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Cisco 2600 + External Adsl Modem

Hi, I can't issue configurating a cisco 2611 (2 ethernet 10Mbits) with my "special" modem from my Internet Access Provider.

My modem identify itself to my provider. It as an ethernet connection and i plug it in the Ethernet0/1 of the Cisco 2611 I connect my lan to the ethernet0/0 with the Ip

192.168.0.245/255.255.255.0

The problem is that the ethernet0/1 is in DHCP and get well an IP address and the good mask but not the router of my internet provider....

If i make (in configure terminal) ip route 0.0.0.0 0.0.0.0 x.y.z.254 (where x.y.z.254 is the provider's router when i get a x.y.z.t ip address) , i can surf for 2 minutes and then nothing works again :-(

What's wrong ? Thanks for your help .... Sam

Here is my configuration :

Cisco2611#show run Building configuration...

Current configuration : 1086 bytes ! version 12.2 no service single-slot-reload-enable service timestamps debug uptime service timestamps log uptime no service password-encryption ! hostname Cisco2611 ! logging rate-limit console 10 except errors enable secret 5 xxxxxxx ! ip subnet-zero ! ! no ip finger no ip domain-lookup ! no ip dhcp-client network-discovery ! ! ! interface Ethernet0/0 description connected to EthernetLAN ip address 192.168.0.244 255.255.255.0 ip nat inside shutdown half-duplex ! interface Ethernet0/1 description connected to Internet no ip address ip nat outside shutdown half-duplex ! router rip version 2 passive-interface Ethernet0/1 network 192.168.0.0 no auto-summary ! ip nat inside source list 1 interface Ethernet0/1 overload ip classless ip route 0.0.0.0 0.0.0.0 Ethernet0/1 no ip http server ! access-list 1 permit 192.168.0.0 0.0.0.255 snmp-server community public RO ! line con 0 exec-timeout 0 0 password xxxx login transport input none line aux 0 line vty 0 4 password xxxx login line vty 5 15 login ! no scheduler allocate end

Reply to
sam
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If you are getting an IP via ADSL modem on Ethernet 0/1 you need to configure it that way.

ip dhcp-client network discovery

interface Ethernet 0/1 ip address dhcp

Scott

Reply to
thrill5

Thanks scott for your answer but still a problem As you can see , i don't have the commande ip dhcp-client network discovery but instead "informs"

**** Cisco2611#configure terminal Enter configuration commands, one per line. End with CNTL/Z. Cisco2611(config)#ip dhcp-client network discovery Cisco2611(config)#ip dhcp-client network ? informs Configure the maximum number of DHCP Inform transmissions

Cisco2611(config)#ip dhcp-client network informs ? Maximum number of DHCP Inform transmissions

Cisco2611(config)#ip dhcp-client network informs 2 Cisco2611(config)#interface ethernet0/1 Cisco2611(config-if)#ip address dhcp Cisco2611(config-if)#^Z Cisco2611#

***

then i plug in the ethernet0/1 cable into the AdslModem :

*** 0:11:52: %LINK-3-UPDOWN: Interface Ethernet0/1, changed state to up 00:11:53: %SYS-5-CONFIG_I: Configured from console by console Cisco2611# 00:12:03: %ALIGN-3-SPURIOUS: Spurious memory access made at 0x80606A1C reading 0x30 Cisco2611#Interface Ethernet0/1 assigned DHCP address 62.147.X.Y, mask 255.255.255.0

00:13:07: %LINEPROTO-5-UPDOWN: Line protocol on Interface Ethernet0/1, changed state to up Cisco2611#show ip interface brief Interface IP-Address OK? Method Status Protocol Ethernet0/0 192.168.0.244 YES NVRAM administratively down down Ethernet0/1 62.147.X.Y YES DHCP up up Cisco2611#ping 212.27.32.177

Type escape sequence to abort. Sending 5, 100-byte ICMP Echos to 212.27.32.177, timeout is 2 seconds: ..... Success rate is 0 percent (0/5) Cisco2611#ping 212.27.32.177

Type escape sequence to abort. Sending 5, 100-byte ICMP Echos to 212.27.32.177, timeout is 2 seconds: ..... Success rate is 0 percent (0/5) Cisco2611#ping 62.147.X.254

Type escape sequence to abort. Sending 5, 100-byte ICMP Echos to 62.147.X.254, timeout is 2 seconds: ..... Success rate is 0 percent (0/5) Cisco2611#configure terminal Enter configuration commands, one per line. End with CNTL/Z. Cisco2611(config)#interface ethernet0/0 Cisco2611(config-if)#no shut Cisco2611(config-if)#^Z Cisco2611#

00:16:04: %SYS-5-CONFIG_I: Configured from console by console 00:16:04: %LINK-3-UPDOWN: Interface Ethernet0/0, changed state to up 00:16:05: %LINEPROTO-5-UPDOWN: Line protocol on Interface Ethernet0/0, changed state to up Cisco2611#ping 62.147.223.254

Type escape sequence to abort. Sending 5, 100-byte ICMP Echos to 62.147.223.254, timeout is 2 seconds: ..... Success rate is 0 percent (0/5) Cisco2611#

***

What shall i do next ? Thanks Sam

Reply to
sam

The command is ip dhcp-client network-discovery (there is a dash between network and discovery)

Show the output of

show ip route

You should see a default route that points to your ISP.

Reply to
thrill5

here is the response of the cisco Cisco2611(config)#ip dhcp-client network-discovery % Incomplete command.

Cisco2611(config)# Cisco2611(config)#ip dhcp-client network-discovery ? informs Configure the maximum number of DHCP Inform transmissions

Cisco2611(config)#ip dhcp-client network-discovery

It seems it doesn't accept the network-discovery without the informs parameter....

What can i do now ? Thanks

Reply to
sam

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