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Dual PTP T1 link with 2 cisco 1700's

I have 2 cisco 1700 router with 2 wic cards in both. I currently have 1 active PtP t1 line between my sites with another pair of 1700's which are going to be removed during the changeover.  Im fairly new to the cisco CLI.

I'd like to configure the new routers to run both PtP t1's and route between  them. The question is do I add both serial interfaces to a bridge group then assign the ip to the bridge or to 1 of the interfaces? I also need to configure the clocking as its not provided on a PtP . The lnside ip's (on the the serial interfaces) will be a private sub net.

Any ideas would be appreciated. If you can provide the cli commands to facilitate the link that would be great also.
0
Bryan_Gabriel
Asked:
Bryan_Gabriel
  • 2
1 Solution
 
Istvan KalmarCommented:
clocking provided the ISP, could show us the old config?
0
 
Jody LemoineNetwork ArchitectCommented:
Personally, I would look at running the two connections independently and load-balance them using a routing protocol.  This will give you redundancy, load balancing and efficient packet processing on the router.  Try something like this:

Router 1:

card type t1
!
controller T1 0
  framing esf
  clock source internal
  linecode b8zs
  channel-group 0 timeslots 1-24
!
controller T1 1
  framing esf
  clock source internal
  linecode b8zs
  channel-group 0 timeslots 1-24
!
interface Loopback0
  ip address 10.255.255.255 255.255.255.255
!
interface Serial0/0
 ip unnumbered Loopback0
 encapsulation hdlc
!
interface Serial0/1
 ip unnumbered Loopback0
 encapsulation hdlc
!
eigrp router 1
 network 10.0.0.0
 no auto-summary

Router 2:

card type t1
!
controller T1 0
  framing esf
  clock source line
  linecode b8zs
  channel-group 0 timeslots 1-24
!
controller T1 1
  framing esf
  clock source line
  linecode b8zs
  channel-group 0 timeslots 1-24
!
interface Loopback0
  ip address 10.255.255.254 255.255.255.255
!
interface Serial0/0
 ip unnumbered Loopback0
 encapsulation hdlc
!
interface Serial0/1
 ip unnumbered Loopback0
 encapsulation hdlc
!
eigrp router 1
 network 10.0.0.0
 no auto-summary

The "clock source internal" settings on router 1 and the "clock source line" settings on router two will take care of your T1 clocking.  Router 1 will provide the clocking and router 2 will take its clocking from what route 1 provides.
0
 
Jody LemoineNetwork ArchitectCommented:
If these are point-to-point T1s, there's not ISP involved.  If these are ISP-connected T1s, please let me know as the required configuration will be different.
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