Configure an 837 2

[Adams65]

Hi,

I am new to cisco and this is my very first post.

I have inherited a 837 cisco router and would like to configure it.

At present I have four machines wired to my 2wire 2701 wireless modem/router:
a linux server (web), linux server (mail) & 2 winxp pro systems.

A further 3 laptops access the 2Wire wirelessly:
2 macs and a linux laptop.

I would like to attach the 837 but I am not sure where to put it or how to configure it.

When I say "not sure where to put it" I mean should I put it before the 2WIRE so the 837 would connect first to my ADSL (phone) line then the 2 wire into one of the fast ethernet ports on the 837, then maybe have the 3 other fast ethernet ports on the 837 filled with 3 of the systems presently wired to the 2WIRE and maybe leave the fourth wired system plugged into the 2WIRE ?

There are a number of ways it cold be organised.

Can someone help me with the config and topolgy?

Thanks

 

[VinceWhirlwind]

You first need to check that the 837 can establish a connection to your DSL provider - does it support whatever protocol you use to connect?

If it does, then you need to configure:
routing - on the 2Wire a route opinting at the 837, and on the 837 a route pointing at the 2Wire for your internal IP subnet(s).
filtering - on the 837 get some firewall rules in place.
NAT - currently being dnoe by the 2Wire - you will need to get rid of NAT on the 2Wire and do it on the 837 instead.

 

[Adams65]

Thanks for your reply. I'm amazed that a newuser has answered me and not an regular. Thankyou for trying to help out.

I have plugged in the phone line(adsl) but nothing happens. (no internet)

In the config of the router (i still have the console cable plugged in) when I do a show running-config I get:

Current configuration 860 bytes
!version 12.4
no service pad
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
!
resource policy
!
!
!
!
!
ip cef

thats all there is so I figure I need to configure from the start. I am looking around in posts for a fresh config script. Thanks for your help.

 

[Adams65]

Sorry here is my entire config at the moment:
urrent configuration : 864 bytes
!
version 12.4
no service pad
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname adamrouter
!
boot-start-marker
boot-end-marker
!
!
no aaa new-model
!
resource policy
!
!
!
!
!
ip cef
!
!
!
!
!
!
!
!
!
interface Ethernet0
no ip address
shutdown
hold-queue 100 out
!
interface Ethernet2
no ip address
shutdown
hold-queue 100 out
!
interface ATM0
no ip address
shutdown
no atm ilmi-keepalive
dsl operating-mode auto
!
interface FastEthernet1
duplex auto
speed auto
!
interface FastEthernet2
duplex auto
speed auto
!
interface FastEthernet3
duplex auto
speed auto
!
interface FastEthernet4
duplex auto
speed auto
!
!
no ip http server
no ip http secure-server
!
!
!
!
control-plane
!
!
line con 0
no modem enable
line aux 0
line vty 0 4
login
!
scheduler max-task-time 5000
end

What else can I tell you?

 

[VinceWhirlwind]

Your ATM0 port is "shutdown" - you need to do a "no shut" on it.
Try the web gui on the 837, should be pretty good.

Check the 2Wire config - it probably uses PPoE(?) or something? You need to see if your 837 can take the same configuration for the ATM0 port.

 

[Adams65]

i have a static ip from my isp and the 2wire uses PPPoA
ATM encapsulation is Bridged LLC

i have tried everything to get into a web gui for the router but I have had no joy.

i can hyperterminal to the router though.. but then I dont know how to change the config

im learning... sorry

 

[burtsbees]

Just use the Cisco without the 2wire---the Cisco is a dsl router...

/

tim@tim-laptop ~ $ sudo apt-get install windows
Reading package lists... Done
Building dependency tree
Reading state information... Done
E: Couldn't find package windows...Thank Goodness!

 

[Adams65]

I cant just use the router because their are three laptops that connect wirelessly through the same connection...using the 2wire

 

[VinceWhirlwind]

You really need to go through this step-by-step:

http://www.cisco.com/en/US/docs/routers/access/800/801/software/configuration/guide/preface.html

You need to configure your DSL interface using the config options that are currently on your working 2Wire router, to something like:
!
interface ATM0
pvc 3/100
encapsulation aal5mux ppp dialer
dialer pool-member 1
!
interface Dialer1
ip address 1.2.3.4 255.255.0.0
encapsulation ppp
dialer pool 1
dialer-group 1
ppp authentication chap callin
ppp chap hostname username1
ppp chap password password1
!
ip route 0.0.0.0 0.0.0.0 Dialer1
!

 

[VinceWhirlwind]

If I were you I'd use that configuration guide to get the SDM up-and-running - it will help you get you interfaces, firewall and NAT configured.

 

[Adams65]

Thanks..
Ive tried the guide a number of times before and during my posts here.

I know all the answers are in there but there are some things I just don't understand.

please forgive my ignorance about these things. I am trying to work it out:

here is all of the information about my 2wire that i can get out of it:
ATM Circuit Identifier: VPI: 0 VCI: 35 ATM Encapsulation: Bridged LLC ATM PVC Search: Enable DSL Connection Details DSL Line (Wire Pair): Line 1 (inner pair)Protocol: G.DMT Annex A Downstream Rate: 1536 kbps Upstream Rate: 256 kbpsChannel: FastCurrent Noise Margin: 24.0 dB (Downstream) 8.0 dB (Upstream)Current Attenuation: 55.6 dB (Downstream) 31.5 dB (Upstream)Current Output Power: 17.2 dBm (Downstream) 2.1 dBm (Upstream)DSLAM Vendor Information: Country: {0xFF} Vendor: {GSPN} Specific: {0x800}PVC Info: 8/35Internet Connection DetailsConnection Type: PPPoAUsername: xxxxx@bigpond.net.auInternet Address: xxx.xxx.xxx.xxx //my static IP Subnet Mask: 255.255.255.255 Default Gateway: 172.18.113.137 Primary Domain Name Server: 61.9.194.49 Secondary Domain Name Server: 61.9.134.49 Domain: Maximum Transmission Unit (MTU): 1500Gateway Ping: Successful DNS Communication: Successful Configuration Server Post: Successful DSL Synchronization: UP G.DMT Signal: UPPVC Connection: UP PPPoA Service: UPPPP Authentication: UP IP Connection: UPDNS Communication: UP

and here is my current running-config:

Using 1387 out of 131072 bytes
!
version 12.4
no service pad
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname adamtest
!
boot-start-marker
boot-end-marker
!
!
no aaa new-model
!
resource policy
!
!
!
!
!
ip cef
no ip domain lookup
!
!
!
!
!
!
!
!
!
interface Loopback0
no ip address
ip nat outside
ip virtual-reassembly
!
interface Ethernet0
ip address 192.168.155.2 255.255.255.0
hold-queue 100 out
!
interface Ethernet2
no ip address
shutdown
hold-queue 100 out
!
interface ATM0
ip address xxx.xxx.xxx.xxx 255.255.255.0
no atm ilmi-keepalive
dsl operating-mode auto
pvc 3/100
encapsulation aal5mux ppp dialer
dialer pool-member 1
!
!
interface FastEthernet1
duplex auto
speed auto
!
interface FastEthernet2
duplex auto
speed auto
!
interface FastEthernet3
duplex auto
speed auto
!
interface FastEthernet4
duplex auto
speed auto
!
interface Virtual-Template1
ip unnumbered Loopback0
ip nat outside
ip virtual-reassembly
!
interface Dialer1
no ip address
encapsulation ppp
dialer pool 1
dialer-group 1
ppp authentication chap callin
ppp chap hostname name@bigpond.net.au
ppp chap password 0 mypasswd
!
ip route 0.0.0.0 0.0.0.0 Dialer1
!
no ip http server
no ip http secure-server
!
!
!
!
!
control-plane
!
!
line con 0
no modem enable
line aux 0
line vty 0 4
login
!
scheduler max-task-time 5000
end

I can see that I have messed up ethernet0 and ethernet2 ip address' but whenever I put in 10.0.0.1 for ethernet2 it says" overlapping..." and doesnt enter it.

some more info that may be of relevence:

my home network setup in the 2wire states that my
DHCP range is 10.0.0.1 - 10.0.0.129

 

[Adams65]

HI,
Thanks for your help so far.
I have changed a couple of things in the config and have gained some connectivity with the Internet... and it may be the only way I can do what I want to do which was to allow all of the wireless laptops access plus all of the wired systems aswell.

I can now get internet access to all PC's and Laptops if I have the ADSL connected to the 2Wire and the 2wire plugged into one of the ethernet ports on the 837

its as if my cisco 837 is just acting like a hub

Here' my changes:
interface Ethernet0
ip address 10.0.0.111 255.255.255.0
hold-queue 100 out

interface ATM0
ip address 121.223.214.219 255.255.255.0
no atm ilmi-keepalive
dsl operating-mode auto
pvc 8/35
encapsulation aal5mux ppp dialer
dialer pool-member 1

when I take the adsl ine out of the 2wire and plug it into the 837 I get no internet anywhere.

Any suggestions?

 

[VinceWhirlwind]

Yes, I would suggest you should use the Cisco 837 on the Outside, which means you configure the ATM0 interface with your PPoA settings, then configure your 2Wire into Bridge mode.

The 2Wire can continue to be the DHCP server on the network if you like.

Go back to getting the DSL up on the router by following this step-by-step procedure for a PPoA on static IP address setup:

http://www.cisco.com/en/US/tech/tk175/tk15/technologies_configuration_example09186a008071a67e.shtml

Don't ignore the NAT config.
Worry about getting connectivity from the router to your ISP first before worrying about anything else.

The above document steps you through everything you need to do and also has excellent links to everything else you might want to do.

 

[Adams65]

Thankyou very very much
I will let you know how I go

 

[burtsbees]

Change this

access-list 1 permit 0.0.0.111 255.255.255.0

to

access-list 1 permit 10.0.0.0 0.0.0.255

by going into the cli and doing

router>en
router#conf t
router(config)#no access-list 1
router(config)#access-list 1 permit 10.0.0.0 0.0.0.255

/

tim@tim-laptop ~ $ sudo apt-get install windows
Reading package lists... Done
Building dependency tree
Reading state information... Done
E: Couldn't find package windows...Thank Goodness!

 

[Adams65]

Thankyou very much burtsbees.

I now have internet connectivity for the WinXP machine that I am configing the router from. (Eureka!)

However, now three other machines (xp & linux) give IP conflict messages and will not connect to the Internet.

This probably has something to do with the router not assigning the right internal ip address to the PC... i think.

 

[burtsbees]

Router(config)#ip dhcp excluded-address x.x.x.x

Repeat this line as many times as needed (I think---may be that it is just once, but input as many ip addresses as necessary, like "ip dhcp excluded-address 1.1.1.1 2.2.2.2 3.3.3.3, etc.). Also, you may want to add

Router(config)#ip name-server 61.9.194.49 61.9.134.49

That tells the router what to use. And can I get one of them there nifty ole stars too?

/

tim@tim-laptop ~ $ sudo apt-get install windows
Reading package lists... Done
Building dependency tree
Reading state information... Done
E: Couldn't find package windows...Thank Goodness!

 

[VinceWhirlwind]

The DHCP scope given out on your 2Wire is probably conflicting with the scope now given out on your 837. Change them so they are in the same subnet but don't overlap.

You also need to sort out the routing from your devices connected to the 2Wire by making sure it is confuigured in "bridge" mode.

 

[Adams65]

Thanks for the advice vince, at the moment I havent plugged the 2Wire back in yet I am trying first to get the other pc's that are plugged into the 837router accessing internet.
I'm sure it will come in handy soon.

Thanks burtsbees
i have rebooted two of the other pc's and checked their ipnumbers the xp machine is 10.0.0.9
and the linux mchine is 10.0.0.1

are you saying I should exclude these ip address' too?

thanks

 

[Adams65]

ok the latest is :
I have internet on now 2 of the pc's hanging off the hub

not sure what I did to get the other one working or why the third is still not getting internet.

Any suggestions?