I've a c3640 Internet router recently upgraded to IOS 12.0.26 showing the following output in connection with the SHOW ARP commend despite that I did " clear ARP " just a minute ago:
Internet_II#sh arp
Protocol Address Age (min) Hardware Addr Type Interface
Internet 63.161.138.20 0 Incomplete ARPA
Internet 216.207.28.11 0 Incomplete ARPA
Internet 63.161.138.21 0 Incomplete ARPA
Internet 216.207.28.10 0 Incomplete ARPA
Internet 63.161.138.22 0 Incomplete ARPA
Internet 216.207.28.9 0 Incomplete ARPA
Internet 63.161.138.23 0 Incomplete ARPA
Internet 216.207.28.8 0 Incomplete ARPA
Internet 63.161.138.16 0 Incomplete ARPA
Internet 216.207.28.15 0 Incomplete ARPA
Internet 63.161.138.17 0 Incomplete ARPA
Internet 216.207.28.14 0 Incomplete ARPA
Internet 63.161.138.18 0 Incomplete ARPA
Internet 216.207.28.13 0 Incomplete ARPA
Internet 63.161.138.19 0 Incomplete ARPA
Internet 216.207.28.12 0 Incomplete ARPA
Internet 63.161.138.28 0 Incomplete ARPA
Internet 216.207.28.3 0 Incomplete ARPA
Internet 63.161.138.29 0 Incomplete ARPA
Internet 216.207.28.2 0 Incomplete ARPA
Internet 63.161.138.30 0 Incomplete ARPA
Internet 216.207.28.1 - 00d0.bad2.bd01 ARPA Ethernet0/0
Internet 63.161.138.31 0 Incomplete ARPA
What's the problem?
