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Cisco 2611 and Cisco 1721 : Why , why , why ?????

Hello,

Again i post about my problem (see below)

I tried with two other IOS : 12.2(16) & 12.2(1a) instead of the

12.3(5.a) because someone told me of a possible bug of my ios version. The pb is still the same. Someone else seems to have the same pb as me with a cisco 1721 with an ethernet wic card.

Anybody can help ? Thanks Sam

A cisco 2611 is connected to the Internet on interface Ethernet0/1 with an ethernet ADSL modem. When you turn on the cisco, after his boot initialization, it get his ip address. But the ISP change the Internet address every two or three days, but the Cisco doesn't detect the new IP address send by the new ISP DHCP/Gateway. I must shut / no shut the ethernet0/1 interface and the it take the new address. The ISP have IP address sometimes in range 62.147.x.y , sometimes

82.252.X.Y,etc... , but the Gateway (which is too the DHCP server for this subnet) is always 62.147.X.254 or 82.252.X.254 or etc .....

What's wrong in my configuration below ? I paste examples (after config file) of :

- show dhcp lease

- dhcp debug details

Thanks a lot for your help !!

Here is the configuration

***** toto.free.fr#show run Building configuration...

Current configuration : 3494 bytes ! ! Last configuration change at 18:26:10 PCTime Sun Apr 17 2005 ! NVRAM config last updated at 18:29:19 PCTime Sun Apr 17 2005 ! version 12.3 no service pad service timestamps debug uptime service timestamps log uptime service password-encryption ! hostname toto.free.fr ! boot-start-marker boot-end-marker ! enable password 7 xxxxxxx ! clock timezone PCTime 1 clock summer-time PCTime date Mar 30 2003 2:00 Oct 26 2003 3:00 no aaa new-model ip dhcp-client network-discovery informs 2 discovers 2 period 15 ip subnet-zero no ip source-route ip cef ! ! no ip domain lookup ip dhcp excluded-address 192.168.0.1 192.168.0.200 ip dhcp excluded-address 192.168.0.210 192.168.0.254 ! ip dhcp pool wifi host 192.168.0.250 255.255.255.0 client-identifier 0100.4005.d042.b8 ! ip dhcp pool 1 network 192.168.0.0 255.255.255.0 default-router 192.168.0.244 dns-server 212.27.32.177 194.149.160.9 ! no ip bootp server ip audit notify log ip audit po max-events 100 no ftp-server write-enable ! ! ! ! interface Null0 no ip unreachables ! interface Ethernet0/0 description connected to EthernetLAN ip address 192.168.0.244 255.255.255.0 ip access-group 100 in no ip redirects no ip unreachables no ip proxy-arp ip nat inside half-duplex ! interface Ethernet0/1 description connected to Internet ip address dhcp ip access-group 103 in no ip proxy-arp ip nat outside half-duplex no cdp enable !

****I removed this part***** router rip version 1 passive-interface Ethernet0/1 network 192.168.0.0 no auto-summary ************************** ! ip nat inside source list 1 interface Ethernet0/1 overload ip nat inside source static udp 192.168.0.10 5555 interface Ethernet0/1 5555 ip nat inside source static tcp 192.168.0.10 5555 interface Ethernet0/1 5555 ip nat inside source static udp 192.168.0.10 6666 interface Ethernet0/1 6666 ip nat inside source static tcp 192.168.0.10 6666 interface Ethernet0/1 6666 no ip http server ip classless ! ! access-list 1 remark Regle NAT genereale access-list 1 permit 192.168.0.0 0.0.0.255 access-list 100 remark LAN In access-list 100 permit udp any any eq bootpc access-list 100 deny ip host 255.255.255.255 any access-list 100 deny ip 127.0.0.0 0.255.255.255 any access-list 100 permit ip any any access-list 103 remark ENTRANT Interface Wan access-list 103 permit udp any eq bootpc host 192.168.0.244 eq bootpc access-list 103 deny udp any any eq bootps access-list 103 deny udp any any eq snmp access-list 103 deny udp any any eq snmptrap access-list 103 permit ip any any snmp-server community public RO 1 snmp-server enable traps tty banner login ^CAuthorized access only! Disconnect IMMEDIATELY if you are not an authorized user! ****** Acces reserve - Deconnectez vous immediatement ****!^C ! line con 0 exec-timeout 0 0 password 7 xxxxxx login line aux 0 line vty 0 4 access-class 1 in password 7 xxxx login ! ntp clock-period 17208826 ntp server 195.83.132.135 ntp server 138.195.130.71 ntp server 195.83.66.36 ntp server 207.46.130.100 ! ! end *********

And for information

toto.free.fr#show dhcp server DHCP server: ANY (255.255.255.255) Leases: 423 Offers: 2 Requests: 426 Acks: 423 Naks: 0 Declines: 0 Releases: 3 Bad: 0 DNS0: 213.228.0.212, DNS1: 212.27.32.177 Subnet: 255.255.255.0

toto.free.fr#show dhcp lease Temp IP addr: 82.252.134.XXX for peer on Interface: Ethernet0/1 Temp sub net mask: 255.255.255.0 DHCP Lease server: 82.252.134.254, state: 3 Bound DHCP transaction id: 364230A Lease: 600 secs, Renewal: 60 secs, Rebind: 600 secs Temp default-gateway addr: 82.252.134.254 Next timer fires after: 00:00:32 Retry count: 0 Client-ID: cisco-0008.ZZZZ.YYYY-Et0/1 Hostname: toto.free.fr toto.free.fr#

toto.free.fr#show dhcp lease Temp IP addr: 82.252.134.xxx for peer on Interface: Ethernet0/1 Temp sub net mask: 255.255.255.0 DHCP Lease server: 82.252.134.254, state: 4 Rebinding DHCP transaction id: 3D6C09F Lease: 600 secs, Renewal: 60 secs, Rebind: 600 secs Temp default-gateway addr: 82.252.134.254 No timer running Retry count: 1 Client-ID: 0008.21ea.aa81 Hostname: toto.free.fr

Notice the No timer running that don't understand. I again do a shut/no shut on the E0/1 interface and now this is the new show dhcp lease command : toto.free.fr#show dhcp lease Temp IP addr: 62.147.217.XXX for peer on Interface: Ethernet0/1 Temp sub net mask: 255.255.255.0 DHCP Lease server: 62.147.217.254, state: 5 Renewing DHCP transaction id: 8E99607 Lease: 600 secs, Renewal: 60 secs, Rebind: 600 secs Temp default-gateway addr: 62.147.217.254 Next timer fires after: 00:07:45 Retry count: 1 Client-ID: 0008.21ea.aa81 Hostname: toto.free.fr toto.free.fr#

and now there is a Next timer fires after: 00:07:45

toto.free.fr#debug dhcp detail DHCP client activity debugging is on (detailed) toto.free.fr#

2d22h: DHCP: QScan: Bound..T1 fired..Renewing 2d22h: DHCP: SRequest attempt # 1 for entry: 2d22h: Temp IP addr: 82.252.138.229 for peer on Interface: Ethernet0/1 2d22h: Temp sub net mask: 255.255.255.0 2d22h: DHCP Lease server: 82.252.138.254, state: 5 Renewing 2d22h: DHCP transaction id: B0C85C3 2d22h: Lease: 600 secs, Renewal: 60 secs, Rebind: 600 secs 2d22h: Temp default-gateway addr: 82.252.138.254 2d22h: Next timer fires after: 00:08:59 2d22h: Retry count: 1 Client-ID: cisco-0008.21ea.aa81-Et0/1 2d22h: Hostname: toto.free.fr 2d22h: DHCP: SRequest - ciaddr: 82.252.138.229 2d22h: DHCP: SRequest placed lease len option: 600 2d22h: DHCP: SRequest: 310 bytes 2d22h: DHCP: SRequest: 310 bytes 2d22h: DHCP: Received a BOOTREP pkt 2d22h: DHCP: Scan: Message type: DHCP Ack 2d22h: DHCP: Scan: Server ID Option: 82.252.138.254 = 52FC8AFE 2d22h: DHCP: Scan: Renewal time: 60 2d22h: DHCP: Scan: Rebind time: 600 2d22h: DHCP: Scan: Lease Time: 600 2d22h: DHCP: Scan: Subnet Address Option: 255.255.255.0 2d22h: DHCP: Scan: Router Option: 82.252.138.254 2d22h: DHCP: Scan: DNS Name Server Option: 213.228.0.212, 212.27.32.177 2d22h: DHCP: rcvd pkt source: 82.252.138.254, destination: 82.252.138.229 2d22h: UDP sport: 43, dport: 44, length: 556 2d22h: DHCP op: 2, htype: 1, hlen: 6, hops: 0 2d22h: DHCP server identifier: 82.252.138.254 2d22h: xid: B0C85C3, secs: 0, flags: 0 2d22h: client: 0.0.0.0, your: 82.252.138.229 2d22h: srvr: 82.252.138.254, gw: 0.0.0.0 2d22h: options block length: 308

2d22h: DHCP Ack Message

2d22h: DHCP: Lease Seconds: 600 Renewal secs: 60 Rebind secs: 600 2d22h: DHCP: Server ID Option: 82.252.138.254 2d22h: DHCP: Applying DHCP options: 2d22h: DHCP: Releasing ipl options: 2d22h: Setting default_gateway to 82.252.138.254 2d22h: Adding DNS server address 213.228.0.212 2d22h: Adding DNS server address 212.27.32.177 2d22h: DHCP Client Pooling: ***Allocated IP address: 82.252.138.229 toto.free.fr#no debug dhcp DHCP client activity debugging is off toto.free.fr#

toto.free.fr#show arp Protocol Address Age (min) Hardware Addr Type Interface Internet 62.147.221.83 11 0007.cb09.a2b7 ARPA Ethernet0/1 Internet 192.168.0.9 9 00e0.4cbc.b3fb ARPA Ethernet0/0 Internet 62.147.221.254 30 0007.cb09.a2b7 ARPA Ethernet0/1 Internet 192.168.0.244 - 0008.21ea.aa80 ARPA Ethernet0/0 Internet 62.147.221.205 - 0008.21ea.aa81 ARPA Ethernet0/1

(notice that 0007.cb09.a2b7 is Mac address of ethernet ADSL modem and 0008.21ea.aa81 is Mac Address of the Ethernet0/1

toto.free.fr#traceroute 212.27.32.177

Type escape sequence to abort. Tracing the route to 212.27.32.177

1 192.168.254.254 36 msec 32 msec 37 msec 2 212.27.37.61 36 msec 36 msec 36 msec 3 212.27.51.81 40 msec 36 msec 36 msec 4 212.27.32.177 36 msec 36 msec 36 msec toto.free.fr#

toto.free.fr#show ip interface Ethernet0/0 is up, line protocol is up Internet address is 192.168.0.244/24 Broadcast address is 255.255.255.255 Address determined by non-volatile memory MTU is 1500 bytes Helper address is not set Directed broadcast forwarding is disabled Multicast reserved groups joined: 224.0.0.9 Outgoing access list is not set Inbound access list is 100 Proxy ARP is disabled Local Proxy ARP is disabled Security level is default Split horizon is enabled ICMP redirects are never sent ICMP unreachables are never sent ICMP mask replies are never sent IP fast switching is enabled IP fast switching on the same interface is disabled IP Flow switching is disabled IP CEF switching is enabled IP CEF Feature Fast switching turbo vector IP multicast fast switching is enabled IP multicast distributed fast switching is disabled IP route-cache flags are Fast, CEF Router Discovery is disabled IP output packet accounting is disabled IP access violation accounting is disabled TCP/IP header compression is disabled RTP/IP header compression is disabled Policy routing is disabled Network address translation is enabled, interface in domain inside WCCP Redirect outbound is disabled WCCP Redirect inbound is disabled WCCP Redirect exclude is disabled BGP Policy Mapping is disabled Ethernet0/1 is up, line protocol is up Internet address is 62.147.221.205/24 Broadcast address is 255.255.255.255 Address determined by DHCP MTU is 1500 bytes Helper address is not set Directed broadcast forwarding is disabled Outgoing access list is not set Inbound access list is 103 Proxy ARP is disabled Local Proxy ARP is disabled Security level is default Split horizon is enabled ICMP redirects are always sent ICMP unreachables are always sent ICMP mask replies are never sent IP fast switching is enabled IP fast switching on the same interface is disabled IP Flow switching is disabled IP CEF switching is enabled IP CEF Feature Fast switching turbo vector IP multicast fast switching is enabled IP multicast distributed fast switching is disabled IP route-cache flags are Fast, CEF Router Discovery is disabled IP output packet accounting is disabled IP access violation accounting is disabled TCP/IP header compression is disabled RTP/IP header compression is disabled Policy routing is disabled Network address translation is enabled, interface in domain outside WCCP Redirect outbound is disabled WCCP Redirect inbound is disabled WCCP Redirect exclude is disabled BGP Policy Mapping is disabled toto.free.fr# toto.free.fr#show interfaces Ethernet0/0 is up, line protocol is up Hardware is AmdP2, address is 0008.21ea.aa80 (bia 0008.21ea.aa80) Description: connected to EthernetLAN Internet address is 192.168.0.244/24 MTU 1500 bytes, BW 10000 Kbit, DLY 1000 usec, reliability 255/255, txload 1/255, rxload 1/255 Encapsulation ARPA, loopback not set Keepalive set (10 sec) ARP type: ARPA, ARP Timeout 04:00:00 Last input 00:00:06, output 00:00:03, output hang never Last clearing of "show interface" counters never Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops:

0 Queueing strategy: fifo Output queue: 0/40 (size/max) 5 minute input rate 0 bits/sec, 0 packets/sec 5 minute output rate 0 bits/sec, 0 packets/sec 4172347 packets input, 1220388978 bytes, 0 no buffer Received 53153 broadcasts, 0 runts, 0 giants, 0 throttles 21 input errors, 0 CRC, 0 frame, 0 overrun, 21 ignored 0 input packets with dribble condition detected 5623482 packets output, 935378313 bytes, 0 underruns 0 output errors, 34856 collisions, 3 interface resets 0 babbles, 0 late collision, 54663 deferred 0 lost carrier, 0 no carrier 0 output buffer failures, 0 output buffers swapped out Ethernet0/1 is up, line protocol is up Hardware is AmdP2, address is 0008.21ea.aa81 (bia 0008.21ea.aa81) Description: connected to Internet Internet address is 62.147.221.205/24 MTU 1500 bytes, BW 10000 Kbit, DLY 1000 usec, reliability 255/255, txload 1/255, rxload 1/255 Encapsulation ARPA, loopback not set Keepalive set (10 sec) ARP type: ARPA, ARP Timeout 04:00:00 Last input 00:00:09, output 00:00:01, output hang never Last clearing of "show interface" counters never Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0 Queueing strategy: fifo Output queue: 0/40 (size/max) 5 minute input rate 0 bits/sec, 0 packets/sec 5 minute output rate 0 bits/sec, 0 packets/sec 5642038 packets input, 941936111 bytes, 0 no buffer Received 0 broadcasts, 0 runts, 0 giants, 0 throttles 2 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored 0 input packets with dribble condition detected 4243738 packets output, 1212690519 bytes, 0 underruns 202 output errors, 38583 collisions, 9 interface resets 0 babbles, 0 late collision, 188974 deferred 202 lost carrier, 0 no carrier 0 output buffer failures, 0 output buffers swapped out toto.free.fr#

Something new to understand my problem. This morning, i don't have internet because the wan ip change. So i write with debug dhcp detail mode on toto.free.fr#conf t Enter configuration commands, one per line. End with CNTL/Z. toto.free.fr(config)#ip dhcp-client network-discovery informs 2 discovers 2 period 15

And this is what the Cisco do :

toto.free.fr(config)#

21:30:02: DHCP: DHCP client process started: 12 21:30:03: DHCP: SInform 21:30:03: B'cast on Ethernet0/0 interface from 192.168.0.244 21:30:03: B'cast on Ethernet0/1 interface from 82.252.140.191^Z toto.free.fr# 21:30:18: DHCP: SInform 21:30:18: B'cast on Ethernet0/0 interface from 192.168.0.244 21:30:18: B'cast on Ethernet0/1 interface from 82.252.140.191 21:30:19: %SYS-5-CONFIG_I: Configured from console by console 21:30:33: DHCP: SInform as discover 21:30:33: B'cast on Ethernet0/0 interface from 192.168.0.244 21:30:33: B'cast on Ethernet0/1 interface from 82.252.140.191 21:30:48: DHCP: SInform as discover 21:30:48: B'cast on Ethernet0/0 interface from 192.168.0.244 21:30:48: B'cast on Ethernet0/1 interface from 82.252.140.191 21:31:03: DHCP: Shutting down from get_netinfo() 21:31:03: DHCP: Attempting to shutdown DHCP Client

And like the others time , i shut / no shut the interface because I still don't have the connection.... :-(

toto.free.fr#conf t Enter configuration commands, one per line. End with CNTL/Z. toto.free.fr(config)#interface ethernet0/1 toto.free.fr(config-if)#shut

21:32:11: DHCP: SRelease attempt # 1 for entry: 21:32:11: Temp IP addr: 82.252.140.191 for peer on Interface: Ethernet0/1 21:32:11: Temp sub net mask: 255.255.255.0 21:32:11: DHCP Lease server: 82.252.140.254, state: 7 Releasing 21:32:11: DHCP transaction id: 2289 21:32:11: Lease: 600 secs, Renewal: 60 secs, Rebind: 600 secs 21:32:11: Temp default-gateway addr: 82.252.140.254 21:32:11: Next timer fires after: 00:00:00 21:32:11: Retry count: 1 Client-ID: cisco-0008.21ea.aa81-Et0/1 21:32:11: Hostname: toto.free.fr 21:32:11: DHCP: SRelease placed Server ID option: 82.252.140.254 21:32:11: DHCP: SRelease: 279 bytes 21:32:11: DHCP: SRelease attempt # 2 for entry: 21:32:11: Temp IP addr: 82.252.140.191 for peer on Interface: Ethernet0/1 21:32:11: Temp sub net mask: 255.255.255.0 21:32:11: DHCP Lease server: 82.252.140.254, state: 7 Releasing 21:32:11: DHCP transaction id: 2289 21:32:11: Lease: 600 secs, Renewal: 60 secs, Rebind: 600 secs 21:32:11: Temp default-gateway addr: 82.252.140.254 21:32:11: Next timer fires after: 00:00:00 21:32:11: Retry count: 2 Client-ID: cisco-0008.21ea.aa81-Et0/1 21:32:11: Hostname: toto.free.fr 21:32:11: DHCP: SRelease placed Server ID option: 82.252.140.254 21:32:11: DHCP: SRelease: 279 bytes 21:32:11: DHCP: Releasing ipl options: 21:32:11: Clearing default gateway and route to 82.252.140.254 21:32:11: Clearing DNS address 213.228.0.212 21:32:11: Clearing DNS address 212.27.32.177 21:32:12: DHCP: SRelease attempt # 3 for entry: 21:32:12: Temp IP addr: 82.252.140.191 for peer on Interface: Ethernet0/1 21:32:12: Temp sub net mask: 255.255.255.0 21:32:12: DHCP Lease server: 82.252.140.254, state: 7 Releasing 21:32:12: DHCP transaction id: 2289 21:32:12: Lease: 600 secs, Renewal: 60 secs, Rebind: 600 secs 21:32:12: Next timer fires after: toto.free.fr(config-if)# 00:00:01 21:32:12: Retry count: 3 Client-ID: cisco-0008.21ea.aa81-Et0/1 21:32:12: Hostname: toto.free.fr 21:32:12: DHCP: SRelease placed Server ID option: 82.252.140.254 21:32:12: DHCP: SRelease: 279 bytes 21:32:13: RAC: DHCP stopped on interface Ethernet0/1 21:32:15: %LINK-5-CHANGED: Interface Ethernet0/1, changed state to administratively down 21:32:16: %LINEPROTO-5-UPDOWN: Line protocol on Interface Ethernet0/1, changed state to down toto.free.fr(config-if)#no shut toto.free.fr(config-if)# 21:32:29: DHCP: DHCP client process started: 10 21:32:29: RAC: Starting DHCP discover on Ethernet0/1 21:32:29: DHCP: Try 1 to acquire address for Ethernet0/1 21:32:29: DHCP: allocate request 21:32:29: DHCP: zapping entry in DHC_PURGING state for Et0/1 21:32:29: DHCP: new entry. add to queue 21:32:29: DHCP: SDiscover attempt # 1 for entry: 21:32:29: Temp IP addr: 0.0.0.0 for peer on Interface: Ethernet0/1 21:32:29: Temp sub net mask: 0.0.0.0 21:32:29: DHCP Lease server: 0.0.0.0, state: 1 Selecting 21:32:29: DHCP transaction id: 475 21:32:29: Lease: 0 secs, Renewal: 0 secs, Rebind: 0 secs 21:32:29: Next timer fires after: 00:00:02 21:32:29: Retry count: 1 Client-ID: cisco-0008.21ea.aa81-Et0/1 21:32:29: Hostname: toto.free.fr 21:32:29: DHCP: SDiscover: sending 304 byte length DHCP packet 21:32:29: DHCP: SDiscover 304 bytes 21:32:29: B'cast on Ethernet0/1 interface from 0.0.0.0 21:32:29: DHCP: Received a BOOTREP pkt 21:32:29: DHCP: Scan: Message type: DHCP Offer 21:32:29: DHCP: Scan: Server ID Option: 82.252.145.254 = 52FC91FE 21:32:29: DHCP: Scan: Renewal time: 60 21:32:29: DHCP: Scan: Rebind time: 600 21:32:29: DHCP: Scan: Lease Time: 600 21:32:29: DHCP: Scan: Subnet Address Option: 255.255.255.0 21:32:29: DHCP: Scan: Router Option: 82.252.145.254 21:32:29: DHCP: Scan: DNS Name Server Option: 213.228.0.212, 212.27.32.177 21:32:29: DHCP: rcvd pkt source: 82.252.145.254, destination: 255.255.255.255 21:32:29: UDP sport: 43, dport: 44, length: 556 21:32:29: DHCP op: 2, htype: 1, hlen: 6, hops: 0 21:32:29: DHCP server identifier: 82.252.145.254 21:32:29: xid: 475, secs: 0, flags: 0 21:32:29: client: 0.0.0.0, your: 82.252.145.104 21:32:29: srvr: 82.252.145.254, gw: 0.0.0.0 21:32:29: options block length: 308

21:32:29: DHCP Offer Message Offered AInterface Ethernet0/1 assigned DHCP address 82.252.145.104, mask 255.255.255.0 ddress: 82.252.145.104

21:32:29: DHCP: Lease Seconds: 600 Renewal secs: 60 Rebind secs: 600 21:32:29: DHCP: Server ID Option: 82.252.145.254 21:32:29: DHCP: offer received from 82.252.145.254 21:32:29: DHCP: SRequest attempt # 1 for entry: 21:32:29: Temp IP addr: 82.252.145.104 for peer on Interface: Ethernet0/1 21:32:29: Temp sub net mask: 255.255.255.0 21:32:29: DHCP Lease server: 82.252.145.254, state: 2 Requesting 21:32:29: DHCP transaction id: 475 21:32:29: Lease: 600 secs, Renewal: 0 secs, Rebind: 0 secs 21:32:29: Next timer fires after: 00:00:01 21:32:29: Retry count: 1 Client-ID: cisco-0008.21ea.aa81-Et0/1 21:32:29: Hostname: toto.free.fr 21:32:29: DHCP: SRequest- Server ID option: 82.252.145.254 21:32:29: DHCP: SRequest- Requested IP addr option: 82.252.145.104 21:32:29: DHCP: SRequest placed lease len option: 600 21:32:29: DHCP: SRequest: 322 bytes 21:32:29: DHCP: SRequest: 322 bytes 21:32:29: B'cast on Ethernet0/1 interface from 0.0.0.0 21:32:29: DHCP: Received a BOOTREP pkt 21:32:29: DHCP: Scan: Message type: DHCP Ack 21:32:29: DHCP: Scan: Server ID Option: 82.252.145.254 = 52FC91FE 21:32:29: DHCP: Scan: Renewal time: 60 21:32:29: DHCP: Scan: Rebind time: 600 21:32:29: DHCP: Scan: Lease Time: 600 21:32:29: DHCP: Scan: Subnet Address Option: 255.255.255.0 21:32:29: DHCP: Scan: Router Option: 82.252.145.254 21:32:29: DHCP: Scan: DNS Name Server Option: 213.228.0.212, 212.27.32.177 21:32:29: DHCP: rcvd pkt source: 82.252.145.254, destination: 255.255.255.255 21:32:29: UDP sport: 43, dport: 44, length: 556 21:32:29: DHCP op: 2, htype: 1, hlen: 6, hops: 0 21:32:29: DHCP server identifier: 82.252.145.254 21:32:29: xid: 475, secs: 0, flags: 0 21:32:29: client: 0.0.0.0, your: 82.252.145.104 21:32:29: srvr: 82.252.145.254, gw: 0.0.0.0 21:32:29: options block length: 308

21:32:29: DHCP Ack Message

21:32:29: DHCP: Lease Seconds: 600 Renewal secs: 60 Rebind secs: 600 21:32:29: DHCP: Server ID Option: 82.252.145.254 21:32:31: %LINK-3-UPDOWN: Interface Ethernet0/1, changed state to up 21:32:32: %LINEPROTO-5-UPDOWN: Line protocol on Interface Ethernet0/1, changed state to up 21:32:32: DHCP Client Pooling: ***Allocated IP address: 82.252.145.104 21:32:32: Allocated IP address = 82.252.145.104 255.255.255.0 ^Z toto.free.fr# 21:32:42: %SYS-5-CONFIG_I: Configured from console by console 21:32:43: DHCP: QScan: Purging entry 21:32:43: DHCP: deleting entry 81067950 82.252.140.191 from list 21:32:43: Temp IP addr: 82.252.140.191 for peer on Interface: unknown 21:32:43: Temp sub net mask: 255.255.255.0 21:32:43: DHCP Lease server: 82.252.140.254, state: 8 Purging 21:32:43: DHCP transaction id: 2289 21:32:43: Lease: 600 secs, Renewal: 60 secs, Rebind: 600 secs 21:32:43: No timer running 21:32:43: Retry count: 0 Client-ID: 21:32:43: Hostname: toto.free.fr toto.free.fr#show ip interface brief Interface IP-Address OK? Method Status Protocol Ethernet0/0 192.168.0.244 YES NVRAM up up Ethernet0/1 82.252.145.104 YES DHCP up up toto.free.fr# 21:33:32: DHCP: QScan: Bound..T1 fired..Renewing 21:33:32: DHCP: SRequest attempt # 1 for entry: 21:33:32: Temp IP addr: 82.252.145.104 for peer on Interface: Ethernet0/1 21:33:32: Temp sub net mask: 255.255.255.0 21:33:32: DHCP Lease server: 82.252.145.254, state: 5 Renewing 21:33:32: DHCP transaction id: 475 21:33:32: Lease: 600 secs, Renewal: 60 secs, Rebind: 600 secs 21:33:32: Temp default-gateway addr: 82.252.145.254 21:33:32: Next timer fires after: 00:08:59 21:33:32: Retry count: 1 Client-ID: cisco-0008.21ea.aa81-Et0/1 21:33:32: Hostname: toto.free.fr 21:33:32: DHCP: SRequest - ciaddr: 82.252.145.104 21:33:32: DHCP: SRequest placed lease len option: 600 21:33:32: DHCP: SRequest: 310 bytes 21:33:32: DHCP: SRequest: 310 bytes 21:33:32: DHCP: Received a BOOTREP pkt 21:33:32: DHCP: Scan: Message type: DHCP Ack 21:33:32: DHCP: Scan: Server ID Option: 82.252.145.254 = 52FC91FE 21:33:32: DHCP: Scan: Renewal time: 60 21:33:32: DHCP: Scan: Rebind time: 600 21:33:32: DHCP: Scan: Lease Time: 600 21:33:32: DHCP: Scan: Subnet Address Option: 255.255.255.0 21:33:32: DHCP: Scan: Router Option: 82.252.145.254 21:33:32: DHCP: Scan: DNS Name Server Option: 213.228.0.212, 212.27.32.177 21:33:32: DHCP: rcvd pkt source: 82.252.145.254, destination: 82.252.145.104 21:33:32: UDP sport: 43, dport: 44, length: 556 21:33:32: DHCP op: 2, htype: 1, hlen: 6, hops: 0 21:33:32: DHCP server identifier: 82.252.145.254 21:33:32: xid: 475, secs: 0, flags: 0 21:33:32: client: 0.0.0.0, your: 82.252.145.104 21:33:32: srvr: 82.252.145.254, gw: 0.0.0.0 21:33:32: options block length: 308

21:33:32: DHCP Ack Message

21:33:32: DHCP: Lease Seconds: 600 Renewal secs: 60 Rebind secs: 600 21:33:32: DHCP: Server ID Option: 82.252.145.254 21:33:32: DHCP Client Pooling: ***Allocated IP address: 82.252.145.104 toto.free.fr#no debug dhcp DHCP client activity debugging is off toto.free.fr#

Notice that this test is with another version of IOS (Version

12.2(16)) because someone told me that it is possible the 12.3(5a) i used thus now is perhaps boggus

PLEASE HELP !!!! I'm going mad with this problem !!! Thanks !

If you need anything else... ask me.

Thanks very much

Reply to
sam
Loading thread data ...

"But the ISP change the Internet address every two or three days, but the Cisco doesn't detect the new IP address send by the new ISP DHCP/Gateway. I must shut / no shut the ethernet0/1 interface and the it take the new address. "

I am not an expert on DHCP, however I would be surprised if a DHCP server (your ISP) should be able to change addresses already assigned to clients. If you read the RFC and post the relevant sections here indicating that the behaviour that you are seeing is correct then I will endevour to assist further.

If this is the case then the problem is with your ISP and is not a Cisco issue.

As to workarounds, you could write a script to shut and no shut the interface that you run on a computer that is attached to the network.

Some new IOS reputedly has some "kron" like scheduling.

You could connect a clockwork timer to the ethernet cable that disconnects it and reconnects it as required.

You could get a new ISP.

Reply to
anybody43

In france, the Internet provider are almost depending of the national Telecom provider. And for technical reasons, dslams are reseted every

2 or 3 days , and that's why (i think) , for all alternative internet providers , French people haven't fixe ip address with a standart adsl subscription.

As you can see in the logs i had posted after my config, i don't have always the same ip ... Here is example of ip address i have in the past : 82.252.140.191 , 82.252.145.104 , 62.147.218.233 ,

62.147.221.11 , etc .... So , can you assist me further ?

I don't think you're right ... It works pretty well with other routers like bewan , draytek, netgear , dlink , level1 . (I had PERSONNALY tested for all of these !) And it seems that some IOS 12.3 have the bug

formatting link
But i tried with two 12.2 and it is the same... So i search in my ACL to see if there is an error ... but i don't detect it.

In this situation , it is not very possible to do it (different windows pc ) and i don't know how to do it in a script.

I don't know how to do it. Can you help me ?

I don't know how to do this ... Can you explain ?

Not possible. There is a duration of commitment of the Adsl subscription. And even, this is the only ISP in this region of france that offer free unlimited VoIP .

Reply to
sam

And as you can see , i'am not the same to report the pb :

Subject: DHCP Client problem Message-ID:

Thanks for your help Sam

Reply to
sam

It's obvious from the many, many posts you have submitted on this forum that you have not been able to solve this problem. I suggest you open a TAC case. If this is a bug than opening a TAC case is only way it is going to be resolved, if it's not a bug, the TAC will certainly be able to help you.

Reply to
thrill5

Yes , i'm very suprised that nobody can help me on that problem, and that it is only with cisco hardware that i have the problem...

In one answer of someone here , i understand that to open a TAC , you MUST have a support contract with Cisco ... no ? And i don't have it : this cisco 2611 is a second-hand equipment...

Can someone tell me if my config file seems contain error(s) ?

Reply to
sam

Is this can help my problem ? Can someone explain me ? in another post i see something like that

interface FastEthernet1/0 description Connected to LAN no ip address speed 100 full-duplex ! interface FastEthernet1/0.1 description Data VLAN encapsulation dot1Q 1 native ip address 10.0.0.254 255.255.255.0 ip nat inside no snmp trap link-status

and i don't really understand.... but if i think like configuration i had seen with ATM / dialers , i ask myself if there won't be a solution like that :

interface Ethernet0/1 description Connected to WAN no ip address speed 100 full-duplex ! interface Ethernet0/1.1 description WAN ip address negotiated (or dhcp ) ???

Can someone explain me and tell me wha t about that ? Thanks Sam

Reply to
sam

I get log when there is a renew of the ip address . Below the most interesting part :

********** toto.free.fr#show dhcp lease Temp IP addr: 62.147.213.95 for peer on Interface: Ethernet0/1 Temp sub net mask: 255.255.255.0 DHCP Lease server: 62.147.213.254, state: 5 Renewing DHCP transaction id: 5AE4 Lease: 600 secs, Renewal: 60 secs, Rebind: 600 secs Temp default-gateway addr: 62.147.213.254 Next timer fires after: 00:04:26 Retry count: 1 Client-ID: cisco-0008.21ea.aa81-Et0/1 Hostname: toto.free.fr toto.free.fr# toto.free.fr# toto.free.fr# toto.free.fr# 01:12:20: DHCP: QScan: Renewal..T2 fired..Rebinding 01:12:20: DHCP: SRequest attempt # 1 for entry: 01:12:20: Temp IP addr: 62.147.213.95 for peer on Interface: Ethernet0/1 01:12:20: Temp sub net mask: 255.255.255.0 01:12:20: DHCP Lease server: 62.147.213.254, state: 4 Rebinding 01:12:20: DHCP transaction id: 5AE4 01:12:20: Lease: 600 secs, Renewal: 60 secs, Rebind: 600 secs 01:12:20: Temp default-gateway addr: 62.147.213.254 01:12:20: No timer running 01:12:20: Retry count: 1 Client-ID: cisco-0008.21ea.aa81-Et0/1 01:12:20: Hostname: toto.free.fr 01:12:20: DHCP: SRequest - ciaddr: 62.147.213.95 01:12:20: DHCP: SRequest placed lease len option: 600 01:12:20: DHCP: SRequest: 310 bytes 01:12:20: DHCP: SRequest: 310 bytes 01:12:20: DHCP: Received a BOOTREP pkt 01:12:20: DHCP: Scan: Message type: DHCP Nak 01:12:20: DHCP: Scan: Server ID Option: 82.252.136.254 = 52FC88FE 01:12:20: DHCP: rcvd pkt source: 82.252.136.254, destination: 62.147.213.95 01:12:20: UDP sport: 43, dport: 44, length: 556 01:12:20: DHCP op: 2, htype: 1, hlen: 6, hops: 0 01:12:20: DHCP server identifier: 82.252.136.254 01:12:20: xid: 5AE4, secs: 0, flags: 0 01:12:20: client: 0.0.0.0, your: 0.0.0.0 01:12:20: srvr: 0.0.0.0, gw: 0.0.0.0 01:12:20: options block length: 308

01:12:20: DHCP Nak Message

01:12:20: DHCP: Server ID Option: 82.252.136.254 01:12:20: DHCP: rcv nak 82.252.136.254 is not our server 62.147.213.254 ******************

Notice the end : it seems that it refuse the new dhcp server How to correct this ???? Thanks Sam

Reply to
sam

I get log when there is a renew of the ip address . Below the most interesting part :

********** toto.free.fr#show dhcp lease Temp IP addr: 62.147.213.95 for peer on Interface: Ethernet0/1 Temp sub net mask: 255.255.255.0 DHCP Lease server: 62.147.213.254, state: 5 Renewing DHCP transaction id: 5AE4 Lease: 600 secs, Renewal: 60 secs, Rebind: 600 secs Temp default-gateway addr: 62.147.213.254 Next timer fires after: 00:04:26 Retry count: 1 Client-ID: cisco-0008.21ea.aa81-Et0/1 Hostname: toto.free.fr toto.free.fr# toto.free.fr# toto.free.fr# toto.free.fr# 01:12:20: DHCP: QScan: Renewal..T2 fired..Rebinding 01:12:20: DHCP: SRequest attempt # 1 for entry: 01:12:20: Temp IP addr: 62.147.213.95 for peer on Interface: Ethernet0/1 01:12:20: Temp sub net mask: 255.255.255.0 01:12:20: DHCP Lease server: 62.147.213.254, state: 4 Rebinding 01:12:20: DHCP transaction id: 5AE4 01:12:20: Lease: 600 secs, Renewal: 60 secs, Rebind: 600 secs 01:12:20: Temp default-gateway addr: 62.147.213.254 01:12:20: No timer running 01:12:20: Retry count: 1 Client-ID: cisco-0008.21ea.aa81-Et0/1 01:12:20: Hostname: toto.free.fr 01:12:20: DHCP: SRequest - ciaddr: 62.147.213.95 01:12:20: DHCP: SRequest placed lease len option: 600 01:12:20: DHCP: SRequest: 310 bytes 01:12:20: DHCP: SRequest: 310 bytes 01:12:20: DHCP: Received a BOOTREP pkt 01:12:20: DHCP: Scan: Message type: DHCP Nak 01:12:20: DHCP: Scan: Server ID Option: 82.252.136.254 = 52FC88FE 01:12:20: DHCP: rcvd pkt source: 82.252.136.254, destination: 62.147.213.95 01:12:20: UDP sport: 43, dport: 44, length: 556 01:12:20: DHCP op: 2, htype: 1, hlen: 6, hops: 0 01:12:20: DHCP server identifier: 82.252.136.254 01:12:20: xid: 5AE4, secs: 0, flags: 0 01:12:20: client: 0.0.0.0, your: 0.0.0.0 01:12:20: srvr: 0.0.0.0, gw: 0.0.0.0 01:12:20: options block length: 308

01:12:20: DHCP Nak Message

01:12:20: DHCP: Server ID Option: 82.252.136.254 01:12:20: DHCP: rcv nak 82.252.136.254 is not our server 62.147.213.254 ******************

Notice the end : it seems that it refuse the new dhcp server How to correct this ???? Thanks Sam

Reply to
sam

You can purchase a support contract for all Cisco equipment even if that equipment is purchase second-hand.

A 1-year support contract can be had for your router for $280 list. This includes hardware replacement. Sounds like a bargain!

CON-SNT-2611ADSL SMARTNET 8X5XNBD 2611XM ADSL Bundle $280

Scott

Reply to
thrill5

Thanks for the information ... Where do you find it ? I can't find out on cisco's site ? (have you a link to give ? ) Because it 's a 2611 NOT a 2611XM that i have....

Have you read the new information i posted about the DHCP Nack message in the same thread ?

01:12:20: DHCP Nak Message 01:12:20: DHCP: Server ID Option: 82.252.136.254 01:12:20: DHCP: rcv nak 82.252.136.254 is not our server 62.147.213.254

and about a possibility using ethernet0/1.1 in the same thread to ?

Thanks

Reply to
sam

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