asked on

Bonding (2) T1's on single VWIC

Hello, I have a brand new CISCO 3900 router that I need to connect up (2) T1's in a single VWIC. We have a single VWIC with (2) T1 ports. Our ISP installed a new 3MB circuit, but it came with 2 individual T1's. I need to bond both T1's together in a single serial interface card, but I'm not sure of how. Shover is below:

Cisco IOS Software, C3900 Software (C3900-UNIVERSALK9-M), Version 15.0(1)M1,
RELEASE SOFTWARE (fc1)

SIM50

It would be something like this:

interface Multilink1
ip address IP_ADDRESS SUBNET_MASK
encapsulation ppp
ppp multilink
ppp multilink group 1

interface Serial0/0/0
no ip address
encapsulation ppp
ppp multilink
ppp multilink group 1

interface Serial0/0/1
no ip address
encapsulation ppp
ppp multilink
ppp multilink group 1

Nole_Fan

ASKER

It looks like that is for using 2 serial cards. Is that correct? I've actually got 1 serial card, with 2 T1 interfaces.

Nole_Fan

ASKER

1serial Card, with 2 T1's interfaces and 1 IP address.

SIM50

You can look up their locations synthax by either looking in config or doing sh service-module.

Nole_Fan

ASKER

I'm sorry, I dont know what that means

SIM50

When you type "show service-module" in enabled mode, it will list all modules installed. Below is the example from my router that has T1 modules installed.

sh serv
Interface Serial0/0/0
Module type is T1/fractional
Hardware revision is 1.0, Software revision is 001,
Image checksum is 0xA691A0, Protocol revision is 0.1
Receiver has no alarms.
Framing is ESF, Line Code is B8ZS, Current clock source is line,
Fraction has 24 timeslots (64 Kbits/sec each), Net bandwidth is 1536 Kbits/sec.
<removed statistics for brievity>

Interface Serial0/1/0
Module type is T1/fractional
Hardware revision is 1.0, Software revision is 001,
Image checksum is 0xA691A0, Protocol revision is 0.1
Receiver has no alarms.
<removed statistics for brievity>

Nole_Fan

ASKER

When I enter that command I get the error below. % unknown command % and it points to service-module. this is running v15

SIM50

Can you post your sanitized (without usernames & passwords) switch configuration?

SIM50

Sorry, meant router configuration.

Nole_Fan

ASKER

3725CLK#wr t
Building configuration...

Current configuration : 8475 bytes
!
! Last configuration change at 14:24:00 UTC Mon Nov 22 2010
!
version 15.0
no service timestamps debug uptime
no service timestamps log uptime
service password-encryption
!

!
card type t1 0 0
card type t1 0 1

!
controller T1 0/0/1
cablelength long 0db
channel-group 0 timeslots 1-24

!
!
!
!
interface GigabitEthernet0/0
description
ip address x.x.x.x x.x.x.x

!
interface Serial0/0/1:0
description MPLS to USC
bandwidth 3088
ip address x.x.x.x x.x.x.x
fair-queue

!
router eigrp 1
distribute-list 1 out eigrp 1
network x.x.x.x
network x.x.x.x
redistribute static
auto-summary
!
ip forward-protocol nd
!
no ip http server
ip http access-class 23
ip http authentication local
ip http secure-server
ip http timeout-policy idle 60 life 86400 requests 10000
!

Heres the code for the router with the static routes, eigrp, credentials, and security removed.  Were using s0/0/1 port for the 2 T1's.

Open in new window

SIM50

controller T1 0/0/0
cablelength long 0db
channel-group 0 timeslots 1-24

interface Multilink1
ip address IP_ADDRESS SUBNET_MASK
encapsulation ppp
ppp multilink
ppp multilink group 1

interface Serial0/0/0:0
no ip address
encapsulation ppp
ppp multilink
ppp multilink group 1

interface Serial0/0/1:0
no ip address
encapsulation ppp
ppp multilink
ppp multilink group 1

Nole_Fan

ASKER

Ok, that still looks like its using 2 separate serial interfaces.

The card thats installed has 2 T1 slots in a single serial card (VWIC2-2MFT-T1/E1). We installed a serial interface with 2 T1 interfaces, because the other serial interfaces are already in use.

s0/0/0 has an independent backup line installed and s0/0/1 has the VWIC2-2MFT-T1/E1 installed.

ASKER CERTIFIED SOLUTION

Les Moore

membership

This solution is only available to members.

To access this solution, you must be a member of Experts Exchange.

Start Free Trial

SOLUTION

group0

membership

This solution is only available to members.

To access this solution, you must be a member of Experts Exchange.

Start Free Trial

Qlemo

This question has been classified as abandoned and is being closed as part of the Cleanup Program. See my comment at the end of the question for more details.