10-09-2013 11:51 PM - edited 03-04-2019 09:16 PM
Hi All,
The DHCP is running in cisco 3550 and we have upgraded the Desktop from XP to Win 7 , After upgrading the OS win 7 the dhcp is leased multiple IP address to single MAC address and the updated client record as in use, So dhcp pool got full .
Hence other users are not gettign IP address , If removed the win 7 pc from the network , everything started wotrking fine.
cst: %DHCPD-4-DECLINE_CONFLICT: DHCP address conflict: client 0100.262d.fba2.1a declined
10-09-2013 11:54 PM
Internet *.*.*.137 122 1cc1.de1f.8fe6 ARPA Vlan
Internet *.*.*.139 122 1cc1.de1f.8fe6 ARPA Vlan
Internet *.*.*.139 142 1cc1.de1f.8fe6 ARPA Vlan
Internet *.*.*.142 121 1cc1.de1f.8fe6 ARPA Vlan
Internet *.*.*.129 123 1cc1.de1f.8fe6 ARPA Vlan
Internet *.*.*.131 122 1cc1.de1f.8fe6 ARPA Vlan
Internet *.*.*.133 122 1cc1.de1f.8fe6 ARPA Vlan
Internet *.*.*.132 142 1cc1.de1f.8fe6 ARPA Vlan
Internet *.*.*.135 122 1cc1.de1f.8fe6 ARPA Vlan
Internet *.*.*.152 141 1cc1.de1f.8fe6 ARPA Vlan
Internet *.*.*.154 120 1cc1.de1f.8fe6 ARPA Vlan
Internet *.*.*.155 141 1cc1.de1f.8fe6 ARPA Vlan
Internet *.*.*.157 120 1cc1.de1f.8fe6 ARPA Vlan
Internet *.*.*.1* 141 1cc1.de1f.8fe6 ARPA Vlan
Internet *.*.*.1* 120 1cc1.de1f.8fe6 ARPA Vlan
Internet *.*.*.144 142 1cc1.de1f.8fe6 ARPA Vlan
Internet *.*.*.144 121 1cc1.de1f.8fe6 ARPA Vlan
Internet *.*.*.145 142 1cc1.de1f.8fe6 ARPA Vlan
Internet *.*.*.146 121 1cc1.de1f.8fe6 ARPA Vlan
Internet *.*.*.148 141 1cc1.de1f.8fe6 ARPA Vlan
Internet *.*.*.148 121 1cc1.de1f.8fe6 ARPA Vlan
Internet *.*.*.150 120 1cc1.de1f.8fe6 ARPA Vlan
Internet *.*.*.169 119 1cc1.de1f.8fe6 ARPA Vlan
Internet *.*.*.171 119 1cc1.de1f.8fe6 ARPA Vlan
Internet *.*.*.173 118 1cc1.de1f.8fe6 ARPA Vlan
Internet *.*.*.174 140 1cc1.de1f.8fe6 ARPA Vlan
Internet *.*.*.161 120 1cc1.de1f.8fe6 ARPA Vlan
Internet *.*.*.161 141 1cc1.de1f.8fe6 ARPA Vlan
Internet *.*.*.163 119 1cc1.de1f.8fe6 ARPA Vlan
Internet *.*.*.163 140 1cc1.de1f.8fe6 ARPA Vlan
Internet *.*.*.165 119 1cc1.de1f.8fe6 ARPA Vlan
Internet *.*.*.167 119 1cc1.de1f.8fe6 ARPA Vlan
Internet *.*.*.166 140 1cc1.de1f.8fe6 ARPA Vlan
Internet *.*.*.184 117 1cc1.de1f.8fe6 ARPA Vlan
Internet *.*.*.187 117 1cc1.de1f.8fe6 ARPA Vlan
Internet *.*.*.186 139 1cc1.de1f.8fe6 ARPA Vlan
Internet *.*.*.187 139 1cc1.de1f.8fe6 ARPA Vlan
Internet *.*.*.189 117 1cc1.de1f.8fe6 ARPA Vlan
Internet *.*.*.190 139 1cc1.de1f.8fe6 ARPA Vlan
Internet *.*.*.176 140 1cc1.de1f.8fe6 ARPA Vlan
Internet *.*.*.176 118 1cc1.de1f.8fe6 ARPA Vlan
Internet *.*.*.179 118 1cc1.de1f.8fe6 ARPA Vlan
Internet *.*.*.181 140 1cc1.de1f.8fe6 ARPA Vlan
Internet *.*.*.180 118 1cc1.de1f.8fe6 ARPA Vlan
Internet *.*.*.182 117 1cc1.de1f.8fe6 ARPA Vlan
Internet *.*.*.201 116 1cc1.de1f.8fe6 ARPA Vlan
Internet *.*.*.200 138 1cc1.de1f.8fe6 ARPA Vlan
Internet *.*.*.203 116 1cc1.de1f.8fe6 ARPA Vlan
Internet *.*.*.202 138 1cc1.de1f.8fe6 ARPA Vlan
Internet *.*.*.207 115 1cc1.de1f.8fe6 ARPA Vlan
Internet *.*.*.206 138 1cc1.de1f.8fe6 ARPA Vlan
Internet *.*.*.192 117 1cc1.de1f.8fe6 ARPA Vlan
Internet *.*.*.193 139 1cc1.de1f.8fe6 ARPA Vlan
Internet *.*.*.194 116 1cc1.de1f.8fe6 ARPA Vlan
Internet *.*.*.196 116 1cc1.de1f.8fe6 ARPA Vlan
Internet *.*.*.197 138 1cc1.de1f.8fe6 ARPA Vlan
Internet *.*.*.199 116 1cc1.de1f.8fe6 ARPA Vlan
Internet *.*.*.199 138 1cc1.de1f.8fe6 ARPA Vlan
Internet *.*.*.216 137 1cc1.de1f.8fe6 ARPA Vlan
Internet *.*.*.218 114 1cc1.de1f.8fe6 ARPA Vlan
Internet *.*.*.220 114 1cc1.de1f.8fe6 ARPA Vlan
Internet *.*.*.221 136 1cc1.de1f.8fe6 ARPA Vlan
Internet *.*.*.208 137 1cc1.de1f.8fe6 ARPA Vlan
Internet *.*.*.208 115 1cc1.de1f.8fe6 ARPA Vlan
Internet *.*.*.210 115 1cc1.de1f.8fe6 ARPA Vlan
Internet *.*.*.211 137 1cc1.de1f.8fe6 ARPA Vlan
Internet *.*.*.213 137 1cc1.de1f.8fe6 ARPA Vlan
Internet *.*.*.215 115 1cc1.de1f.8fe6 ARPA Vlan
10-10-2013 01:39 AM
Hi,
client 0100.262d.fba2.1a is getting an offer from the DHCP server but it issues a gratuitous ARP to verify this IP is not already on the network and it receives a reply so it sends a DECLINE to the server so it means the suggested IP for the server was not already assigned( not in its pool and no reply to ping) so it would be worth debugging this issue.
Could you clear the arp cache on the switch, turn on this debugging: debug ip dhcp server packet and also post output of sh run | s dhcp and sh ip dhcp pool and sh ip dhcp server statistic after plugging back the Win 7 machines.
At the same time can you sniff on the Windows 7 machine in promiscuous mode and filter on arp and udp port 67 or udp port 68 and attach capture file.
Regards
Alain
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10-11-2013 07:08 PM
What does the windows 7 machines event log say in regards to the conlicting address, it would be nice to see both sides of the story here.
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