10-25-2011 05:47 PM - edited 03-04-2019 02:03 PM
Got my CCNA PT 1 test passed and I'm hyped on Cisco!!!! Got my hands on a 2801 router and a DOCSIS 2.0 HWIC. I want to make sure the Comcast yahoos that are coming later this week just have to plug in and go. Thanks for any help in advance. Here's my runnning config:
burke-rtr#sh run
Building configuration...
Current configuration : 1673 bytes
!
version 15.1
service timestamps debug datetime msec
service timestamps log datetime msec
service password-encryption
!
hostname burke-rtr
!
boot-start-marker
boot-end-marker
!
!
enable password
!
no aaa new-model
!
dot11 syslog
no ip source-route
!
!
no ip dhcp use vrf connected
ip dhcp excluded-address 192.168.1.1 192.168.1.150
!
ip dhcp pool LAN
import all
network 192.168.1.0 255.255.255.0
default-router 192.168.1.1
dns-server 192.168.1.1
!
!
!
ip cef
no ip domain lookup
ip domain name comcast.net
ip name-server 68.87.71.226
ip name-server 75.75.75.75
ip name-server 75.75.76.76
!
multilink bundle-name authenticated
!
crypto pki token default removal timeout 0
!
!
!
!
archive
log config
hidekeys
!
redundancy
!
!
!
!
!
!
!
!
!
interface FastEthernet0/0
description LAN to WAN
ip address 192.168.1.2 255.255.255.0
ip nat inside
ip virtual-reassembly in
duplex auto
speed auto
no mop enabled
!
interface FastEthernet0/1
no ip address
shutdown
duplex auto
speed auto
!
interface Cable-Modem0/2/0
description Comcast-Link
ip address dhcp
no ip redirects
no ip unreachables
ip nbar protocol-discovery
ip nat outside
ip virtual-reassembly in
no shutdown
random-detect dscp-based
no cdp enable
!
ip forward-protocol nd
!
!
no ip http server
no ip http secure-server
ip nat inside source list 1 interface Cable-Modem0/2/0 overload
ip route 0.0.0.0 0.0.0.0 Cable-Modem0/2/0
!
access-list 1 permit 192.168.1.0 0.0.0.255
!
!
!
!
!
control-plane
!
!
!
line con 0
line aux 0
line vty 0 4
password
login
transport input all
!
scheduler allocate 20000 1000
end
***I don't know Comcast's DNS servers so I just put in what was on the website. Is my DHCP ok? Also on the cable interface, does everything look good? My local routing local traffic just fine, but that's to be expected. I saw some people put there lan interface into a VLAN. Do I need to do this. Again thank you! Also, when I do a sh int the mac address that comes up is 0000.0000.0000. Should I give them the MAC address on the card? obvisouly all the 0's is not valid. I thought the cable modems should two MACs, that's why I ask. Lastly the cable modem interface goes to an administrative shutdown state after I reload the router. Is this to be exepted? Thank you!
Solved! Go to Solution.
11-03-2011 04:05 AM
David,
Congrats on your CCNA
First, the name servers in the router config don't get passed to your client. Those only allow you to be able to do name lookups from within the router like pinging www.cisco.com. The dns-server config that you have under your dhcp pool is where you would configure your dns servers that get passed back to your clients. As far as the config on the cable card, I'm not sure; I've never configured one in the past. I'd be surprised if Comcast connects your equipment though. Generally, they're going to connect their modem to make sure that they can get on the internet, they'll run their tests, and then you're on your own. Aside from that, if you just can't get your card to work, you can always connect the cable modem directly to the interface of your router and then the inside interface of the router will connect to your switch and you should be able to pass traffic fine...
HTH,
John
11-03-2011 04:05 AM
David,
Congrats on your CCNA
First, the name servers in the router config don't get passed to your client. Those only allow you to be able to do name lookups from within the router like pinging www.cisco.com. The dns-server config that you have under your dhcp pool is where you would configure your dns servers that get passed back to your clients. As far as the config on the cable card, I'm not sure; I've never configured one in the past. I'd be surprised if Comcast connects your equipment though. Generally, they're going to connect their modem to make sure that they can get on the internet, they'll run their tests, and then you're on your own. Aside from that, if you just can't get your card to work, you can always connect the cable modem directly to the interface of your router and then the inside interface of the router will connect to your switch and you should be able to pass traffic fine...
HTH,
John
11-03-2011 07:11 AM
Thanks for the input. Turns out I needed a DOCSIS 3.0 compliant device to talk with my ISP. Since Cisco does not have these cards, I had to go out and get a modem. The cable HWIC is actually a supported device, but like you said they hook up their equipment test and you're on your own. I am enjoying my 35Mb downloads though.
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