ā08-12-2013 11:46 AM - edited ā03-04-2019 08:44 PM
im not very familiar with routers/switch .. so need basic help.
i have a cisco 1800 router that i need to connect to calbe modem that is running in bridge mode.
all i was given by isp is ip address. gateway / mask
can i connect the 1800 directly to the cable modem or do i need a home router that would give ip address to the router interface?
Solved! Go to Solution.
ā08-18-2013 01:02 AM
add this
ip dhcp exclude address 192.168.1.1 192;168.1.10
connect console to your router and then insert fa 0/1 cable in your laptop and enable
debug dhcp
debug ip dhcp server packet
show ip dhcp binding
Jawad
ā08-12-2013 11:52 AM
You can connect it directly.
If you do not have experience with cisco routers, get someone that has it, that will save you much time loss and frustration.
Otherwise for home use get a linksys router that is easy to to setup with GUI.
ā08-12-2013 06:25 PM
thanks but ,,from what i gather its a simple config.. anybody else. .can help..
dsl modem > (netgear modem doing natting/dhcp) > 1841 > WLC 2504
im just looking help configuring 1841.. thanks
ā08-12-2013 07:50 PM
Why u want to use 1841 all things are working fine.
What your plan the we can guide you better.
Jawad
ā08-12-2013 09:39 PM
well
this is a new setup along with wlc,
not for home. i can get wlc support from cisco ,but they wont support router as its not under contract
so at the moment only modem and netgear router is working.
i was told wlc needs a layer 3 device to connect to modem. (so i found a old 1841 sitting around )
thus need to configure it.
ā08-13-2013 04:17 AM
Make it simple
just give ips to router interfaces
enabling ip routing
also
give default router to netgear modem
ip route 0.0.0.0 0.0.0.0 (netgear Modem IP)
Jawad
ā08-17-2013 02:13 PM
, thanks for the help
i got the following config. am i correct in assuming, if i connect a laptop to f0/1 port with crossover, it should get an ip and show be able to get on the net without issue? (cause i am not).. what do you think. he problem is i have the wlc 2504 connected to f0/1, however when i connect ap to wlc poe port they dont get ip.. (wlc is configured with routers f0/1 address as dhcp server address.
config below
Router#show run
Building configuration...
Current configuration : 1105 bytes
!
! Last configuration change at 19:25:56 UTC Thu Aug 15 2013
version 15.1
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname Router
!
boot-start-marker
boot-end-marker
!
!
!
no aaa new-model
ip source-route
!
!
!
!
ip dhcp pool DHCP
network 192.168.1.0 255.255.255.0
default-router 192.168.1.1
dns-server 64.59.144.90 64.59.150.136
!
!
ip cef
multilink bundle-name authenticated
!
!
license udi pid CISCO1841 sn FHK11462610
!
!
!
!
!
!
interface FastEthernet0/0
ip address
ip nat outside
ip virtual-reassembly in
duplex auto
speed auto
!
interface FastEthernet0/1
ip address 192.168.1.1 255.255.255.0
ip nat inside
ip virtual-reassembly in
duplex auto
speed auto
!
ip forward-protocol nd
!
!
no ip http server
ip nat inside source list
!
access-list 100 permit ip 192.168.1.0 0.0.0.255 any
!
!
control-plane
!
!
!
line con 0
line aux 0
line vty 0 4
login
transport input all
!
scheduler allocate 20000 1000
end
Router#
ā08-17-2013 03:27 PM
sorry i didnot get your point
u mean it not working if u are connecting your pc to fa 0/1
if that the case
mentioned above u were telling u have isp modem that responsible for natting dhcp (am i rite or wrong)
hav u connected that to your router.
if you have connected to that to your router what that modem lan ip and wan ip.
second
ping
184.70.21.165
r u able to ping that......
leave wlc rite now start for scratch.
Jawad
ā08-17-2013 04:32 PM
i am getting 1841 to do natting (isp modem is working in bridged mode (dpc3825)
""
ip nat inside source list 100 interface FastEthernet0/0 overload
ip route 0.0.0.0 0.0.0.0 184.70.21.165
""
this is working fine, as i can ping 8.8.8.8 from both 1841 and wlc, however problem im having is dhcp side of the config...
none of the device are getting dhcp ip address. if i connect a laptop to f0/1 (crossover) shouldn't it get a ip from router and be able to get on the net ? as per statement below?
"
ip dhcp pool DHCP
network 192.168.1.0 255.255.255.0
default-router 192.168.1.1
dns-server 64.59.144.90 64.59.150.136
!
"
interface FastEthernet0/1
ip address 192.168.1.1 255.255.255.0
ip nat inside
ip virtual-reassembly in
duplex auto
speed auto
!
??
the issue here is the ap connected to wlc aren't getting ip from 1841, ... i dont see anything wrong with my config (pasted above)...
ā08-18-2013 12:47 AM
when u attached your pc to fa 0/1 r u getting ip address
Jawad
ā08-18-2013 12:57 AM
no.. I'm not..
ā08-18-2013 01:02 AM
add this
ip dhcp exclude address 192.168.1.1 192;168.1.10
connect console to your router and then insert fa 0/1 cable in your laptop and enable
debug dhcp
debug ip dhcp server packet
show ip dhcp binding
Jawad
ā08-18-2013 02:30 AM
Also your configuration seems ok
run this command
show ip interface bried
if u see both interface are administrative down then
go under each interface
interface fa 0/1
no shut
intface fa 0/0
no shut
***Do Rate Helpful Posts***
Jawad
ā08-20-2013 12:14 PM
it worked
think maybe i was missing below, i didnt exclude 1.1 add. could that be..
ip dhcp exclude address 192.168.1.1 192;168.1.10
i have it connected to wlc and ap via a switch. everything is working now. thanks Jawad.
Discover and save your favorite ideas. Come back to expert answers, step-by-step guides, recent topics, and more.
New here? Get started with these tips. How to use Community New member guide