4000 Router Series Layer 3 - IP Services Configuration Guide

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Verifying the configuration

# Display the fast forwarding table on Router B.

[RouterB] display ip fast-forwarding cache

No fast-forwarding entries.

The output shows that no fast forwarding entry exists.

# Ping the IP address of Ethernet 1/2 of Router C from Router A. Reply packets can be received.

[RouterA] ping 22.1.1.2

PING 22.1.1.2: 56 data bytes, press CTRL_C to break

Reply from 22.1.1.2: bytes=56 Sequence=1 ttl=254 time=2 ms

Reply from 22.1.1.2: bytes=56 Sequence=2 ttl=254 time=1 ms

Reply from 22.1.1.2: bytes=56 Sequence=3 ttl=254 time=1 ms

Reply from 22.1.1.2: bytes=56 Sequence=4 ttl=254 time=2 ms

Reply from 22.1.1.2: bytes=56 Sequence=5 ttl=254 time=2 ms

--- 22.1.1.2 ping statistics ---

5 packet(s) transmitted

5 packet(s) received

0.00% packet loss

round-trip min/avg/max = 2/2/3 ms

# Display the fast forwarding table on Router B.

[RouterB] display ip fast-forwarding cache

Total number of fast-forwarding entries: 2

SIP SPort DIP DPort Pro Input_If Output_If Flg

22.1.1.2 0 11.1.1.1 0 1 Eth1/2 Eth1/1 7

11.1.1.1 8 22.1.1.2 0 1 Eth1/1 Eth1/2 7

The output shows that fast forwarding entries have been created.