Lab 3-1 Single-Area OSPF Link Costs and Interface Priorities

Topology

GNS檔案

R1
!
!Step 0: Basic Setting
conf t
hostname R1
no ip domain-lookup
end
!
!Step 1: Addressing
conf t
int lo 1
description Engineering Department
ip add 10.1.1.1 255.255.255.0
no sh
int fa 0/0
ip add 10.1.200.1 255.255.255.0
no sh
int s 0/0
ip add 10.1.100.1 255.255.255.0
no sh
end
!
!宣告正確的OSPF Network Type來讓Loopback介面送出正確的prefix
!conf t
int lo 1
ip ospf network point-to-point
end
!
!Step 2: Adding Physical Interfaces to OSPF
conf t
router ospf 1
network 10.1.100.0 0.0.0.255 area 0
network 10.1.200.0 0.0.0.255 area 0
!
!Step 4: Adding Loopback Interfaces to OSPF
conf t
router ospf 1
network 10.1.1.0 0.0.0.255 area 0
end
!
!Step 5: Modifying Link Costs in OSPF
conf t
int fa 0/0
ip ospf cost 50
end
!
!Step 6: Modifying Interface Priorities
conf t
int fa 0/0
ip ospf priority 10
end
!
!Step 3: OSPF show Commands
show ip protocols
show ip route
show ip ospf neighbor
show ip ospf interface fa 0/0
show ip ospf database

R2
!
!Step 0: Basic Setting
conf t
hostname R2
no ip domain-lookup
end
!
!Step 1: Addressing
conf t
int lo 2
description Marketing Department
ip add 10.1.2.1 255.255.255.0
no sh
int fa 0/0
ip add 10.1.200.2 255.255.255.0
no sh
int s 0/0
ip add 10.1.100.2 255.255.255.0
no sh
end
!
!宣告正確的OSPF Network Type來讓Loopback介面送出正確的prefix
!conf t
int lo 2
ip ospf network point-to-point
end
!
!Step 2: Adding Physical Interfaces to OSPF
conf t
router ospf 1
network 10.1.100.0 0.0.0.255 area 0
network 10.1.200.0 0.0.0.255 area 0
!
!Step 4: Adding Loopback Interfaces to OSPF
conf t
router ospf 1
network 10.1.2.0 0.0.0.255 area 0
end
!
!Step 5: Modifying Link Costs in OSPF
conf t
int fa 0/0
ip ospf cost 50
end
!Step 6: Modifying Interface Priorities
conf t
int fa 0/0
ip ospf priority 5
end

R3
!
!Step 0: Basic Setting
conf t
hostname R3
no ip domain-lookup
end
!
!Step 1: Addressing
conf t
int lo 3
description Accounting Department
ip add 10.1.3.1 255.255.255.0
no sh
int fa 0/0
ip add 10.1.200.3 255.255.255.0
no sh
end
!
!宣告正確的OSPF Network Type來讓Loopback介面送出正確的prefix
!conf t
int lo 3
ip ospf network point-to-point
end
!
!Step 2: Adding Physical Interfaces to OSPF
conf t
router ospf 1
network 10.1.200.0 0.0.0.255 area 0
!
!Step 4: Adding Loopback Interfaces to OSPF
conf t
router ospf 1
network 10.1.3.0 0.0.0.255 area 0
end
!
!Step 5: Modifying Link Costs in OSPF
conf t
int fa 0/0
ip ospf cost 50
end

OSPF Link Type

介面類型	Cost值
Asynchronous	10000
X25	5208
56Kbps Serial Link	1785
64Kbps Serial Link	1562
T1 1.544Mbps Serial Link	64
E1 2.048Mbps Serial Link	48
4Mbps Token Ring	25
Ethernet	10
16Mbps Token Ring	6
FDDI	1
ATM	1

show指令
show ip route
show ip protocol
show ip ospf
show ip ospf database
show ip ospf interface (介面 代號)
show ip ospf neighbor
show ip ospf neighbor detail

debug指令
debug ip ospf adj

參考文件
OSPF Design Guide