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CLI-based Configuration Guide - IP Unicast Routing

AR100, AR120, AR150, AR160, AR200, AR1200, AR2200, AR3200, and AR3600 V200R009

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Example for Configuring Basic OSPF Functions

Example for Configuring Basic OSPF Functions

Networking Requirements

As shown in Figure 5-35, all routers run OSPF, and the entire AS is divided into three areas. Router A and Router B serve as ABRs to forward routes between areas.

After the configuration, each router should learn the routes from the AS to all network segments.

Figure 5-35 Networking diagram of configuring basic OSPF functions

Configuration Roadmap

The configuration roadmap is as follows:

  1. Enable OSPF on each router.

  2. Specify network segments in different areas.

Procedure

  1. Configure an IP address for each interface.

    # Configure RouterA.

    <Huawei> system-view
[Huawei] sysname RouterA
[RouterA] interface gigabitethernet 1/0/0
[RouterA-GigabitEthernet1/0/0] ip address 192.168.0.1 24
[RouterA-GigabitEthernet1/0/0] quit
[RouterA] interface gigabitethernet 2/0/0
[RouterA-GigabitEthernet2/0/0] ip address 192.168.1.1 24
[RouterA-GigabitEthernet2/0/0] quit

    The configurations of RouterB, RouterC, RouterD, RouterE, and RouterF are similar to the configuration of RouterA, and are not mentioned here.

  2. Configure basic OSPF functions.

    # Configure Router A.

    [RouterA] router id 1.1.1.1
[RouterA] ospf
[RouterA-ospf-1] area 0
[RouterA-ospf-1-area-0.0.0.0] network 192.168.0.0 0.0.0.255
[RouterA-ospf-1-area-0.0.0.0] quit
[RouterA-ospf-1] area 1
[RouterA-ospf-1-area-0.0.0.1] network 192.168.1.0 0.0.0.255
[RouterA-ospf-1-area-0.0.0.1] quit
[RouterA-ospf-1] quit

    # Configure Router B.

    [RouterB] router id 2.2.2.2
[RouterB] ospf
[RouterB-ospf-1] area 0
[RouterB-ospf-1-area-0.0.0.0] network 192.168.0.0 0.0.0.255
[RouterB-ospf-1-area-0.0.0.0] quit
[RouterB-ospf-1] area 2
[RouterB-ospf-1-area-0.0.0.2] network 192.168.2.0 0.0.0.255
[RouterB-ospf-1-area-0.0.0.2] quit
[RouterB-ospf-1] quit

    # Configure Router C.

    [RouterC] router id 3.3.3.3
[RouterC] ospf
[RouterC-ospf-1] area 1
[RouterC-ospf-1-area-0.0.0.1] network 192.168.1.0 0.0.0.255
[RouterC-ospf-1-area-0.0.0.1] network 172.16.1.0 0.0.0.255
[RouterC-ospf-1-area-0.0.0.1] quit
[RouterC-ospf-1] quit

    # Configure Router D.

    [RouterD] router id 4.4.4.4
[RouterD] ospf
[RouterD-ospf-1] area 2
[RouterD-ospf-1-area-0.0.0.2] network 192.168.2.0 0.0.0.255
[RouterD-ospf-1-area-0.0.0.2] network 172.17.1.0 0.0.0.255
[RouterD-ospf-1-area-0.0.0.2] quit
[RouterD-ospf-1] quit

    # Configure Router E.

    [RouterE] router id 5.5.5.5
[RouterE] ospf
[RouterE-ospf-1] area 1
[RouterE-ospf-1-area-0.0.0.1] network 172.16.1.0 0.0.0.255
[RouterE-ospf-1-area-0.0.0.1] quit
[RouterE-ospf-1] quit

    # Configure Router F.

    [RouterF] router id 6.6.6.6
[RouterF] ospf
[RouterF-ospf-1] area 2
[RouterF-ospf-1-area-0.0.0.2] network 172.17.1.0 0.0.0.255
[RouterF-ospf-1-area-0.0.0.2] quit
[RouterF-ospf-1] quit

  3. Verify the configuration.

    # View OSPF neighbors of Router A.

    [RouterA] display ospf peer
              OSPF Process 1 with Router ID 1.1.1.1
                  Neighbors
 Area 0.0.0.0 interface 192.168.0.1(GigabitEthernet1/0/0)'s neighbors
Router ID: 2.2.2.2      Address: 192.168.0.2
   State: Full  Mode:Nbr is  Master  Priority: 1
   DR: 192.168.0.2  BDR: 192.168.0.1   MTU: 0
   Dead timer due in 36  sec
   Retrans timer interval: 5
   Neighbor is up for 00:15:04
   Authentication Sequence: [ 0 ]
                  Neighbors
 Area 0.0.0.1 interface 192.168.1.1(GigabitEthernet2/0/0)'s neighbors
Router ID: 3.3.3.3       Address: 192.168.1.2
   State: Full  Mode:Nbr is  Master  Priority: 1
   DR: 192.168.1.2  BDR: 192.168.1.1   MTU: 0
   Dead timer due in 39  sec
   Retrans timer interval: 5
   Neighbor is up for 00:07:32
   Authentication Sequence: [ 0 ]

    # View the OSPF routing information of Router A.

    [RouterA] display ospf routing
              OSPF Process 1 with Router ID 1.1.1.1
                   Routing Tables
 Routing for Network
 Destination      Cost  Type         NextHop         AdvRouter       Area
 172.16.1.0/24     2    Transit     192.168.1.2     3.3.3.3         0.0.0.1
 172.17.1.0/24     3    Inter-area  192.168.0.2     2.2.2.2         0.0.0.0
 192.168.0.0/24    1    Transit     192.168.0.1     1.1.1.1         0.0.0.0
 192.168.1.0/24    1    Transit     192.168.1.1     1.1.1.1         0.0.0.1
 192.168.2.0/24    2    Inter-area  192.168.0.2     2.2.2.2         0.0.0.0
 Total Nets: 5
 Intra Area: 3  Inter Area: 2  ASE: 0  NSSA: 0

    # View the LSDB of Router A.

    [RouterA] display ospf lsdb
              OSPF Process 1 with Router ID 1.1.1.1
                  Link State Database
                          Area: 0.0.0.0
 Type      LinkState ID    AdvRouter          Age  Len   Sequence   Metric
 Router    2.2.2.2         2.2.2.2            317  48    80000003    1
 Router    1.1.1.1         1.1.1.1            316  48    80000002    1
 Network   192.168.0.2     2.2.2.2            399  32    800000F8    0
 Sum-Net   172.16.1.0      1.1.1.1            250  28    80000001    2
 Sum-Net   172.17.1.0      2.2.2.2            203  28    80000001    2
 Sum-Net   192.168.2.0     2.2.2.2            237  28    80000002    1
 Sum-Net   192.168.1.0     1.1.1.1            295  28    80000002    1
                          Area: 0.0.0.1
Type      LinkState ID    AdvRouter          Age  Len   Sequence   Metric
 Router    5.5.5.5         5.5.5.5            214  36    80000004    1        
 Router    3.3.3.3         3.3.3.3            217  60    80000008    1
 Router    1.1.1.1         1.1.1.1            289  48    80000002    1
 Network   192.168.1.1     1.1.1.1            202  28    80000002    0
 Network   172.16.1.1      3.3.3.3            670  32    80000001    0
 Sum-Net   172.17.1.0      1.1.1.1            202  28    80000001    3
 Sum-Net   192.168.2.0     1.1.1.1            242  28    80000001    2
 Sum-Net   192.168.0.0     1.1.1.1            300  28    80000001    1

    # View the routing table of Router D and test connectivity by using the ping command.

    [RouterD] display ospf routing
              OSPF Process 1 with Router ID 4.4.4.4
                   Routing Tables
 Routing for Network
 Destination        Cost  Type       NextHop      AdvRouter       Area
 172.16.1.0/24      4  Inter-area 192.168.2.1     2.2.2.2         0.0.0.2
 172.17.1.0/24      1  Transit    172.17.1.1      4.4.4.4         0.0.0.2
 192.168.0.0/24     2  Inter-area 192.168.2.1     2.2.2.2         0.0.0.2
 192.168.1.0/24     3  Inter-area 192.168.2.1     2.2.2.2         0.0.0.2
 192.168.2.0/24     1  Transit    192.168.2.2     4.4.4.4         0.0.0.2
 Total Nets: 5
 Intra Area: 2  Inter Area: 3  ASE: 0  NSSA: 0
[RouterD] ping 172.16.1.1
  PING 172.16.1.1: 56  data bytes, press CTRL_C to break
    Reply from 172.16.1.1: bytes=56 Sequence=1 ttl=253 time=62 ms
    Reply from 172.16.1.1: bytes=56 Sequence=2 ttl=253 time=16 ms
    Reply from 172.16.1.1: bytes=56 Sequence=3 ttl=253 time=62 ms
    Reply from 172.16.1.1: bytes=56 Sequence=4 ttl=253 time=94 ms
    Reply from 172.16.1.1: bytes=56 Sequence=5 ttl=253 time=63 ms
  --- 172.16.1.1 ping statistics ---
    5 packet(s) transmitted
    5 packet(s) received
    0.00% packet loss
    round-trip min/avg/max = 16/59/94 ms

Configuration Files

  • Configuration file of Router A

    #
 sysname RouterA
#
router id 1.1.1.1
#
interface GigabitEthernet1/0/0
 ip address 192.168.0.1 255.255.255.0
#
interface GigabitEthernet2/0/0
 ip address 192.168.1.1 255.255.255.0
#
ospf 1
 area 0.0.0.0
  network 192.168.0.0 0.0.0.255
 area 0.0.0.1
  network 192.168.1.0 0.0.0.255
#
return

  • Configuration file of Router B

    #
 sysname RouterB
#
router id 2.2.2.2
#
interface GigabitEthernet1/0/0
 ip address 192.168.0.2 255.255.255.0
#
interface GigabitEthernet2/0/0
 ip address 192.168.2.1 255.255.255.0
#
ospf 1
 area 0.0.0.0
  network 192.168.0.0 0.0.0.255
 area 0.0.0.2
  network 192.168.2.0 0.0.0.255
#
return

  • Configuration file of Router C

    #
 sysname RouterC
#
router id 3.3.3.3
#
interface GigabitEthernet1/0/0
 ip address 192.168.1.2 255.255.255.0
#
interface GigabitEthernet2/0/0
 ip address 172.16.1.1 255.255.255.0
#
ospf 1
 area 0.0.0.1
  network 192.168.1.0 0.0.0.255
  network 172.16.1.0 0.0.0.255
#
return

  • Configuration file of Router D

    #
 sysname RouterD
#
router id 4.4.4.4
#
interface GigabitEthernet1/0/0
 ip address 192.168.2.2 255.255.255.0
#
interface GigabitEthernet2/0/0
 ip address 172.17.1.1 255.255.255.0
#
ospf 1
 area 0.0.0.2
  network 192.168.2.0 0.0.0.255
  network 172.17.1.0 0.0.0.255
#
return

  • Configuration file of Router E

    #
 sysname RouterE
#
router id 5.5.5.5
#
interface GigabitEthernet2/0/0
 ip address 172.16.1.2 255.255.255.0
#
ospf 1
 area 0.0.0.1
  network 172.16.1.0 0.0.0.255
#
return

  • Configuration file of Router F

    #
 sysname RouterF
#
router id 6.6.6.6
#
interface GigabitEthernet2/0/0
 ip address 172.17.1.2 255.255.255.0
#
ospf 1
 area 0.0.0.2
  network 172.17.1.0 0.0.0.255
#
return
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Updated: 2019-05-17

Document ID: EDOC1000174069

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