06-09-2010 06:33 AM - edited 03-04-2019 08:44 AM
Hello Guys,
I have 2 T1 CSU-DSU WIC on one router and I need to configure both connections to the same service provider? What will the config look like on the T-1 interfaces? I want to load balance accross both T'-1's. Are the routes below correct to do this?
IP Address for T-1 A
140.8.8.18 255.255.255.0
IP Address for T-1 B
140.8.8.25 255.255.255.0
ip route 0.0.0.0 0.0.0.0 140.8.8.1
140.8.8.0 255.255.255.0 140.8.8.1
Solved! Go to Solution.
06-09-2010 09:31 AM
Hello Ike,
this depends on the exact hardware that you have
on some devices you use something like
controller t1 0/0
channel-group 0 1-24
no shut
this creates interface
serial 0/0:0
you then configure it
int ser0/0:0
enc ppp
ip address x.x.x.x 255.255.255.252
no shut
in other cases the commands for the controller are embedded in the serial interface configuration instead of being under controller object
Hope to help
Giuseppe
06-09-2010 09:45 AM
Hello Ike,
this is a good question
with
channel-group 0 1-24
we create an object ser0/0:0 that includes all 24 DS0 channels and we use them as a single serial interface without worrying anymore about single B channels
We are using the T1 for data services only in this way.
the same happens also with the alternate command syntax
Hope to help
Giuseppe
06-09-2010 07:47 AM
Hello Ike,
you will need two default route with different ip next-hops belonging to the two different serial interfaces, also you should avoid to overlap the subnets
140.8.8.16/30
140.8.8.20/30
on the router interfaces
ip route 0.0.0.0 0.0.0.0 140.8.8.17
ip route 0.0.0.0 0.0.0.0 140.8.8.21
this is to perform load balancing, on the other side the SP needs to set two specific static routes like
ip route 140.8.8.128 255.255.255.128 140.8.8.18
ip route 140.8.8.128 255.255.255.128 140.8.8.22
that is given a /24 address space you need to perform appropriate subnetting for getting the IP addresses for the serial links
OR the provider can give one /24 for the LAN and two /30 subnets for the two point-to-point links (this is reasonable too) out of the /24 space
Hope to help
Giuseppe
06-09-2010 08:23 AM
Thanks but, What will the configuration on the T-1 Controller Interfaces look like?
06-09-2010 09:31 AM
Hello Ike,
this depends on the exact hardware that you have
on some devices you use something like
controller t1 0/0
channel-group 0 1-24
no shut
this creates interface
serial 0/0:0
you then configure it
int ser0/0:0
enc ppp
ip address x.x.x.x 255.255.255.252
no shut
in other cases the commands for the controller are embedded in the serial interface configuration instead of being under controller object
Hope to help
Giuseppe
06-09-2010 09:41 AM
Will this ip address be valid for all 24 channels on the T-1? I mean what about
seria0/0:1
seria0/0:2
seria0/0:3
and the other serial0/0:3 to 23
Or that only for a voice setup like DS0-GROUP or PRI-GROUP
06-09-2010 09:45 AM
Hello Ike,
this is a good question
with
channel-group 0 1-24
we create an object ser0/0:0 that includes all 24 DS0 channels and we use them as a single serial interface without worrying anymore about single B channels
We are using the T1 for data services only in this way.
the same happens also with the alternate command syntax
Hope to help
Giuseppe
06-09-2010 10:30 AM
Thanks Giuseppe,
I think I am good to go now.
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