Hi all, I am configuring a Cisco 7600 router as DHCP server for my broadband clients. I am using DHCP snooping and ARP inspection for security reasons and the leased time expiration is set for 30 minutes and no excluded-address is configured. The problem is that I still can see some clients IP addresses lease expiration are Infinite in the DHCP binding! what could be the reason for this behavior and could be this some sort of attack!!
Here is my configuration of the DHCP server: ! ip dhcp pool DHCP-POOL network 192.168.48.0 255.255.240.0 default-router 192.168.48.1 dns-server x.x.x.x x.x.x.x domain-name domain.com lease 0 0 30 ! and here is the output of the DHCP binding: R1#show ip dhcp binding | include Infinite 192.168.50.50 001e.e58d.5f27 Infinite Automatic 192.168.50.93 0017.3f0c.9d47 Infinite Automatic 192.168.51.5 001e.e595.11b9 Infinite Automatic 192.168.56.239 001e.e595.1109 Infinite Automatic 192.168.56.251 0018.392d.94b5 Infinite Automatic 192.168.57.7 001e.e595.10f9 Infinite Automatic 192.168.57.77 0018.392d.9473 Infinite Automatic 192.168.58.76 001f.3c66.6d1d Infinite Automatic 192.168.58.133 0014.bf65.80f7 Infinite Automatic 192.168.58.137 001e.e58d.6671 Infinite Automatic 192.168.58.151 00c0.020d.91bf Infinite Automatic 192.168.58.162 001e.e595.1b23 Infinite Automatic 192.168.58.191 001e.e58d.6669 Infinite Automatic 192.168.58.218 0018.3937.a0d7 Infinite Automatic 192.168.58.231 0016.367b.086d Infinite Automatic Regards, Manaf _______________________________________________ cisco-nsp mailing list cisco-nsp@puck.nether.net https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/