Solved

bonding / load balancing 3 T1 Lines

Posted on 2006-06-14
26
681 Views
Last Modified: 2008-03-06
Hello.  I have a client wanting to establish a 4.5 megabit connection into our facility via the local exchange carrier which is alltel.

I was wondering if a 2600 series router would be able to handle 3 T1's bonded or load balanced.
If not, what cisco router would be suggested for this?
also, is it difficult to bond or load balance the 3 T1's to achieve this bandwidth?

Thank You!
0
Comment
Question by:linuxrox
  • 13
  • 13
26 Comments
 
LVL 12

Expert Comment

by:Scotty_cisco
Comment Utility
Yes 2 2600's will do this nicely I do it between office now and it is very easy to setup its becoming more and more common
0
 

Author Comment

by:linuxrox
Comment Utility
Ok, Scotty would you be able to share a config or just the serial interface configs that would show me what i would need?  i suppose the 2600 series has room in back for 3 csu's?
Thanks very much Scotty!
0
 
LVL 12

Accepted Solution

by:
Scotty_cisco earned 500 total points
Comment Utility
I can post a partial config of the router and information that should help you get started...

!        
interface Loopback1
 ip address 10.X.X.X 255.255.255.252

interface Serial0/0
 no ip address
 no ip redirects
 no ip unreachables
 no ip proxy-arp
 ip load-sharing per-packet
 encapsulation ppp
 ppp multilink
!        
i        
interface Serial0/1
 no ip address
 no ip redirects
 no ip unreachables
 no ip proxy-arp
 ip load-sharing per-packet
 encapsulation ppp
 ppp multilink
!        
interface Serial1/0
 no ip address
 no ip redirects
 no ip unreachables
 no ip proxy-arp
 ip load-sharing per-packet
 encapsulation ppp
 serial restart-delay 0
 ppp multilink
!        
interface Virtual-Template1
 ip unnumbered Loopback1
 no ip redirects
 ip load-sharing per-packet
 ip tcp header-compression iphc-format
 ppp multilink
 ip rtp header-compression iphc-format

You can also ignore the compression commands if you have enough bandwidth.

0
 
LVL 12

Expert Comment

by:Scotty_cisco
Comment Utility
I used 3 wic-1dsu-1T and a nm-2w to get 3

Thanks
Scott
0
 

Author Comment

by:linuxrox
Comment Utility
ahh ok.  i'll look into this.  I'm not sure what virtual-template1 is.
not sure what an nm-2w is either.  i'll have to check that out at google or something.
are the wic-1dsu-1T and nm-2w 's two different physical modules and you have three of the wic-1dsu-1T 's and one of the nm-2w 's ?
is that correct?
thanks!
0
 
LVL 12

Expert Comment

by:Scotty_cisco
Comment Utility
the wic is the same thing just got the model number wrong sorry ... also the NM-2W is a WIC carrier that goes into the NM-slot to hold 2 more WIC's.

The virtual template is what acctually becomes the one interface that is capable of 4.5 meg it ties the 3 serials together and the templet gets the IP address to bond to the other side.

Thanks
0
 

Author Comment

by:linuxrox
Comment Utility
Ahh yes i think i understand you now.  you have 3 normal T1 wic's but you have one in the general location on back of the router yet you purchased a seperate module that will hold 2 of those same wic types in the module, thus giving you three T1 wics correct?

I understand the templates and loopback now..i wasn't looking at it close enough!
OH almost forgot!  the router on the other end..is it setup the same way basically only with a different ip address for the Loopback1 interface?

thanks again!!!
0
 
LVL 12

Expert Comment

by:Scotty_cisco
Comment Utility
Yup you pretty much nailed it.... I would max memory on them and watch CPU utilization when you start filling the full pipe I have noticed mine running a bit high once in a while but nothing that has caused problems could also have to do with a heavy dose of QoS going on as well...

Thanks
Scott
0
 

Author Comment

by:linuxrox
Comment Utility
Cool beans!!  I think just one more thing then i'll shuddup! haha.
Will a 2620 work ok?  i didn't know which model in the 2600 series you had.  And what OS is suggested?

here is my current 2620 setup with 12.3(16a) 64 megs RAM and 32 megs flash ram:

Cisco Internetwork Operating System Software
IOS (tm) C2600 Software (C2600-IS-M), Version 12.3(16a), RELEASE SOFTWARE (fc2)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2005 by cisco Systems, Inc.
Compiled Wed 09-Nov-05 19:23 by evmiller
Image text-base: 0x80008098, data-base: 0x81A3E850

ROM: System Bootstrap, Version 12.2(10r)1, RELEASE SOFTWARE (fc1)
ROM: C2600 Software (C2600-IS-M), Version 12.3(16a), RELEASE SOFTWARE (fc2)

Cisco2620 uptime is 2 days, 6 hours, 26 minutes
System returned to ROM by reload
System image file is "flash:c2600-is-mz.123-16a.bin"

cisco 2620 (MPC860) processor (revision 0x600) with 59392K/6144K bytes of memory.
Processor board ID JAD06010C28 (1745870344)
M860 processor: part number 0, mask 49
Bridging software.
X.25 software, Version 3.0.0.
1 FastEthernet/IEEE 802.3 interface(s)
1 Serial network interface(s)
4 ATM network interface(s)
32K bytes of non-volatile configuration memory.
32768K bytes of processor board System flash (Read/Write)
0
 
LVL 12

Expert Comment

by:Scotty_cisco
Comment Utility
Your fine with what you got standard 12.0 and above understandard ip only IOS will do what you need.

Thanks
scott
0
 

Author Comment

by:linuxrox
Comment Utility
cool Scott!  
what tells the three serial interfaces to be bound to the interface Virtual-Template1 ?
i see that the three serial's have ppp multilink enabled and so does Virtual_Template1.
is that all that is required to link the 3 serials together in the virtual template 1?
Thanks Scott!
0
 
LVL 12

Expert Comment

by:Scotty_cisco
Comment Utility
yes pretty much it was a lot easier than I originally thought. So I would not lose sleep over it.

Thanks
scott
0
 

Author Comment

by:linuxrox
Comment Utility
cool.  well i will create 3 T1 crossover cables to simulate the phone company's equipment so when i have the two routers here i can hook the three T1 csu's to one another via that cable and test it out !!

T1 crossover cables really save a lot of guess work and trouble in my opinion.
0
Highfive Gives IT Their Time Back

Highfive is so simple that setting up every meeting room takes just minutes and every employee will be able to start or join a call from any room with ease. Never be called into a meeting just to get it started again. This is how video conferencing should work!

 

Author Comment

by:linuxrox
Comment Utility
hey, i hate to keep bugg'n you but is this anywhere in your config?

multilink Virtual-Template1


from reading at cisco:

 !--- Applies the virtual interface template to the multilink bundle.
 !--- Skip this step for ISDN or dialer interfaces.

multilink Virtual-Template1


0
 
LVL 12

Expert Comment

by:Scotty_cisco
Comment Utility
nope ... never had to use it the PPP multilink in the virtual template just keeps bundling T1's as long as it has bandwidth.... so maybe I screwed up but mine all seem to work great!!!
0
 

Author Comment

by:linuxrox
Comment Utility
ahh coolness!  that's the only difference i could see from what cisco showed in there example.
on your connections did you start out with one and move to two then three or did you start with 3 from the beginning?
i'm probably a month or so away from doing it but i always like to have things figured out kind of early! lol
0
 
LVL 12

Expert Comment

by:Scotty_cisco
Comment Utility
we had 2 and filled them and added a third when I got here so kind of inherited the configuration but also the better way to do it have set it up with an ISP not using a virtual template and just does not work as nice.

Thanks
Scott
0
 

Author Comment

by:linuxrox
Comment Utility
wonderful!!  
well, it's a really simple setup using the virtual template..VERY simple.  wish it worked for ATM interfaces :) I have two of those bonded but it's more complex.  Time to go find a good deal on a 2620 or something!

FUN!
0
 
LVL 12

Expert Comment

by:Scotty_cisco
Comment Utility
got the hook up on equipment like that too.... got a guy that deals in older equipment and is a good guy
0
 

Author Comment

by:linuxrox
Comment Utility
ahh dang!  that rocks dude!  know what a 2620 goes for from him?
what state you in?  i'm in Ky.
0
 
LVL 12

Expert Comment

by:Scotty_cisco
Comment Utility
he is actually in NH so back east I am in Utah... let me see if I can get you his contact info
0
 
LVL 12

Expert Comment

by:Scotty_cisco
Comment Utility
his email is jamie@scaledatacom.com he is a good guy shoot him an email tell him Scott from Identrust sent you he will hook you up.... may pay more than Ebay but it will work and he can get it to you fairly quickly.

Thanks
scott
0
 

Author Comment

by:linuxrox
Comment Utility
10-4!  you can send it to me at  xf at westky.com
if you want!
0
 

Author Comment

by:linuxrox
Comment Utility
ahh cool beans man!  that rocks!  you can get me also at that email above.  mostly what i do involves writing php database types of solutions for people but every now and again i have to switch to hardware/networking mode to solve problems lol.
I appreciate all the help man!
0
 
LVL 12

Expert Comment

by:Scotty_cisco
Comment Utility
No problem .... I am pretty much a hard core network Guy worked for Cisco for 3 years and been doing this ever since.  My Email is my user name at yahoo.com.

Let me know if you need help

Thanks
Scott
0
 

Author Comment

by:linuxrox
Comment Utility
awsome!  I'll give ya a shout out sometime!
thanks for the help dude and GO MAVERICKS!!!
0

Featured Post

IT, Stop Being Called Into Every Meeting

Highfive is so simple that setting up every meeting room takes just minutes and every employee will be able to start or join a call from any room with ease. Never be called into a meeting just to get it started again. This is how video conferencing should work!

Join & Write a Comment

In the world of WAN, QoS is a pretty important topic for most, if not all, networks. Some WAN technologies have QoS mechanisms built in, but others, such as some L2 WAN's, don't have QoS control in the provider cloud.
Quality of Service (QoS) options are nearly endless when it comes to networks today. This article is merely one example of how it can be handled in a hub-n-spoke design using a 3-tier configuration.
After creating this article (http://www.experts-exchange.com/articles/23699/Setup-Mikrotik-routers-with-OSPF.html), I decided to make a video (no audio) to show you how to configure the routers and run some trace routes and pings between the 7 sites…
After creating this article (http://www.experts-exchange.com/articles/23699/Setup-Mikrotik-routers-with-OSPF.html), I decided to make a video (no audio) to show you how to configure the routers and run some trace routes and pings between the 7 sites…

762 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

8 Experts available now in Live!

Get 1:1 Help Now