Hello all,
I think Cisco IOS has got a problem with DHCP renewal : my ISP renew my public adress every 24 hours and my Cisco 1721 doesn't care about this renewal.
I tested several IOS without success and it works with others routers (Zyxel...).
In fact, my Cisco 1721 doesn't send broadcast when it needs to renew its adress, it still uses its unicast adress to renew dhcp lease.
Here's my log and conf :
24331: 023865: Apr 28 00:35:34.777 UTCS: Temp IP addr: 82.65.249.243 for peer on Interface: Ethernet0 24332: 023866: Apr 28 00:35:34.777 UTCS: Temp sub net mask: 255.255.255.0 24333: 023867: Apr 28 00:35:34.777 UTCS: DHCP Lease server: 82.65.249.254, state: 7 Releasing 24334: 023868: Apr 28 00:35:34.781 UTCS: DHCP transaction id: 1C54 24335: 023869: Apr 28 00:35:34.781 UTCS: Lease: 600 secs, Renewal: 60 secs, Rebind: 600 secs 24336: 023870: Apr 28 00:35:34.781 UTCS: Temp default-gateway addr: 82.65.249.254 24337: 023871: Apr 28 00:35:34.781 UTCS: Next timer fires after: 00:00:00 24338: 023872: Apr 28 00:35:34.781 UTCS: Retry count: 1 Client-ID: 0004.dd0c.ea06 24339: 023873: Apr 28 00:35:34.781 UTCS: Hostname: Tower 24340: 023874: Apr 28 00:35:34.781 UTCS: DHCP: SRelease placed Server ID option: 82.65.249.254 24341: 023875: Apr 28 00:35:34.781 UTCS: DHCP: SRelease: 259 bytes 24342: 023876: Apr 28 00:35:34.845 UTCS: DHCP: SRelease attempt # 2 for entry: 24343: 023877: Apr 28 00:35:34.845 UTCS: Temp IP addr: 82.65.249.243 for peer on Interface: Ethernet0 24344: 023878: Apr 28 00:35:34.845 UTCS: Temp sub net mask: 255.255.255.0 24345: 023879: Apr 28 00:35:34.845 UTCS: DHCP Lease server: 82.65.249.254, state: 7 Releasing 24346: 023880: Apr 28 00:35:34.845 UTCS: DHCP transaction id: 1C54 24347: 023881: Apr 28 00:35:34.845 UTCS: Lease: 600 secs, Renewal: 60 secs, Rebind: 600 secs 24348: 023882: Apr 28 00:35:34.845 UTCS: Temp default-gateway addr: 82.65.249.254 24349: 023883: Apr 28 00:35:34.845 UTCS: Next timer fires after: 00:00:00 24350: 023884: Apr 28 00:35:34.845 UTCS: Retry count: 2 Client-ID: 0004.dd0c.ea06 24351: 023885: Apr 28 00:35:34.845 UTCS: Hostname: Tower 24352: 023886: Apr 28 00:35:34.845 UTCS: DHCP: SRelease placed Server ID option: 82.65.249.254 24353: 023887: Apr 28 00:35:34.849 UTCS: DHCP: SRelease: 259 bytes 24354: 023888: Apr 28 00:35:34.849 UTCS: DHCP: Releasing ipl options: 24355: 023889: Apr 28 00:35:34.849 UTCS: Clearing default gateway and route to 82.65.249.254 24356: 023890: Apr 28 00:35:34.853 UTCS: Clearing DNS address 212.27.32.177 24357: 023891: Apr 28 00:35:34.857 UTCS: Clearing DNS address 213.228.0.212 24358: 023892: Apr 28 00:35:35.777 UTCS: DHCP: SRelease attempt # 3 for entry: 24359: 023893: Apr 28 00:35:35.777 UTCS: Temp IP addr: 82.65.249.243 for peer on Interface: Ethernet0 24360: 023894: Apr 28 00:35:35.777 UTCS: Temp sub net mask: 255.255.255.0 24361: 023895: Apr 28 00:35:35.777 UTCS: DHCP Lease server: 82.65.249.254, state: 7 Releasing 24362: 023896: Apr 28 00:35:35.777 UTCS: DHCP transaction id: 1C54 24363: 023897: Apr 28 00:35:35.777 UTCS: Lease: 600 secs, Renewal: 60 secs, Rebind: 600 secs 24364: 023898: Apr 28 00:35:35.777 UTCS: Next timer fires after: 00:00:01 24365: 023899: Apr 28 00:35:35.777 UTCS: Retry count: 3 Client-ID: 0004.dd0c.ea06 24366: 023900: Apr 28 00:35:35.777 UTCS: Hostname: Tower 24367: 023901: Apr 28 00:35:35.777 UTCS: DHCP: SRelease placed Server ID option: 82.65.249.254 24368: 023902: Apr 28 00:35:35.781 UTCS: DHCP: SRelease: 259 bytesversion 12.2 no service pad service tcp-keepalives-in service tcp-keepalives-out service timestamps debug datetime msec localtime show-timezone service timestamps log datetime msec localtime show-timezone service password-encryption service sequence-numbers ! hostname Tower ! logging buffered 4096 debugging no logging console ! clock timezone UTC 1 clock summer-time UTCS recurring aaa new-model ! ! aaa authentication login local_auth local aaa session-id common ip subnet-zero no ip source-route no ip gratuitous-arps ! ! ! no ip bootp server ip inspect audit-trail ip inspect udp idle-time 1800 ip inspect dns-timeout 7 ip inspect tcp idle-time 14400 ip inspect name autosec_inspect cuseeme timeout 3600 ip inspect name autosec_inspect ftp timeout 3600 ip inspect name autosec_inspect http timeout 3600 ip inspect name autosec_inspect rcmd timeout 3600 ip inspect name autosec_inspect realaudio timeout 3600 ip inspect name autosec_inspect smtp timeout 3600 ip inspect name autosec_inspect udp timeout 15 ip inspect name autosec_inspect tcp timeout 3600 ip audit notify log ip audit po max-events 100 ip cef ip ssh time-out 60 ip ssh authentication-retries 2 ip dhcp-client network-discovery informs 2 discovers 2 period 10 ! ! ! interface Ethernet0 description Connected to Internet ip address dhcp client-id Ethernet0 no ip redirects no ip unreachables no ip proxy-arp ip nat outside ip inspect autosec_inspect out half-duplex ! interface FastEthernet0 description Connected to LAN ip address 192.168.1.206 255.255.255.248 ip access-group 1 in no ip redirects no ip unreachables no ip proxy-arp ip nat inside speed auto ! ip nat inside source list 1 interface Ethernet0 overload ip nat inside source static tcp 192.168.1.205 49996 interface Ethernet0
49996 ip classless no ip http server ! ! ! logging trap debugging logging facility syslog logging 192.168.1.205 access-list 1 permit 192.168.1.200 0.0.0.7 no cdp runI turned of f my ACL on the interface facing the Internet...
Has anyone's got the same problem or any idea ?
Thanks