Configuring static routing· 2

Configuring a static route· 2

Displaying and maintaining static routes 2

Static route configuration example· 3

Basic static route configuration example· 3

 

 

Static routes are manually configured. If a network's topology is simple, you only need to configure static routes for the network to work properly.

Static routes cannot adapt to network topology changes. If a fault or a topological change occurs in the network, the network administrator must modify the static routes manually.

Configuring a static route

Before you configure a static route, complete the following tasks:

·          Configure physical parameters for related interfaces.

·          Configure link-layer attributes for related interfaces.

·          Configure IP addresses for related interfaces.

The next hop address of a static route cannot be the IP address of a local interface. Otherwise, the static route does not take effect.

To configure a static route:

 

Step	Command	Remarks
1.       Enter system view.	system-view	N/A
2.       Configure a static route.	ip route-static dest-address { mask | mask-length } next-hop-address [ preference preference-value ]	By default, no static route is configured.

 

Displaying and maintaining static routes

 

Task	Command	Remarks
Display routing table information.	display ip routing-table [ verbose ] [ | { begin | exclude | include } regular-expression ]	Available in any view.

 

	NOTE: For information about the display ip routing-table command, see Layer 3 Command Reference.

 

Static route configuration example

Basic static route configuration example

Network requirements

The IP addresses and masks of the hosts and interfaces of the switches and the AP are shown in Figure 1. Configure static routes to ensure the IP connectivity between the host and the client.

Figure 1 Network diagram

 

Configuration procedure

1.        Configure IP addresses for interfaces. (Details not shown.)

2.        Configure static routes.

# Configure a default route on Switch A.

<SwitchA> system-view

[SwitchA] ip route-static 0.0.0.0 0.0.0.0 1.1.4.2

# Configure a static route on Switch B.

<SwitchB> system-view

[SwitchB] ip route-static 1.1.2.0 255.255.255.0 1.1.4.1

# Configure a default route on the AP.

<AP> system-view

[AP] ip route-static 0.0.0.0 0.0.0.0 1.1.3.3

3.        Configure the default gateways of the host and the client as 1.1.2.3 and 1.1.3.1, respectively. (Details not shown.)

4.        Verify the configuration.

# Display the routing table on Switch A.

[SwitchA] display ip routing-table

Routing Tables: Public                                                          

         Destinations : 7        Routes : 7                                    

                                                                               

Destination/Mask    Proto  Pre  Cost         NextHop         Interface         

                                                                               

0.0.0.0/0           Static 60   0            1.1.4.2         Vlan2             

1.1.2.0/24          Direct 0    0            1.1.2.3         Vlan3             

1.1.2.3/32          Direct 0    0            127.0.0.1       InLoop0           

1.1.4.0/30          Direct 0    0            1.1.4.1         Vlan2             

1.1.4.1/32          Direct 0    0            127.0.0.1       InLoop0            

127.0.0.0/8         Direct 0    0            127.0.0.1       InLoop0           

127.0.0.1/32        Direct 0    0            127.0.0.1       InLoop0           

# Display the routing table on Switch B.

[SwitchB] display ip routing-table

Routing Tables: Public                                                         

         Destinations : 7        Routes : 7                                    

                                                                               

Destination/Mask    Proto  Pre  Cost         NextHop         Interface         

                                                                               

1.1.2.0/24          Static 60   0            1.1.4.1         Vlan2             

1.1.3.0/24          Direct 0    0            1.1.3.3         Vlan1             

1.1.3.3/32          Direct 0    0            127.0.0.1       InLoop0           

1.1.4.0/30          Direct 0    0            1.1.4.2         Vlan2             

1.1.4.2/32          Direct 0    0            127.0.0.1       InLoop0           

127.0.0.0/8         Direct 0    0            127.0.0.1       InLoop0           

127.0.0.1/32        Direct 0    0            127.0.0.1       InLoop0           

# Display the routing table on AP.

[AP] display ip routing-table

Routing Table :                                                                

         Destinations : 5        Routes : 5                                    

                                                                               

Destination/Mask    Proto  Pre  Cost         NextHop         Interface         

                                                                               

0.0.0.0/0           Static 60   0            1.1.3.3         Vlan1             

1.1.3.0/24          Direct 0    0            1.1.3.1         Vlan1             

1.1.3.1/32          Direct 0    0            127.0.0.1       InLoop0           

127.0.0.0/8         Direct 0    0            127.0.0.1       InLoop0           

127.0.0.1/32        Direct 0    0            127.0.0.1       InLoop0           

# Ping the client on the host, assuming that Windows XP runs on the two hosts.

C:\Documents and Settings\Administrator>ping 1.1.3.2

 

Pinging 1.1.3.2 with 32 bytes of data:

 

Reply from 1.1.3.2: bytes=32 time=1ms TTL=125

Reply from 1.1.3.2: bytes=32 time=1ms TTL=125

Reply from 1.1.3.2: bytes=32 time=1ms TTL=125

Reply from 1.1.3.2: bytes=32 time=1ms TTL=125

 

Ping statistics for 1.1.3.2:

    Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),

Approximate round trip times in milli-seconds:

    Minimum = 1ms, Maximum = 1ms, Average = 1ms