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STP(Spanning-Tree Protocol) 스패닝 트리란?
STP(Spanning-Tree Protocol) 스패닝 트리란?
STP(Spanning-Tree Protocol)네트워크 구성시 이중화 설계를 할때 Loop 방지를 위해 만들어진 알고리즘신장 트리, 스패닝 트리, 생성 나무 로 불림CST(Common Spanning Tree), PVST(Per Vlan Spanning Tree), PVST+, RSTP, PVRST
networkinfracloud.tistory.com
VLAN를 이용한 HSRP, STP 실습
예상 구성도 작성, 게이트웨이 이중화를 위해 VIP를 .254로 설정했다.
외부 통신을 테스트 하기 위해 WAN라우터를 추가했다.
R1-WAN 구간 IP 부여, OSPF 추가
R1(config)#int se 0/0/0
R1(config-if)#ip add 8.8.8.7 255.255.255.240
R1(config-if)#no sh
%LINK-5-CHANGED: Interface Serial0/0/0, changed state to down
R1(config-if)#exit
R1(config)#int gi 0/0
R1(config-if)#ip add 10.10.10.1 255.255.255.252
R1(config-if)#no sh
%LINK-5-CHANGED: Interface GigabitEthernet0/0, changed state to up
%LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/0, changed state to up
R1(config-if)#exit
R1(config)#int gi 0/1
R1(config-if)#ip add 20.20.20.1 255.255.255.252
R1(config-if)#no sh
%LINK-5-CHANGED: Interface GigabitEthernet0/1, changed state to up
%LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/1, changed state to up
R1(config-if)#exit
R1(config)#route ospf 10
R1(config-router)#router
R1(config-router)#router-id 10.10.10.1
R1(config-router)#network 10.10.10.0 0.0.0.3 area 10
R1(config-router)#exit
R1(config)#route ospf 20
R1(config-router)#router-id 20.20.20.1
R1(config-router)#network 20.20.20.0 0.0.0.3 area 20
R1(config-router)#exit
WAN 라우터 IP 추가, Static routing 설정
WAN(config)#int se 0/0/0
WAN(config-if)#ip add 8.8.8.8 255.255.255.240
WAN(config-if)#no sh
%LINK-5-CHANGED: Interface Serial0/0/0, changed state to up
%LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0/0/0, changed state to up
WAN(config-if)#exit
WAN(config)#ip route 0.0.0.0 0.0.0.0 8.8.8.7
WAN(config)#exit
L3#1 VLAN 설정, OSPF 설정
L3#1(config)#int vl 1
L3#1(config-if)#no sh
%LINK-5-CHANGED: Interface Vlan1, changed state to up
%LINEPROTO-5-UPDOWN: Line protocol on Interface Vlan1, changed state to up
L3#1(config-if)#ip add 192.168.1.200 255.255.255.0
L3#1(config-if)#exit
L3#1(config)#ip routing
L3#1(config)#route ospf 10
L3#1(config-router)#router-id 192.168.1.200
L3#1(config-router)#net 10.10.10.0 0.0.0.3 area 10
L3#1(config-router)#exit
L3#1(config)#int gi 0/1
L3#1(config-if)#no sw
%LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/1, changed state to down
%LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/1, changed state to up
L3#1(config-if)#ip add 10.10.10.2 255.255.255.252
L3#1(config-if)#exit
00:56:38: %OSPF-5-ADJCHG: Process 10, Nbr 10.10.10.1 on GigabitEthernet0/1 from LOADING to FULL, Loading Done
L3#2 VLAN 설정, OSPF 설정
L3#2(config)#int vl 1
L3#2(config-if)#no sh
%LINK-5-CHANGED: Interface Vlan1, changed state to up
%LINEPROTO-5-UPDOWN: Line protocol on Interface Vlan1, changed state to up
L3#2(config-if)#ip add 192.168.1.201 255.255.255.0
L3#2(config-if)#ex
L3#2(config)#ip routing
L3#2(config)#route ospf 20
L3#2(config-router)#router-id 192.168.1.201
L3#2(config-router)#net 20.20.20.0 0.0.0.3 area 20
L3#2(config-router)#exit
L3#2(config)#int gi 0/1
L3#2(config-if)#no sw
%LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/1, changed state to down
%LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/1, changed state to up
L3#2(config-if)#ip add 20.20.20.2 255.255.255.252
L3#2(config-if)#exit
00:58:47: %OSPF-5-ADJCHG: Process 20, Nbr 20.20.20.1 on GigabitEthernet0/1 from LOADING to FULL, Loading Done
L3#1, L3#2 OSPF 상태 확인
L3#1#sh ip ospf nei
Neighbor ID Pri State Dead Time Address Interface
10.10.10.1 1 FULL/DR 00:00:37 10.10.10.1 GigabitEthernet0/1
---------------------------------------------------------------------------------------
L3#2#sh ip ospf nei
Neighbor ID Pri State Dead Time Address Interface
20.20.20.1 1 FULL/DR 00:00:38 20.20.20.1 GigabitEthernet0/1
L3#1, L3#2 VLAN HSRP(VRRP) 설정
L3#1(config)#int vl 1
L3#1(config-if)#standby ip 192.168.1.254
L3#1(config-if)#standby preempt
L3#1(config-if)#standby time 5 30 // 5초마다 hello 패킷 송수신, 끊김 발생시 30초후 주도권 가짐
L3#1(config-if)#standby track gigabitEthernet 0/1 // 포트 장애 발생시 대체 포트 지정
L3#1(config-if)#standby priority 200 // 기본값 100, 높을수록 우선순위
L3#1(config-if)#exit
%HSRP-6-STATECHANGE: Vlan1 Grp 0 state Speak -> Standby
%HSRP-6-STATECHANGE: Vlan1 Grp 0 state Standby -> Active
--------------------------------------------------------------------------------------------
L3#2(config)#int vl 1
L3#2(config-if)#sta ip 192.168.1.254
L3#2(config-if)#sta pree
L3#2(config-if)#sta time 5 30
L3#2(config-if)#sta tra gi 0/1
L3#2(config-if)#exit
%HSRP-6-STATECHANGE: Vlan1 Grp 0 state Speak -> Standby
L3#1, L3#2 HSRP 상태 확인
L3#1#sh stan
Vlan1 - Group 0
State is Active // Active, Standby 확인
6 state changes, last state change 01:02:00
Virtual IP address is 192.168.1.254 // VIP 확인
Active virtual MAC address is 0000.0C07.AC00
Local virtual MAC address is 0000.0C07.AC00 (v1 default)
Hello time 5 sec, hold time 30 sec // tiem 확인
Next hello sent in 1.46 secs
Preemption enabled // preempt 확인
Active router is local
Standby router is 192.168.1.201 // 이웃 라우터 확인
Priority 200 (configured 200) // 우선순위 확인
Track interface GigabitEthernet0/1 state Up decrement 10 // Track 확인
Group name is hsrp-Vl1-0 (default)
L3#1#
----------------------------------------------------------------
L3#2#sh stan
Vlan1 - Group 0
State is Standby
3 state changes, last state change 01:04:05
Virtual IP address is 192.168.1.254
Active virtual MAC address is 0000.0C07.AC00
Local virtual MAC address is 0000.0C07.AC00 (v1 default)
Hello time 5 sec, hold time 30 sec
Next hello sent in 1.24 secs
Preemption enabled
Active router is 192.168.1.200
Standby router is local
Priority 100 (default 100)
Track interface GigabitEthernet0/1 state Up decrement 10
Group name is hsrp-Vl1-0 (default)
L3#2#
PC단에서 Gateway, L3#1, L3#2로 핑이 잘나가는지 확인
OSPF 대역으로 핑이 잘나가는지 확인
L3#1의 OSPF 인터페이스까지는 통신이 가능하나 L3#2 OSPF 인터페이스와 라우터 인터페이스는 통신이 불가하다.
R1, L3#1, L3#2의 라우팅 테이블 확인.
R1#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, E - EGP
i - IS-IS, 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
8.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
C 8.8.8.0/28 is directly connected, Serial0/0/0
L 8.8.8.7/32 is directly connected, Serial0/0/0
10.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
C 10.10.10.0/30 is directly connected, GigabitEthernet0/0
L 10.10.10.1/32 is directly connected, GigabitEthernet0/0
20.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
C 20.20.20.0/30 is directly connected, GigabitEthernet0/1
L 20.20.20.1/32 is directly connected, GigabitEthernet0/1
R1#
-------------------------------------------------------------------------------------
L3#1#sh ip route
Codes: C - connected, S - static, I - IGRP, 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, E - EGP
i - IS-IS, 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
10.0.0.0/30 is subnetted, 1 subnets
C 10.10.10.0 is directly connected, GigabitEthernet0/1
C 192.168.1.0/24 is directly connected, Vlan1
L3#1#
------------------------------------------------------------------------
L3#2#sh ip route
Codes: C - connected, S - static, I - IGRP, 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, E - EGP
i - IS-IS, 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
20.0.0.0/30 is subnetted, 1 subnets
C 20.20.20.0 is directly connected, GigabitEthernet0/1
C 192.168.1.0/24 is directly connected, Vlan1
L3#2#우선 R1 쪽 테이블에 192.168.1.0 과 관련된 테이블이 없어 올라가지 못하고 있는 상황, L3#2의 테이블에는 들어가있지만 HSRP 구성으로 L3#1을 거쳐 길을 찾을려하기때문에 20.20.20.2의 길을 못가고있는 상황이다.
L3#1, L3#2의 STP 확인
L3#1#sh spanning-tree
VLAN0001
Spanning tree enabled protocol ieee
Root ID Priority 32769
Address 0001.649D.C189
Cost 23
Port 24(FastEthernet0/24)
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Bridge ID Priority 32769 (priority 32768 sys-id-ext 1)
Address 0003.E4B0.09E7
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Aging Time 20
Interface Role Sts Cost Prio.Nbr Type
---------------- ---- --- --------- -------- --------------------------------
Gi0/2 Altn BLK 4 128.26 P2p
Fa0/24 Root FWD 19 128.24 P2p
---------------------------------------------------------------------------------------------
L3#2#sh spanning-tree
VLAN0001
Spanning tree enabled protocol ieee
Root ID Priority 32769
Address 0001.649D.C189
Cost 19
Port 24(FastEthernet0/24)
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Bridge ID Priority 32769 (priority 32768 sys-id-ext 1)
Address 00D0.BC18.2A93
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Aging Time 20
Interface Role Sts Cost Prio.Nbr Type
---------------- ---- --- --------- -------- --------------------------------
Fa0/24 Root FWD 19 128.24 P2p
Gi0/2 Desg FWD 4 128.26 P2p
L3#2#L3#1에서 라우터를 통해 가야하는데 상단에 설명했듯이 라우터에는 192.168.1.0 라우팅 테이블이 없어 내려가지 못해 핑이 나가지 않는 상태
L3#1, L3#2 Root bridge 설정
L3#1(config)#spanning-tree ?
mode Spanning tree operating mode
portfast Spanning tree portfast options
vlan VLAN Switch Spanning Tree
L3#1(config)#spanning-tree vlan 1 ?
priority Set the bridge priority for the spanning tree
root Configure switch as root
L3#1(config)#spanning-tree vlan 1 root ?
primary Configure this switch as primary root for this spanning tree
secondary Configure switch as secondary root
L3#1(config)#spanning-tree vlan 1 root primary
---------------------------------------------------------------------------------------
L3#2(config)#spanning-tree vl 1 root secondary
L3#1, L3#2 SPT 확인
L3#1#sh sp
VLAN0001
Spanning tree enabled protocol ieee
Root ID Priority 24577
Address 0003.E4B0.09E7
This bridge is the root
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Bridge ID Priority 24577 (priority 24576 sys-id-ext 1)
Address 0003.E4B0.09E7
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Aging Time 20
Interface Role Sts Cost Prio.Nbr Type
---------------- ---- --- --------- -------- --------------------------------
Gi0/2 Desg FWD 4 128.26 P2p
Fa0/24 Desg FWD 19 128.24 P2p
L3#1#
----------------------------------------------------------------------------------------
L3#2#sh sp
VLAN0001
Spanning tree enabled protocol ieee
Root ID Priority 24577
Address 0003.E4B0.09E7
Cost 4
Port 26(GigabitEthernet0/2)
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Bridge ID Priority 28673 (priority 28672 sys-id-ext 1)
Address 00D0.BC18.2A93
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Aging Time 20
Interface Role Sts Cost Prio.Nbr Type
---------------- ---- --- --------- -------- --------------------------------
Fa0/24 Desg FWD 19 128.24 P2p
Gi0/2 Root FWD 4 128.26 P2p
L3#2#이전과 다르게 BLK 에서 FWD상태로 변경되었다.
20.20.20.2 로 핑테스트 확인
여전히 핑이 안가는 상태
L3#1를 끊어보자
L3#1을 끊자 20.20.20.2 까지 핑은 잘나가고 20.20.20.1의 핑은 불가하다.
R1 정적 라우팅 설정
R1(config)#ip route 192.168.1.0 255.255.255.0 20.20.20.2
핑이 잘가는것을 확인
WAN 통신을 위해 R1에서 정적 라우팅 설정
R1(config)#ip route 0.0.0.0 0.0.0.0 8.8.8.8
라우터에서 열어줫음에도 가지 않는다.
아마 OSPF라우팅 프로토콜이 상단에 WAN IP까지 가는길을 찾지 못해서 발생하는 현상 같다. 테이블 확인해보자
R1#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, E - EGP
i - IS-IS, 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 8.8.8.8 to network 0.0.0.0
8.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
C 8.8.8.0/28 is directly connected, Serial0/0/0
L 8.8.8.7/32 is directly connected, Serial0/0/0
20.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
C 20.20.20.0/30 is directly connected, GigabitEthernet0/1
L 20.20.20.1/32 is directly connected, GigabitEthernet0/1
S 192.168.1.0/24 [1/0] via 20.20.20.2
S* 0.0.0.0/0 [1/0] via 8.8.8.8
R1#8.8.8.8 가는 길도있다. 라우터는 문제가 없어보인다.
L3#2 라우팅 테이블 확인
L3#2#sh ip route
Codes: C - connected, S - static, I - IGRP, 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, E - EGP
i - IS-IS, 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
20.0.0.0/30 is subnetted, 1 subnets
C 20.20.20.0 is directly connected, GigabitEthernet0/1
C 192.168.1.0/24 is directly connected, Vlan1
L3#2#
8.8.8.8 로가는길이 보이지 않는다.
해결방법이 생각나지 않는다면, 해당 게시글을 보고 생각하도록 해보자.
라우팅(Routeing)의 개념과 종류(RIP, IGP, EIGRP, OSPF, BGP)
라우팅(Routeing)의 개념과 종류(RIP, IGP, EIGRP, OSPF, BGP)
라우팅(Routing)이란?라우팅은 네트워크 안에서 통신 데이터를 보낼 때 최적의 경로를 선택하는 과정을 라우팅이라 부릅니다.여기서 최적의 경로라 함은, 데이터를 가장 짧은 거리 또는 가장 적은
networkinfracloud.tistory.com
라우팅 프로토콜(RIP, EIGRP, OSPF, BGP) 실습 - Packet Tracer
라우팅 프로토콜(RIP, EIGRP, OSPF, BGP) 실습 - Packet Tracer
라우팅 프로토콜이란? 라우팅(Routeing)의 개념과 종류(RIP, IGP, EIGRP, OSPF, BGP)라우팅(Routing)이란?라우팅은 네트워크 안에서 통신 데이터를 보낼 때 최적의 경로를 선택하는 과정을 라우팅이라 부릅
networkinfracloud.tistory.com
R1, L3#2 재분배 설정
R1(config)#route ospf 20
R1(config-router)#redistribute connected subnets
R1(config-router)#exit
---------------------------------------------------------------------------------
L3#2(config)#route ospf 20
L3#2(config-router)#redistribute connected subnets
L3#2(config-router)#exitOSPF 에서 connected 된 테이블을 공유 시켜주면
R1, L3#2 라우팅 테이블 확인
R1#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, E - EGP
i - IS-IS, 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 8.8.8.8 to network 0.0.0.0
8.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
C 8.8.8.0/28 is directly connected, Serial0/0/0
L 8.8.8.7/32 is directly connected, Serial0/0/0
20.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
C 20.20.20.0/30 is directly connected, GigabitEthernet0/1
L 20.20.20.1/32 is directly connected, GigabitEthernet0/1
O E2 192.168.1.0/24 [110/20] via 20.20.20.2, 00:18:28, GigabitEthernet0/1
S* 0.0.0.0/0 [1/0] via 8.8.8.8
R1#
-----------------------------------------------------------------------------
L3#2#sh ip route
Codes: C - connected, S - static, I - IGRP, 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, E - EGP
i - IS-IS, 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
8.0.0.0/28 is subnetted, 1 subnets
O E2 8.8.8.0 [110/20] via 20.20.20.1, 00:01:52, GigabitEthernet0/1
20.0.0.0/30 is subnetted, 1 subnets
C 20.20.20.0 is directly connected, GigabitEthernet0/1
C 192.168.1.0/24 is directly connected, Vlan1
L3#2#이런식으로 L3에서 8.8.8.8로 가는길도 보이고 R1에서 192.168.1.0 가는길도 보이기때문에 이전에 설정했던 정적 라우팅은 필요가 없어진다.
PC - WAN 통신 확인
R1, L3#1 재분배 설정
R1(config)#route ospf 10
R1(config-router)#red con sub
R1(config-router)#exit
-------------------------------------------------
L3#1(config)#route ospf 10
L3#1(config-router)#redistribute connected subnets
L3#1(config-router)#exit
R1, L3#1 라우팅 테이블 확인
R1#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, E - EGP
i - IS-IS, 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 8.8.8.8 to network 0.0.0.0
8.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
C 8.8.8.0/28 is directly connected, Serial0/0/0
L 8.8.8.7/32 is directly connected, Serial0/0/0
10.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
C 10.10.10.0/30 is directly connected, GigabitEthernet0/0
L 10.10.10.1/32 is directly connected, GigabitEthernet0/0
20.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
C 20.20.20.0/30 is directly connected, GigabitEthernet0/1
L 20.20.20.1/32 is directly connected, GigabitEthernet0/1
O E2 192.168.1.0/24 [110/20] via 20.20.20.2, 00:23:01, GigabitEthernet0/1
[110/20] via 10.10.10.2, 00:00:47, GigabitEthernet0/0
S* 0.0.0.0/0 [1/0] via 8.8.8.8
R1#
----------------------------------------------------------------
L3#1#sh ip route
Codes: C - connected, S - static, I - IGRP, 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, E - EGP
i - IS-IS, 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
8.0.0.0/28 is subnetted, 1 subnets
O E2 8.8.8.0 [110/20] via 10.10.10.1, 00:00:40, GigabitEthernet0/1
10.0.0.0/30 is subnetted, 1 subnets
C 10.10.10.0 is directly connected, GigabitEthernet0/1
20.0.0.0/30 is subnetted, 1 subnets
O E2 20.20.20.0 [110/20] via 10.10.10.1, 00:00:40, GigabitEthernet0/1
C 192.168.1.0/24 is directly connected, Vlan1
L3#1#
PC에서 최종 핑 체크
문제없이 WAN 까지 잘나간다.
완성된 구성도
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