4000 Router Series Layer 3 - IP Services Configuration Guide

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Fast forwarding configuration example

Network requirements

Enable fast forwarding on Router B.

Figure 63 Network diagram

Configuration procedure

1. Configure Router A:

# Configure the IP address of interface Ethernet 1/1.

<RouterA> system-view

[RouterA] interface ethernet1/1

[RouterA-Ethernet1/1] ip address 11.1.1.1 255.0.0.0

[RouterA-Ethernet1/1] quit

# Configure a static route.

[RouterA] ip route-static 22.1.1.0 255.0.0.0 11.1.1.2

2. Configure Router C:

# Configure the IP address of interface Ethernet 1/2.

<RouterC> system-view

[RouterC] interface ethernet 1/2

[RouterC-Ethernet1/2] ip address 22.1.1.2 255.0.0.0

[RouterC-Ethernet1/2] quit

# Configure a static route.

[RouterC] ip route-static 11.1.1.0 255.0.0.0 22.1.1.1

3. Configure Router B:

# Enable fast forwarding.

<RouterB> system-view

[RouterB] ip fast-forwarding

# Configure the IP addresses of interfaces Ethernet 1/1 and Ethernet 1/2.

[RouterB] interface ethernet1/1

[RouterB-Ethernet1/1] ip address 11.1.1.2 255.0.0.0

[RouterB-Ethernet1/1] quit

[RouterB] interface ethernet 1/2

[RouterB-Ethernet1/2] ip address 22.1.1.1 255.0.0.0

[RouterB-Ethernet1/2] quit

Router A

Router CRouter B

Eth1/1

11.1.1.1/8

Eth1/1

11.1.1.2/8

Eth1/2

22.1.1.1/8

Eth1/2

22.1.1.2/8