The infinite DHCP entry is probably a BOOTP client, which doesn't have the concept of a lease. There are knobs (ip dhcp bootp ignore) that can turn off bootp, and only allow DHCP. I think by default, it'll service both.
Chuck -----Original Message----- From: cisco-nsp-boun...@puck.nether.net [mailto:cisco-nsp-boun...@puck.nether.net] On Behalf Of Andy Saykao Sent: Monday, July 20, 2009 3:49 AM To: cisco-nsp@puck.nether.net Subject: [c-nsp] Strange NAT and DHCP Problem Hi All, Just a few questions about DHCP and some strange NAT entries. 1/ What can cause this strange NAT entry where there's no protocol, outside local/global defined??? I'm always seeing it in the NAT able. core2#sh ip nat trans Pro Inside global Inside local Outside local Outside global --- 210.15.240.8 172.16.75.111 --- --- Seems to be giving me a warning message whenever it can't use the inside global IP when there are active translations in place: %IPNAT-4-ADDR_ALLOC_FAILURE: Address allocation failed for 172.16.75.111, pool NAT-POOL might be exhausted 2/ How is it possible that a DHCP client (172.16.75.113) has been able to have their lease expiration time set to "infinite" when I haven't set any lease time within the DHCP config so it should default to 1 day (see below). 3/ Any reasons why a DHCP client might prefer to send their own Client-ID (0065) instead of their MAC address as shown for 172.16.75.111? (see below). core2#sh ip dhcp binding IP address Client-ID/ Lease expiration Type Hardware address 172.16.75.111 0065 Jul 21 2009 05:34 PM Automatic 172.16.75.113 0021.e9a0.777c Infinite Automatic The DHCP config is pretty straight forward: ip dhcp pool Wireless-512b network 172.16.75.0 255.255.255.0 domain-name netspace.net.au default-router 172.16.75.1 dns-server 210.15.254.240 210.15.254.241 Running on Cisco 7606 with IOS 12.2(18)SXF11. Thanks. -- Regards, Andy Saykao Systems Administrator Netspace Online Systems Pty Ltd Phone : 03 9811 0049 Mobile : 0401 422 406 Fax : 03 9811 0044 E-Mail : andy.say...@staff.netspace.net.au <blocked::mailto:andy.say...@staff.netspace.net.au> This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. Please notify the sender immediately by email if you have received this email by mistake and delete this email from your system. Please note that any views or opinions presented in this email are solely those of the author and do not necessarily represent those of the organisation. Finally, the recipient should check this email and any attachments for the presence of viruses. The organisation accepts no liability for any damage caused by any virus transmitted by this email. _______________________________________________ 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/ _______________________________________________ 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/