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Posted by Mack on June 14, 2007, 11:46 pm
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> > I'm really new with working with Cisco Routers, but have a question I
> > hope someone will be able to help me with. I have a Cisco 1841 Router
> > with VWIC MFT-T1 that supports up to two T1 lines but I will only be
> > running one to the router. I have spent 20 something hours researching
> > and trying to figure out how to configure it. Of course I can do most
> > of it in SDM but my problem comes with configuring it for the public
> > IP addresses (There will be 5 public IP's), I have tried setting up a
> > Multilink1 but unsuccessful (can't get internet connection and tells
> > me my MultiLink is down, but I only have 1 T1 running to it, but
> > unsure if I need the Multilink because there will be only one T1
> > running to it), if anyone has any commands that I can enter to
> > configure it that would be great or lead me somewhere in the right
> > direction.
>
> You should use a multilink interface to "bond" several physical links.
> Since you are only going to use a single T1, this is not your
> solution.
>
> When you say "There will be 5 public IP's" what exactly do you mean?
> Have you been given 5 IP's to use from an ISP? If so, the ISP has
> probably assigned you a /29 address range. This would provide for 6
> usable addresses, one of which the ISP would use for their end of the
> point-to-point T1.
>
> The interface you are using will present itself as "controller x/y"
> This is your "physical" interface - where you'll need to configure
> line coding, framing and the timeslots you want to use.
>
> Here's an EXAMPLE of the controller:
> controller T1 0/1
> framing esf
> linecode b8zs
> channel-group 0 timeslots 1-24
>
> When you enter the last line of this, a Serial interface will be
> created.
>
> Here's an EXAMPLE of what the Serial interface might look like.
> interface Serial0/1:0
> ip address xxx.xxx.xxx.xxx 255.255.255.248
> encapsulation ppp
>
> If you have the everything correct, you'll get something like:
> Serial0/1:0 is up, line protocol is up
>
> The first "up" would indicate you have the controller configured
> correctly,
> The second "up" indicates you have the correct encapsulation.
>
> You'll probably need a static route to forward traffic to the
> internet.
> There's two common types of static routes - either will work for you.
> Here's the EXAMPLEs
> ip route 0.0.0.0 0.0.0.0 xxx.xxx.xxx.xxx ! -- this will be IP
> address of your ISP's router.
> - or -
> ip route 0.0.0.0 0.0.0.0 serial0/1:0
>
> post your config when you get it close - we may be able to help
> further.
> Be SURE to mask the IP addresses and any passwords.
>
> Good luck
> JC
Thanks for your help! This might be a stupid question but how do I
delete the MultiLink1? And once I about get it configured what command
do I enter to show the config to post? Thanks again!
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