12-01-2006 11:05 AM - edited 03-05-2019 01:08 PM
Hi,
I have the 1721 router IOS-12.3
I want to use it as a home router (connected to cable modem with no dialer, I have a legal IP).
Can someone point me to a link where I can find the IOS commands to build this configuration (Ethernet0 connected to the CM; DHCP client and the FastEthernet0 is connected to a hub with DHCP server).
Thanks in advance,
Tamir
12-02-2006 03:42 PM
If you are doing NAT, then the first one is more likely to help. If you aren't, then the second one will probably help:
12-03-2006 11:43 AM
Hello Dan,
Thanks for your quick reply.
I've read the article that you?ve sent me ? THANKS!
I don?t think that this is my problem.
I need a link that will show me an example of the ?running configuration? that is similar to mine.
I?ve managed to build most of the configuration, but still it doesn?t work.
I?m getting an IP from my ISP (to the Cisco) but there is no internet connection to the LAN.
Thanks again for the help,
Best Regards,
Tamir
12-03-2006 07:04 PM
Hi,
Let me get this straight first... this is like DSL connection right?
so your topology would look like this...
pc---switch---router 1721---cable modem---internet is this your setup?
so you need to establish PPPoE on the router side... I hope I got this and just e-mail me if this is not the case...
hth
12-06-2006 12:04 PM
Hi,
First, Thanks for the help.
The connection is Cable Modem (CM).
There is no dialer needed since It?s connected to the internet automatically without any dialer (right now, there is a switch connected to the CM)
The topology is exactly as you mentioned.
I need to establish a connection with NAT and DHCP server.
Thanks in advance,
Tamir
12-07-2006 08:25 PM
Is it possible you can post a sanitized copy of your config so far?
12-07-2006 09:16 PM
I have not practically tried it but what I think is we have to configure E0 to get a DHCP address /dynamic Ip from cable modem and have 1721 run as a DHCP server for local Lan. Then we have to configure NAT on 1721 to publically route the traffic.
Conf t
interface e0
ip address dhcp -> check if that command works in your IOS.
ip nat outside
int fa 0
ip nat inside
Please check the link below and it will colve your problem:
http://www.cisco.com/en/US/tech/tk86/tk89/technologies_configuration_example09186a0080094be1.shtml
HTH, Please rate if it does.
-amit singh
12-08-2006 07:47 AM
Cisco1721#show running-config
Building configuration...
Current configuration : 1283 bytes
!
version 12.3
service timestamps debug uptime
service timestamps log uptime
service password-encryption
!
hostname Cisco1721
!
boot-start-marker
boot-end-marker
!
enable password ...
!
no aaa new-model
ip subnet-zero
!
!
ip dhcp excluded-address 192.168.0.50 192.168.0.100
!
ip dhcp pool 1
network 192.168.0.0 255.255.255.0
default-router 192.168.0.254
!
!
no ip domain lookup
ip cef
no scripting tcl init
no scripting tcl encdir
!
!
!
!
interface Ethernet0
description connected to Internet
ip address dhcp
ip nat outside
half-duplex
!
interface FastEthernet0
description connected to EthernetLAN
ip address 192.168.0.254 255.255.255.0
ip nat inside
speed auto
!
router rip
version 2
passive-interface Ethernet0
network 192.168.0.0
no auto-summary
!
ip nat translation timeout 4194
ip nat translation tcp-timeout 4194
ip nat inside source list 1 interface Ethernet0 overload
ip classless
ip route 0.0.0.0 0.0.0.0 Ethernet0
no ip http server
!
!
access-list 1 permit 192.168.0.0 0.0.0.255
snmp-server community public RO
snmp-server location Home
snmp-server enable traps tty
!
control-plane
!
!
line con 0
exec-timeout 0 0
password 7 071B325C1C514C53444359
login
line aux 0
line vty 0 4
password 7 111D0A15454A5E5A577B79
login
!
!
end
Cisco1721#
Cisco1721#show version
Cisco IOS Software, C1700 Software (C1700-Y-M), Version 12.3(2)XE, EARLY DEPLOYM
ENT RELEASE SOFTWARE (fc1)
Synched to technology version 12.3(3.5)T
TAC Support: http://www.cisco.com/tac
Copyright (c) 1986-2003 by Cisco Systems, Inc.
Compiled Wed 19-Nov-03 01:11 by ealyon
ROM: System Bootstrap, Version 12.2(7r)XM2, RELEASE SOFTWARE (fc1)
ROM:
Cisco1721 uptime is 3 minutes
System returned to ROM by power-on
System image file is "flash:c1700-y-mz.123-2.XE.bin"
Cisco 1721 (MPC860P) processor (revision 0x300) with 55208K/10328K bytes of memo
ry.
Processor board ID FOC080513KA (471973549), with hardware revision 0000
MPC860P processor: part number 5, mask 2
1 Ethernet interface
1 FastEthernet interface
32K bytes of NVRAM.
32768K bytes of processor board System flash (Read/Write)
Configuration register is 0x2102
Cisco1721#
Cisco1721#show interfaces
Ethernet0 is up, line protocol is up
Hardware is PQUICC Ethernet, address is 000d.28db.ff21 (bia 000d.28db.ff21)
Description: connected to Internet
Internet address is 84.109.17.38/22
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)
Half-duplex, 10BaseT
ARP type: ARPA, ARP Timeout 04:00:00
.
.
.
.
FastEthernet0 is up, line protocol is down
Hardware is PQUICC_FEC, address is 000f.23da.d263 (bia 000f.23da.d263)
Description: connected to EthernetLAN
Internet address is 192.168.0.254/24
MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,
reliability 198/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Unknown duplex, Unknown Speed, 100BaseTX/FX
ARP type: ARPA, ARP Timeout 04:00:00
Last input never, output 00:00:02, 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
0 packets input, 0 bytes
12-08-2006 08:05 AM
there is some connectivity problem between routers fastethernet0/0 interface and switch connectivity.thats why line protocol is down.plz. try changing the cable between the router and the switch interface and make sure that you are using a straight-through cable for the connectivity.
HTH,
-amit singh
12-10-2006 10:22 AM
Hi Amit,
Thanks for the reply.
I'm using a straight-through cable.
There was a connectivity (The link is up).
I think that there is something wrong with my configuration (IOS).
Can you advise where I can see a sample of IOS setup similar to mine?
Thanks,
Tamir
12-11-2006 09:29 PM
Hi Tamir,
First thing mention ur fa 0/0 ip add as excluded ip add in dhcp .
second check the ip access list u configured for the NAT and possible configure extended ip acl
Check Sh Ip Route
May this help u..
Thanks,
hardik
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