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Need to bond 3 T1 connections

Posted on 2008-06-20
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Last Modified: 2012-06-21
Currently we're using a Cisco 2611 with 2 T1-WIC cards. This router is running bonded T1s using HDLC and load balancing per-packet across these interfaces. We've added a 3rd T1 to the mix and since the Cisco cannot physically handle the 3rd T1 we purchased an HP Secure Router 7102dl with 2 dual port T1 cards.

What I am not able to figure out is how to setup the HP to bond the 3 T1s to get the full 4.5Mb speeds. I've asked Hp and they said this:

"If you plan to use HDLC, please note that multi-links are not supported.  The HDLC protocol will be bonded to individual T1 interfaces.  These individual interfaces are understood to provide a connection to different routers."

Then, my ISP said this:

"I believe they're just stating they do not support load-balancing with HDLC.  You need to inquire as to load balancing per-packet across these interfaces, which should be completely independent of the actual layer2 protocol being used."


Is there anyone out there who can help me get this router setup properly?
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Question by:jasonsfa98
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kanlue earned 500 total points
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Hi Jasonsfa98,

in order to bond multi-links, you can use MLPPP or MLFR.
i have 3xT1 connecting to my cisco 2821, with two VWIC-2MFT-T1, getting total 4.5Mbps from AT&T, using the MLFR. it's working perfectly.

so in your case, i would suggest you to check with your isp to switch to MLPPP or MLFR.
and HP 7102dl does support both of them very well.
and here is a sample configuration of MLPPP on hp 7102dl:
---------------
hostname "samplesetup"
no enable password
!
ip subnet-zero
ip classless
ip routing
!
event-history on
no logging forwarding
no logging email
logging email priority-level info
!
!
!
!
interface eth 0/1
ip address 10.0.0.1 255.255.255.0
no shutdown
!
interface eth 0/2
no ip address
shutdown
!
!
!
interface t1 1/1
clock source internal
tdm-group 1 timeslots 1-24 speed 64
no shutdown
!
interface t1 1/2
clock source internal
tdm-group 2 timeslots 1-24 speed 64
no shutdown
!
!
interface ppp 1
ip address 10.1.1.2 255.255.255.252
ppp multilink
no shutdown
bind 1 t1 1/1 1 ppp 1
bind 2 t1 1/2 2 ppp 1
!
!
!
!
!
ip route 0.0.0.0 0.0.0.0 10.1.1.2
!
no ip tftp server
no ip http server
no ip http secure-server
no ip snmp agent
no ip ftp agent
!
!
!
line con 0
no login
!
line telnet 0 4
login
!
end
-------------

hope it helps.

-kanlue
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by:jasonsfa98
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Well my ISP only does HDLC so I am pretty much SOL.

Your information would help someone that has an ISP willing to do PPP so here are your points!
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by:kanlue
Comment Utility
Thank you!
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