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bonding / load balancing 3 T1 Lines

linuxrox
linuxrox asked
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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!
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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

Author

Commented:
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!
This one is on us!
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I used 3 wic-1dsu-1T and a nm-2w to get 3

Thanks
Scott

Author

Commented:
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!
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

Author

Commented:
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!!!
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

Author

Commented:
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)
Your fine with what you got standard 12.0 and above understandard ip only IOS will do what you need.

Thanks
scott

Author

Commented:
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!
yes pretty much it was a lot easier than I originally thought. So I would not lose sleep over it.

Thanks
scott

Author

Commented:
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.

Author

Commented:
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


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!!!

Author

Commented:
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
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

Author

Commented:
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!
got the hook up on equipment like that too.... got a guy that deals in older equipment and is a good guy

Author

Commented:
ahh dang!  that rocks dude!  know what a 2620 goes for from him?
what state you in?  i'm in Ky.
he is actually in NH so back east I am in Utah... let me see if I can get you his contact info
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

Author

Commented:
10-4!  you can send it to me at  xf at westky.com
if you want!

Author

Commented:
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!
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

Author

Commented:
awsome!  I'll give ya a shout out sometime!
thanks for the help dude and GO MAVERICKS!!!
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