Cisco 2600 Router behind ADSL router

Hi Experts,

I am trying to setup a test network before I roll it out in production network.  Its on an ADSL connection

I have a cisco 2600 Router with no ADSL wic & an Integrated netgear router.  I want to use the netgear as the gateway to gain internet access since the 2600 only has ethernet ports

Would I just connect the netgear to the fastethernet WIC and use the netgear as the default gateway or are there more things I need to consider.

Thanks
AL
Thirst4KnowledgeAsked:
Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

namolCommented:
You can pretty much do it as you listed. However, do you not have a dsl modem or is the netgear the device your isp gave you?
0
Thirst4KnowledgeAuthor Commented:
Hi Namol,

Its a dsl router, its Integrated so there is an RJ11 port for the ADSL(WAN) connection and it has ethernet ports for the LAN.  This is the what we use in the UK.

Thanks
AL
0
memo_tntCommented:
yes you can
assuimg your subnet 192.168.1.0/24
then on 2600 do the followingfastethernt 0/0
ip address 192.168.1.200 255.255.255.0
no shu
!
ip route 0.0.0.0 0.0.0.0 192.168.1.1 >>> netgear IP (gateway)
!
BR
0

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
Powerful Yet Easy-to-Use Network Monitoring

Identify excessive bandwidth utilization or unexpected application traffic with SolarWinds Bandwidth Analyzer Pack.

Thirst4KnowledgeAuthor Commented:
Hi Memo,

I had a go just before I got your response, instread of putting the internal gateway address of the netgear router I put the external Gateway address as the Ip route and I was still able to ping the external adddresses which I find strange.

[Internet]---[Netgear 192.168.0.1]---[2600 192.168.0.2]

Here is my config:

 
!  
version 12.2  
service timestamps debug uptime  
service timestamps log uptime  
no service password-encryption  
!  
hostname 2600_Router  
!  
logging queue-limit 100  
!  
memory-size iomem 15  
ip subnet-zero  
!  
!  
ip name-server xxx.xxx.xxx.xxx  (DNS server address provided by ISP)
ip name-server xxx.xxx.xxx.xxx  (DNS Server address provided by ISP)
!  
!  
interface FastEthernet0/0  
 ip address dhcp  
 ip nat outside  
 duplex auto  
 speed auto  
!  
interface Serial0/0  
 no ip address  
 shutdown  
 no fair-queue  
!  
interface FastEthernet0/1  
 no ip address  
 shutdown  
 duplex auto  
 speed auto  

ip nat inside source list 100 interface FastEthernet0/0 overload  
ip classless  
ip route 0.0.0.0 0.0.0.0 xxx.xxx.xxx.xxx(External WAN address provided by ISP)  
ip http server  
!  
access-list 100 permit ip 192.168.0.0 0.0.0.255 any  
!  
line con 0  
 exec-timeout 0 0  
line aux 0  
line vty 0 4  
 login  
!  
end  


0
memo_tntCommented:
yes because you are getting router ip and gateway through  a DHCP
interface FastEthernet0/0  
ip address dhcp
so, you can ping on both ways,, to do so ,, you need to assign a static IP as i posted before ...
try traceroute any extrnal network and check results ...
 
 
BR
0
Thirst4KnowledgeAuthor Commented:
THis is my traceroute result:

Type escape sequence to abort.
Tracing the route to www.l.google.com (209.85.227.99)

  1 192.168.0.1 0 msec 0 msec 4 msec
  2 213.130.147.48 8 msec 12 msec 8 msec
  3 bdr5.lon-th1.as8401.net (195.82.97.237) 12 msec 12 msec 12 msec
  4 gi9-7.mpd01.lon01.atlas.cogentco.com (149.6.3.5) 12 msec 16 msec 12 msec
  5 te3-1.mpd02.lon01.atlas.cogentco.com (130.117.2.26) 12 msec 12 msec
    te2-1.3493.mpd02.lon01.atlas.cogentco.com (130.117.2.18) 12 msec
  6 google.lon01.atlas.cogentco.com (130.117.14.90) 12 msec 12 msec 12 msec
  7 64.233.175.25 12 msec
    64.233.175.27 12 msec
    64.233.175.25 12 msec
  8 72.14.232.134 20 msec
    66.249.95.170 24 msec 20 msec
  9 209.85.251.231 24 msec
    209.85.252.83 20 msec 24 msec
 10 209.85.243.101 28 msec
    209.85.243.93 36 msec
    209.85.243.101 32 msec
 11  *  *  *
 12  *  *  *
 13  *  *  *


0
Thirst4KnowledgeAuthor Commented:
Also another question, is there any need for the Access-list and the IP Nat commands ?  The netgear router has NAT enabled so im not sure they are needed.

Saying that however I am going to put the 2600 router in our data center where we wont be using the netgear as Internet access is presented via Ethernet Cables (100Mbps connection)

I will obviosuly need to do access lists at that stage.
0
memo_tntCommented:

you dont need the NAT if it's enabled on the netgear,,
but i recommend to use the cisco ACL it's much dynamic and useful for me..
may be the netgear is user friendly and easier if you are not familiar with Cisco !!
I wish everthing is solved and clear for you ...

BR
0
Thirst4KnowledgeAuthor Commented:

Everything is cools so far thanks for your help. The only issue is I cant telnet to the router, it may be something to do with NAT (Being done by the netgear) I have setup telnet to be allowed on the netgear but I still cant get to the 2600 via telnet from the outside world any ideas would be appreciated ?

 Regards T4K
0
memo_tntCommented:
you are welcome any time
plz post your run config ?? remove passwords
can you telnet the router from inside ??
plus can you ping the router from outside??
 
BR
0
Thirst4KnowledgeAuthor Commented:
Hi Memo,

Sorry for the late reply,

I can ping the external address but that address belongs to the external interface of the Netgear router, which is also doing the nat.  So the f0/0 interface on the 2600 is Directly connected to the Netgear and has an RFC1918 address.

I have attached the running config and the topology if it helps.

T4K
Lab.docx
0
Thirst4KnowledgeAuthor Commented:
Just to add:

I cant telnet from the inside (PC directly connected to the netgear router on the 4 port ethernet module)
0
Thirst4KnowledgeAuthor Commented:
Update,

The reason why I could not telnet from the inside was because the ethernet cable had been unplugged :s

so I can in fact telnet from the inside
0
memo_tntCommented:
:)
:)

things happen

so, everything is settled now ??
if you need more help ,, please post
BR
0
Thirst4KnowledgeAuthor Commented:
Hi Memo,

I can now confirm that I can telnet both internaly onto the 2600 and externaly.

The problem was (with the external) that my firewall at work would not allow me to telnet to the 2600 but when I changed my default gateway to go out of another firewall I was able to telnet !!  must be a rule on the original firewall to block outgoing telnet or something ?

Thanks for all your help

T4K
0
Thirst4KnowledgeAuthor Commented:
hmm only a 6.6 ?  why is a "Good" so low ?
0
memo_tntCommented:
that's fine..

you are welcome any time

BR
0
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Broadband

From novice to tech pro — start learning today.