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Configuration of Broadband coonection on router

Rohan Madaye
Level 1
Level 1

Dear Team,

 

 

I am having two ISp in my office one is Hathway leased line and another is TATA broadband.

recently  i have purchased cisco 1941 router.in which i have configured the hathway as a primary isp.after all the configuration users can get the 

internet through router . i,e from hathway.

 

now my issue is that,i am having TATA broadband connection,which is configured on Netgear ADSL router with the username and password.dont have static ip for broadband.

now i want to configure this connection on router through ethernet .

so that i ahev given the  192.168.2.2 ip to modem and 192.168.2.1 ip to router fast ethernet port.

 

also give the default route 0.0.0.0  0.0.0.0  192.168.2.2 200

 

still i amnot getting the internet through tata,if hathway goes down

7 Replies 7

Neeraj Arora
Level 3
Level 3

Hi Rohan,

This kind of setup works fine and I've seen it working. The only limitation is that you cannot have any internal machines exposed to Internet via Tata Broadband

 

Anyways coming back to your problem, just by what you described, I can only ask if NAT is enabled on this Ethernet Interface connected to the Netgear ADSL router, because this Netgear device only understands 192.168.2.0/24 subnet. So all your internal traffic needs to be NATed to 192.168.2.1 ip when trying to access internet via Tata Broadband

 

Hope it helps

 

Neeraj

Below is the  configuration of router:

 

 

interface GigabitEthernet0/0
 ip address 125.99.113.2 255.255.255.252
 ip nat outside
 ip virtual-reassembly in
 duplex auto
 speed auto
!
interface GigabitEthernet0/1
 ip address 192.168.1.254 255.255.255.0
 ip nat inside
 ip virtual-reassembly in
 duplex auto
 speed auto
!
interface FastEthernet0/0/0
 description connected to tata ISP on netgear DSL modem
 ip address 192.168.2.1 255.255.255.0
 ip nat outside
 ip virtual-reassembly in
 duplex auto
 speed auto
!
interface FastEthernet0/0/1
 no ip address
 shutdown
 duplex auto
 speed auto
!
ip forward-protocol nd
!
no ip http server
no ip http secure-server
!
ip nat inside source list 100 interface GigabitEthernet0/0 overload
ip nat inside source static 192.168.1.119 125.99.96.166
ip route 0.0.0.0 0.0.0.0 125.99.113.1
ip route 0.0.0.0 0.0.0.0 192.168.2.2 200
!
access-list 100 permit ip 192.168.1.0 0.0.0.255 any
!

 

 

my internal network is 192.168.1.0 /24 with the gateway 192.168.1.254

 

 

please assist me on the same

Make these config modifications and then test:

 

route-map isp1 permit 10
match ip address 100
match interface Gig0/0

route-map isp2 permit 10
match ip address 100
match interface FastEthernet0/0/0

no ip nat inside source list 100 interface GigabitEthernet0/0 overload

ip nat inside source route-map isp1 interface GigabitEthernet0/0 overload
ip nat inside source route-map isp2 interface FastEthernet0/0/0 overload

 

 

Dear Team,

 

 Se we are having hathway with the following wan ip and public ip pool:

Wan IP : 125.99.113.2    GW: 125.99.113.1

Public IP pool: 125.99.96.160 to 125.99.96.167

 

My TATA modem is in PPPOE always on mode.dont have static ip for tata.

 

so my question is that ,i want to set hathway line as  a primary and TATA as secondary.

 

So if  i did the above configuration which is sent by u. will it affect on existing connection.because i am on remote location .and the router is in Mumbai.

 

 

So please let me shall i do this configuration.

 

Awaiting your favorable answer

Hi Rohan,

 

SSH/Telnet into the Router on it's Hathway WAN interface and then issue these commands as there would be connectivity flap for couple of seconds.

 

If you are still worried about connectivity loss, then you can go with following options:

1. Change the sequence of NAT commands as:

route-map isp1 permit 10
match ip address 100
match interface Gig0/0

route-map isp2 permit 10
match ip address 100
match interface FastEthernet0/0/0

ip nat inside source route-map isp1 interface GigabitEthernet0/0 overload
ip nat inside source route-map isp2 interface FastEthernet0/0/0 overload

no ip nat inside source list 100 interface GigabitEthernet0/0 overload

 

2. Issue command "reload in 5" before implementing the above commands, so that if you are locked out, then router would restart in 5 min. with the old config and you'll be able to login into it again

3. Have someone onsite where the router is installed, so that he can console into the router if things don't go as expected

 

Dear Team,

 

         Thanks for your efforts.

 

could you please tel me.i i configure  isp modem in bridge mode.and connect one patch chord cable to router fa 0/0/0 and other end connected to modem.

           So is it possible to configure ppoe connection on router and if yes please let me the the syntax how to configure the ppoe on router 1941.

 

Awaiting your reply........

Dear Team,

 

Still i am waiting for you reply.............

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