Setting up Cisco 2901 Router with Comcast Broadband modem
I am trying to set-up a Cisco 2901 router that is connected to a Comcast High-Speed Modem. The connection is live since I connected a laptop directly to the modem and the internet works.
Below is the configuration from the router:
no service pad
service tcp-keepalives-in
service tcp-keepalives-out
service timestamps debug datetime msec localtime show-timezone
service timestamps log datetime msec localtime show-timezone
service password-encryption
service sequence-numbers
!
hostname Cisco2901
!
boot-start-marker
boot-end-marker
no aaa new-model
!
no ipv6 cef
no ip source-route
ip cef
!
no ip bootp server
multilink bundle-name authenticated
!
interface Embedded-Service-Engine0/0
no ip address
no ip redirects
no ip unreachables
no ip proxy-arp
shutdown
!
interface GigabitEthernet0/0
description $ES_WAN$
ip address 173.xx.yy.109 255.255.255.240
no ip redirects
no ip unreachables
no ip proxy-arp
duplex auto
speed auto
no mop enabled
!
interface GigabitEthernet0/1
description $ES_LAN$
ip address 192.xx.yy.1 255.255.255.0
no ip redirects
no ip unreachables
no ip proxy-arp
duplex auto
speed auto
no mop enabled
!
ip forward-protocol nd
!
ip http server
ip http authentication local
no ip http secure-server
!
ip route 0.0.0.0 0.0.0.0 173.xx.yy.110
!
logging trap debugging
!
no cdp run
!
snmp-server community public RO
!
control-plane
!
line con 0
line aux 0
line 2
no activation-character
no exec
transport preferred none
transport input all
transport output pad telnet rlogin lapb-ta mop udptn v120 ssh
stopbits 1
Is there something I am missing? It tries to connect from the laptop, but just keeps looping.
Below is the configuration from the router:
no service pad
service tcp-keepalives-in
service tcp-keepalives-out
service timestamps debug datetime msec localtime show-timezone
service timestamps log datetime msec localtime show-timezone
service password-encryption
service sequence-numbers
!
hostname Cisco2901
!
boot-start-marker
boot-end-marker
no aaa new-model
!
no ipv6 cef
no ip source-route
ip cef
!
no ip bootp server
multilink bundle-name authenticated
!
interface Embedded-Service-Engine0/0
no ip address
no ip redirects
no ip unreachables
no ip proxy-arp
shutdown
!
interface GigabitEthernet0/0
description $ES_WAN$
ip address 173.xx.yy.109 255.255.255.240
no ip redirects
no ip unreachables
no ip proxy-arp
duplex auto
speed auto
no mop enabled
!
interface GigabitEthernet0/1
description $ES_LAN$
ip address 192.xx.yy.1 255.255.255.0
no ip redirects
no ip unreachables
no ip proxy-arp
duplex auto
speed auto
no mop enabled
!
ip forward-protocol nd
!
ip http server
ip http authentication local
no ip http secure-server
!
ip route 0.0.0.0 0.0.0.0 173.xx.yy.110
!
logging trap debugging
!
no cdp run
!
snmp-server community public RO
!
control-plane
!
line con 0
line aux 0
line 2
no activation-character
no exec
transport preferred none
transport input all
transport output pad telnet rlogin lapb-ta mop udptn v120 ssh
stopbits 1
Is there something I am missing? It tries to connect from the laptop, but just keeps looping.
Last Comment
ASKER
I changed the setting from the static IP address to GigabitEthernet 0/0 in the routing and this did not solve the problem.
When pinging any address I receive host not reachable.
According to comcast the gateway should read 173.xx.yy.110 should that the IP address of the WAN port?
Thanks
When pinging any address I receive host not reachable.
According to comcast the gateway should read 173.xx.yy.110 should that the IP address of the WAN port?
Thanks
What should your WAN IP be? Did you ask?
If they say the gateway should be 110 this can mean multiple things, its either there side or as you mention your WAN port
Try it on your WAN and see if it helps...
ip address 173.xx.yy.110 255.255.255.240
You currently have it set ip address 173.xx.yy.109 255.255.255.240
If they say the gateway should be 110 this can mean multiple things, its either there side or as you mention your WAN port
Try it on your WAN and see if it helps...
ip address 173.xx.yy.110 255.255.255.240
You currently have it set ip address 173.xx.yy.109 255.255.255.240
ASKER
Here is the response from Comcast:
We don’t support devices behind our gateway due to liability issues and that there are a million different devices. If you are wanting the device set up in pass thru we you will want to put the .110 in your router and I can make the changes on the gateway. Let me know and I can change it up.
So, I am not sure how helpful Comcast is.
I tried to put the 110 in the WAN and it still does not work.
We don’t support devices behind our gateway due to liability issues and that there are a million different devices. If you are wanting the device set up in pass thru we you will want to put the .110 in your router and I can make the changes on the gateway. Let me know and I can change it up.
So, I am not sure how helpful Comcast is.
I tried to put the 110 in the WAN and it still does not work.
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you have what I presume is s public address and a private address in your config, but no NAt statement.
You need to enable NAT
You need to enable NAT
ASKER
It was the nat that needed configured. Called Cisco and they walked me through it.
Routers
A router is a networking device that forwards data packets between computer networks. Routers perform the "traffic directing" functions on the Internet. The most familiar type of routers are home and small office cable or DSL routers that simply pass data, such as web pages, email, IM, and videos between computers and the Internet. More sophisticated routers, such as enterprise routers, connect large business or ISP networks up to the powerful core routers that forward data at high speed along the optical fiber lines of the Internet backbone. Though routers are typically dedicated hardware devices, use of software-based routers has grown increasingly common.
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ip route 0.0.0.0 0.0.0.0 173.xx.yy.110
to
ip route 0.0.0.0 0.0.0.0 GigabitEthernet0/0
When logged into the router can you ping any internet address?
Ping 8.8.8.8 - what does this show?