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Turn my Cisco 2801 into a very expensive cable modem

Posted on 2009-03-30
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Last Modified: 2012-05-06
I have a Cisco 2601 router with a Docsis cable hwic installed(HWIC-CABLE-D-2). I am trying to connect this to my fatpipe so that the fatpipe manages the public IPs.  I enable bridging and when I plug into that port I don't get an IP address from the cable DHCP.

It should be noted if  I remove the bridge group and tell the cable interface to DHCP it gets an ip addres, so problem is not with cable connection or hwic

version 12.4
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
ip cef
!
!
!
!
multilink bundle-name authenticated
!
!
voice-card 0
!
 
archive
 log config
  hidekeys
!
!
bridge irb
!
!
!
!
interface FastEthernet0/0
 no ip address
 duplex auto
 speed auto
 bridge-group 59
!
interface FastEthernet0/1
 no ip address
 shutdown
 duplex auto
 speed auto
!
interface Cable-Modem0/3/0
 no ip address 
 no fair-queue
 bridge-group 59
!
interface BVI59
 no ip address
!
ip forward-protocol nd
!
!
no ip http server
!
!
!
!
control-plane
!
bridge 59 protocol ieee
bridge 59 route ip
!
!
!
!
!
!
!
!
gatekeeper
 shutdown
!
!
line con 0
line aux 0
line vty 0 4
 login
!
scheduler allocate 20000 1000
end

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Question by:TahoeDonner
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Expert Comment

by:Don Johnston
ID: 24023395
You need to issue the command "ip address dhcp" on the BVI 59 interface.
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Accepted Solution

by:
cstosgale earned 500 total points
ID: 24023403
you need to set your BVI interface to get an ip address from dhcp.

interface BVI59
ip address dhcp
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Author Comment

by:TahoeDonner
ID: 24023616
I issued that command but it did not give me an ip
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Expert Comment

by:Don Johnston
ID: 24024448
I just looked through your config.and something's not making any sense. Your router only has one layer 3 interface.

What is it you're trying to accomplish?

If all you want is "an expensive cable modem" then remove the "bridge irb", delete the bvi interface and you're all set.



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