDR-GigabitEthernet0/49
      no switchport
      ip address 10.10.10.1 255.255.255.252
      ip ospf message-digest-key 1 md5 7 14101A0F1B0A2D20377C656575
      ip ospf network broadcast
      !
      interface GigabitEthernet1/0/50
      description TO-OSPF-TB3-DROTHER-GigabitEthernet0/49
      no switchport
      ip address 20.20.20.1 255.255.255.252
      ip ospf message-digest-key 1 md5 7 14101A0F1B0A2D20377C656575
      ip ospf network broadcast
      !
      ...중략
      interface Vlan192
      ip address 192.168.200.1 255.255.255.0
      !
      router ospf 1
      router-id 1.1.1.1
      log-adjacency-changes
      area 0 authentication message-digest
      network 10.10.10.1 0.0.0.0 area 0
      network 20.20.20.1 0.0.0.0 area 0
      network 192.168.200.0 0.0.0.255 area 0
      !
      ```
      다음의 결과는 통신내역을 출력한 것이다.
      ```plaintext
      OSPF-DR#sh ip route
      Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP
      D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
      N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
      E1 - OSPF external type 1, E2 - OSPF external type 2
      i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
      ia - IS-IS inter area, * - candidate default, U - per-user static route
      o - ODR, P - periodic downloaded static route
      Gateway of last resort is not set
      50.0.0.0/30 is subnetted, 1 subnets
      O E2 50.50.50.0 [110/20] via 20.20.20.2, 7w0d, GigabitEthernet1/0/50
      100.0.0.0/24 is subnetted, 1 subnets
      C 100.100.100.0 is directly connected, Vlan100
      20.0.0.0/30 is subnetted, 1 subnets
      C 20.20.20.0 is directly connected, GigabitEthernet1/0/50
      O E2 172.16.0.0/16 [110/20] via 20.20.20.2, 7w0d, GigabitEthernet1/0/50
      O E2 172.24.0.0/16 [110/20] via 10.10.10.2, 7w0d, GigabitEthernet1/0/49
      C 192.168.200.0/24 is directly connected, Vlan192
      40.0.0.0/30 is subnetted, 1 subnets
      O IA 40.40.40.0 [110/2] via 20.20.20.2, 7w0d, GigabitEthernet1/0/50
      10.0.0.0/30 is subnetted, 1 subnets
      C 10.10.10.0 is directly connected, GigabitEthernet1/0/49
      60.0.0.0/30 is subnetted, 1 subnets
      O E2 60.60.60.0 [110/20] via 10.10.10.2, 7w0d, GigabitEthernet1/0/49
      30.0.0.0/30 is subnetted, 1 subnets
      O E2 30.30.30.0 [110/20] via 10.10.10.2, 7w0d, GigabitEthernet1/0/49
      180.180.0.0/24 is subnetted, 1 subnets
      O E2 180.180.180.0 [110/20] via 10.10.10.2, 7w0d, GigabitEthernet1/0/49
      ```
      - **OSPF** `BDR` Switch Configure
      ```plaintext
      interface GigabitEthernet0/49
      description FROM-OSPF-DR-GigabitEthernet1/0/49
      no switchport
      ip address 10.10.10.2 255.255.255.252
      ip ospf message-digest-key 1 md5 7 0708294859071E0E04465D5C53
      ip ospf network broadcast
      !
      interface GigabitEthernet0/50
      description FROM-EIGRP-TB2-GigabitEthernet1/0/49
      no switchport
      ip address 30.30.30.1 255.255.255.252
      !
      interface GigabitEthernet0/51
      description FROM-RIP-STORAGE-GigabitEthernet0/1
      no switchport
      ip address 60.60.60.1 255.255.255.252
      !
      ...중략
      router eigrp 1
      network 30.30.30.1 0.0.0.0
      redistribute rip metric 1000000 10 255 255 1500
      redistribute ospf 1 metric 1000000 10 255 255 1500
      eigrp router-id 1.1.1.1
      !
      router ospf 1
      router-id 1.1.2.1
      area 0 authentication message-digest
      redistribute eigrp 1 subnets
      redistribute rip subnets
      network 10.10.10.2 0.0.0.0 area 0
      !
      router rip
      version 2
      redistribute ospf 1 metric 1
      redistribute eigrp 1 metric 1
      network 60.0.0.0
      no auto-summary
      !
      ```
      다음은 라우팅테이블 내역을 출력한 것이다.
      ```plaintext
      OSPF-TB2-BDR#sh ip route
      Codes: L - local, C - connected, S - static, R - RIP, M - mobile, B - BGP
      D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
      N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
      E1 - OSPF external type 1, E2 - OSPF external type 2
      i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
      ia - IS-IS inter area, * - candidate default, U - per-user static route
      o - ODR, P - periodic downloaded static route, H - NHRP, l - LISP
      + - replicated route, % - next hop override
      Gateway of last resort is not set
      10.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
      C 10.10.10.0/30 is directly connected, GigabitEthernet0/49
      L 10.10.10.2/32 is directly connected, GigabitEthernet0/49
      20.0.0.0/30 is subnetted, 1 subnets
      O 20.20.20.0 [110/2] via 10.10.10.1, 7w0d, GigabitEthernet0/49
      30.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
      C 30.30.30.0/30 is directly connected, GigabitEthernet0/50
      L 30.30.30.1/32 is directly connected, GigabitEthernet0/50
      40.0.0.0/30 is subnetted, 1 subnets
      O IA 40.40.40.0 [110/3] via 10.10.10.1, 7w0d, GigabitEthernet0/49
      50.0.0.0/30 is subnetted, 1 subnets
      O E2 50.50.50.0 [110/20] via 10.10.10.1, 7w0d, GigabitEthernet0/49
      60.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
      C 60.60.60.0/30 is directly connected, GigabitEthernet0/51
      L 60.60.60.1/32 is directly connected, GigabitEthernet0/51
      O E2 172.16.0.0/16 [110/20] via 10.10.10.1, 7w0d, GigabitEthernet0/49
      D 172.24.0.0/16 [90/3072] via 30.30.30.2, 7w0d, GigabitEthernet0/50
      180.180.0.0/24 is subnetted, 1 subnets
      R 180.180.180.0 [120/1] via 60.60.60.2, 00:00:23, GigabitEthernet0/51
      192.168.1.0/24 is variably subnetted, 2 subnets, 2 masks
      C 192.168.1.0/24 is directly connected, Vlan192
      L 192.168.1.1/32 is directly connected, Vlan192
      O 192.168.200.0/24 [110/2] via 10.10.10.1, 7w0d, GigabitEthernet0/49
      ```
      - **OSPF** Area0 `DROTHER` Switch Configure
      ```plaintext
      interface GigabitEthernet0/49
      description TO-OSPF-DR-GigabitEthernet0/50
      no switchport
      ip address 20.20.20.2 255.255.255.252
      ip ospf message-digest-key 1 md5 7 121E0D1305050B0F397F727864
      ip ospf network broadcast
      ip ospf priority 0
      !
      interface GigabitEthernet0/50
      description TO-OSPF-AREA1-GigabitEthernet0/49
      no switchport
      ip address 40.40.40.1 255.255.255.252
      ip ospf message-digest-key 1 md5 7 0303530F110126475D5D4F5540
      ip ospf network point-to-point
      !
      ...중략
      router ospf 1
      router-id 1.1.3.1
      area 0 authentication message-digest
      area 1 authentication message-digest
      network 20.20.20.2 0.0.0.0 area 0
      network 40.40.40.1 0.0.0.0 area 1
      !
      ```
      다음은 라우팅테이블 내역을 출력한 것이다.
      ```plaintext
      OSPF-TB3-DROTHER#sh ip route
      Codes: L - local, C - connected, S - static, R - RIP, M - mobile, B - BGP
      D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
      N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
      E1 - OSPF external type 1, E2 - OSPF external type 2
      i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
      ia - IS-IS inter area, * - candidate default, U - per-user static route
      o - ODR, P - periodic downloaded static route, H - NHRP, l - LISP
      + - replicated route, % - next hop override
      Gateway of last resort is not set
      10.0.0.0/30 is subnetted, 1 subnets
      O 10.10.10.0 [110/2] via 20.20.20.1, 7w0d, GigabitEthernet0/49
      20.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
      C 20.20.20.0/30 is directly connected, GigabitEthernet0/49
      L 20.20.20.2/32 is directly connected, GigabitEthernet0/49
      30.0.0.0/30 is subnetted, 1 subnets
      O E2 30.30.30.0 [110/20] via 20.20.20.1, 7w0d, GigabitEthernet0/49
      40.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
      C 40.40.40.0/30 is directly connected, GigabitEthernet0/50
      L 40.40.40.1/32 is directly connected, GigabitEthernet0/50
      50.0.0.0/30 is subnetted, 1 subnets
      O E2 50.50.50.0 [110/20] via 40.40.40.2, 7w0d, GigabitEthernet0/50
      60.0.0.0/30 is subnetted, 1 subnets
      O E2 60.60.60.0 [110/20] via 20.20.20.1, 7w0d, GigabitEthernet0/49
      O E2 172.16.0.0/16 [110/20] via 40.40.40.2, 7w0d, GigabitEthernet0/50
      O E2 172.24.0.0/16 [110/20] via 20.20.20.1, 7w0d, GigabitEthernet0/49
      180.180.0.0/24 is subnetted, 1 subnets
      O E2 180.180.180.0 [110/20] via 20.20.20.1, 7w0d, GigabitEthernet0/49
      O 192.168.200.0/24 [110/2] via 20.20.20.1, 7w0d, GigabitEthernet0/49
      ```
      - **OSPF Area1 Switch Configure**
      ```plaintext
      interface GigabitEthernet1/0/1
      description FROM-OSPF-TB3-DROTHER-GigabitEthernet0/50
      no switchport
      ip address 40.40.40.2 255.255.255.252
      ip ospf message-digest-key 1 md5 7 14101A0F1B0A2D20377C656575
      ip ospf network point-to-point
      ip ospf priority 0
      !
      interface GigabitEthernet1/0/2
      description TO-EIGRP-TB3-GigabitEthernet0/1
      no switchport
      ip address 50.50.50.1 255.255.255.252
      !
      ...중략
      router eigrp 1
      redistribute ospf 1 metric 1000000 10 255 255 1500
      no auto-summary
      eigrp router-id 1.1.1.1
      network 50.50.50.1 0.0.0.0
      !
      router ospf 1
      router-id 1.1.4.1
      log-adjacency-changes
      area 1 authentication message-digest
      redistribute eigrp 1 subnets
      network 40.40.40.2 0.0.0.0 area 1
      !
      ```
      다음은 라우팅테이블 내역을 출력한 것이다.
      ```plaintext
      TB3-OSPF-AREA1# sh ip route
      Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP
      D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
      N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
      E1 - OSPF external type 1, E2 - OSPF external type 2
      i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
      ia - IS-IS inter area, * - candidate default, U - per-user static route
      o - ODR, P - periodic downloaded static route
      Gateway of last resort is not set
      50.0.0.0/30 is subnetted, 1 subnets
      C 50.50.50.0 is directly connected, GigabitEthernet1/0/2
      20.0.0.0/30 is subnetted, 1 subnets
      O IA 20.20.20.0 [110/2] via 40.40.40.1, 7w0d, GigabitEthernet1/0/1
      D 172.16.0.0/16 [90/3072] via 50.50.50.2, 7w0d, GigabitEthernet1/0/2
      O E2 172.24.0.0/16 [110/20] via 40.40.40.1, 7w0d, GigabitEthernet1/0/1
      O IA 192.168.200.0/24 [110/3] via 40.40.40.1, 7w0d, GigabitEthernet1/0/1
      40.0.0.0/30 is subnetted, 1 subnets
      C 40.40.40.0 is directly connected, GigabitEthernet1/0/1
      10.0.0.0/30 is subnetted, 1 subnets
      O IA 10.10.10.0 [110/3] via 40.40.40.1, 7w0d, GigabitEthernet1/0/1
      60.0.0.0/30 is subnetted, 1 subnets
      O E2 60.60.60.0 [110/20] via 40.40.40.1, 7w0d, GigabitEthernet1/0/1
      30.0.0.0/30 is subnetted, 1 subnets
      O E2 30.30.30.0 [110/20] via 40.40.40.1, 7w0d, GigabitEthernet1/0/1
      180.180.0.0/24 is subnetted, 1 subnets
      O E2 180.180.180.0 [110/20] via 40.40.40.1, 7w0d, GigabitEthernet1/0/1
      ```
      - **OSPF** BDR <-> EIGRP Switch Configure
      ```plaintext
      interface GigabitEthernet1/0/1
      description TO-OSPF-TB2-DROTHER-GigabitEthernet0/50
      no switchport
      ip address 30.30.30.2 255.255.255.252
      !
      ...중략
      interface Vlan24
      ip address 172.24.254.1 255.255.0.0
      !
      !
      router eigrp 1
      no auto-summary
      eigrp router-id 1.1.2.1
      eigrp stub connected summary
      network 30.30.30.2 0.0.0.0
      network 172.24.0.0
      !
      ```
      다음은 라우팅테이블 내역을 출력한 것이다.
      ```plaintext
      L3-EIGRP-TB2#sh ip route
      Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP
      D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
      N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
      E1 - OSPF external type 1, E2 - OSPF external type 2
      i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
      ia - IS-IS inter area, * - candidate default, U - per-user static route
      o - ODR, P - periodic downloaded static route
      Gateway of last resort is not set
      50.0.0.0/30 is subnetted, 1 subnets
      D EX 50.50.50.0 [170/5376] via 30.30.30.1, 7w0d, GigabitEthernet1/0/1
      20.0.0.0/30 is subnetted, 1 subnets
      D EX 20.20.20.0 [170/5376] via 30.30.30.1, 7w0d, GigabitEthernet1/0/1
      D EX 172.16.0.0/16 [170/5376] via 30.30.30.1, 7w0d, GigabitEthernet1/0/1
      C 172.24.0.0/16 is directly connected, Vlan24
      D EX 192.168.200.0/24 [170/5376] via 30.30.30.1, 7w0d, GigabitEthernet1/0/1
      40.0.0.0/30 is subnetted, 1 subnets
      D EX 40.40.40.0 [170/5376] via 30.30.30.1, 7w0d, GigabitEthernet1/0/1
      10.0.0.0/30 is subnetted, 1 subnets
      D EX 10.10.10.0 [170/5376] via 30.30.30.1, 7w0d, GigabitEthernet1/0/1
      60.0.0.0/30 is subnetted, 1 subnets
      D EX 60.60.60.0 [170/5376] via 30.30.30.1, 7w0d, GigabitEthernet1/0/1
      30.0.0.0/30 is subnetted, 1 subnets
      C 30.30.30.0 is directly connected, GigabitEthernet1/0/1
      180.180.0.0/24 is subnetted, 1 subnets
      D EX 180.180.180.0 [170/5376] via 30.30.30.1, 7w0d, GigabitEthernet1/0/1
      ```
      - **OSPF** Area1 <-> EIGRP Switch Configure
      ```plaintext
      nterface FastEthernet0/23
      description TO-L2_SWITCH-#2-Fa0/3
      switchport trunk encapsulation dot1q
      switchport trunk allowed vlan 16
      switchport mode trunk
      load-interval 30
      !
      interface FastEthernet0/24
      description TO-L2_SWITCH-#1-Fa0/3
      switchport trunk encapsulation dot1q
      switchport trunk allowed vlan 16
      switchport mode trunk
      load-interval 30
      !
      interface GigabitEthernet0/1
      description FROM-TB3-OSPF-AREA1-GigabitEthernet1/0/2
      no switchport
      ip address 50.50.50.2 255.255.255.252
      !
      interface GigabitEthernet0/2
      no switchport
      no ip address
      !
      interface Vlan1
      no ip address
      !
      interface Vlan16
      ip address 172.16.254.1 255.255.0.0
      !
      !
      router eigrp 1
      no auto-summary
      eigrp router-id 1.1.2.1
      network 50.50.50.2 0.0.0.0
      network 172.16.0.0
      !
      ```
      다음은 라우팅테이블 내역을 출력한 것이다.
      ```plaintext
      L3-TB3-EIGRP# sh ip route
      Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP
      D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
      N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
      E1 - OSPF external type 1, E2 - OSPF external type 2
      i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
      ia - IS-IS inter area, * - candidate default, U - per-user static route
      o - ODR, P - periodic downloaded static route
      Gateway of last resort is not set
      50.0.0.0/30 is subnetted, 1 subnets
      C 50.50.50.0 is directly connected, GigabitEthernet0/1
      20.0.0.0/30 is subnetted, 1 subnets
      D EX 20.20.20.0 [170/5376] via 50.50.50.1, 7w0d, GigabitEthernet0/1
      C 172.16.0.0/16 is directly connected, Vlan16
      D EX 172.24.0.0/16 [170/5376] via 50.50.50.1, 7w0d, GigabitEthernet0/1
      D EX 192.168.200.0/24 [170/5376] via 50.50.50.1, 7w0d, GigabitEthernet0/1
      40.0.0.0/30 is subnetted, 1 subnets
      D EX 40.40.40.0 [170/5376] via 50.50.50.1, 7w0d, GigabitEthernet0/1
      10.0.0.0/30 is subnetted, 1 subnets
      D EX 10.10.10.0 [170/5376] via 50.50.50.1, 7w0d, GigabitEthernet0/1
      60.0.0.0/30 is subnetted, 1 subnets
      D EX 60.60.60.0 [170/5376] via 50.50.50.1, 7w0d, GigabitEthernet0/1
      30.0.0.0/30 is subnetted, 1 subnets
      D EX 30.30.30.0 [170/5376] via 50.50.50.1, 7w0d, GigabitEthernet0/1
      180.180.0.0/24 is subnetted, 1 subnets
      D EX 180.180.180.0 [170/5376] via 50.50.50.1, 7w0d, GigabitEthernet0/1
      ```
      - **OSPF** BDR <-> RIP Switch Configure
      ```plaintext
      interface GigabitEthernet0/1
      description TO-OSPF-TB2-BDR-GigabitEthernet0/51
      no switchport
      ip address 60.60.60.2 255.255.255.252
      !
      ...중략
      nterface Vlan180
      ip address 180.180.180.1 255.255.255.0
      load-interval 30
      !
      interface Vlan192
      no ip address
      !
      router rip
      version 2
      network 60.0.0.0
      network 180.180.0.0
      no auto-summary
      !
      ```
      다음은 라우팅테이블 내역을 출력한 것이다.
      ```plaintext
      L3-RIP-STORAGE#sh ip route
      Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP
      D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
      N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
      E1 - OSPF external type 1, E2 - OSPF external type 2
      i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
      ia - IS-IS inter area, * - candidate default, U - per-user static route
      o - ODR, P - periodic downloaded static route
      Gateway of last resort is not set
      50.0.0.0/30 is subnetted, 1 subnets
      R 50.50.50.0 [120/1] via 60.60.60.1, 00:00:25, GigabitEthernet0/1
      20.0.0.0/30 is subnetted, 1 subnets
      R 20.20.20.0 [120/1] via 60.60.60.1, 00:00:25, GigabitEthernet0/1
      R 172.16.0.0/16 [120/1] via 60.60.60.1, 00:00:25, GigabitEthernet0/1
      R 172.24.0.0/16 [120/1] via 60.60.60.1, 00:00:25, GigabitEthernet0/1
      R 192.168.200.0/24 [120/1] via 60.60.60.1, 00:00:25, GigabitEthernet0/1
      40.0.0.0/30 is subnetted, 1 subnets
      R 40.40.40.0 [120/1] via 60.60.60.1, 00:00:25, GigabitEthernet0/1
      10.0.0.0/30 is subnetted, 1 subnets
      R 10.10.10.0 [120/1] via 60.60.60.1, 00:00:25, GigabitEthernet0/1
      60.0.0.0/30 is subnetted, 1 subnets
      C 60.60.60.0 is directly connected, GigabitEthernet0/1
      30.0.0.0/30 is subnetted, 1 subnets
      R 30.30.30.0 [120/1] via 60.60.60.1, 00:00:25, GigabitEthernet0/1
      180.180.0.0/24 is subnetted, 1 subnets
      C 180.180.180.0 is directly connected, Vlan180
      ```
      - **EIGRP** <-> L2#1 Switch Configure
      ```plaintext
      interface Port-channel1
      switchport access vlan 16
      switchport mode access
      load-interval 30
      flowcontrol send off
      !
      interface FastEthernet0/1
      description TO-HSRP#2_L2-Fa0/1-SWITCH_TRUNK
      switchport access vlan 16
      switchport mode access
      load-interval 30
      channel-group 1 mode active
      !
      interface FastEthernet0/2
      description TO-HSRP-ACTIVE_L3-Gi1/0/47
      switchport trunk allowed vlan 16
      switchport mode trunk
      load-interval 30
      !
      interface FastEthernet0/3
      description TO-HSRP-STANDBY_L3-Fa0/24
      switchport trunk allowed vlan 16
      switchport mode trunk
      load-interval 30
      !
      ...중략
      interface FastEthernet0/24
      description TO-HSRP#2-Fa0/12-SWITCH_TRUNK
      switchport access vlan 16
      switchport mode access
      load-interval 30
      channel-group 1 mode active
      !
      interface GigabitEthernet0/1
      !
      interface GigabitEthernet0/2
      !
      interface Vlan1
      no ip address
      no ip route-cache
      shutdown
      !
      interface Vlan16
      ip address 172.16.254.100 255.255.0.0
      no ip route-cache
      !
      ```
      - **EIGRP** <-> L2#1 Switch Configure
      ```plaintext
      !
      interface Port-channel1
      switchport access vlan 16
      switchport mode access
      load-interval 30
      flowcontrol send off
      !
      interface FastEthernet0/1
      description TO-HSRP#1-Fa0/1-SWITCH_TRUNK
      switchport access vlan 16
      switchport mode access
      load-interval 30
      channel-group 1 mode active
      !
      interface FastEthernet0/2
      description TO-HSRP-ACTIVE-L3_Gi1/0/45
      switchport trunk allowed vlan 16
      switchport mode trunk
      load-interval 30
      !
      interface FastEthernet0/3
      description TO-HSRP-STANDBY-L3_Fa0/23
      switchport access vlan 16
      switchport trunk allowed vlan 16
      switchport mode trunk
      load-interval 30
      !
      ...중략
      !
      interface FastEthernet0/12
      description TO-HSRP#1-Fa0/24-SWITCH_TRUNK
      switchport access vlan 16
      switchport mode access
      load-interval 30
      channel-group 1 mode active
      !
      interface GigabitEthernet0/1
      !
      interface GigabitEthernet0/2
      !
      interface Vlan1
      no ip address
      no ip route-cache
      shutdown
      !
      interface Vlan16
      ip address 172.16.254.200 255.255.0.0
      no ip route-cache
      load-interval 30
      !
      ```
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