Question

Binding 2 T1's on a Cisco 2600 Router

Asked by: dmgitna

Hey there!
     We have an office with 2 T1's but one is not being used at the moment. I'd like to bind it with the one that's currently in use. We have a Cisco 2600 router currently in that office. Now, the two T1's are from different carriers ... the one in use has a /30 IP block and the "dormant" one has a /29. Does any of this pose a problem? Thanks.

Dan

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Asked On
2007-02-02 at 09:31:40ID22147331
Tags

cisco

,

2600

,

bind

,

t1

Topic

Network Routers

Participating Experts
2
Points
250
Comments
4

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Answers

 

by: lrmoorePosted on 2007-02-02 at 09:42:45ID: 18454331

You have some options, none of them include 'binding' the two together because they are different providers. Only if they are the same provider and they support it.
You can load-share between them, but the techniques to do so vary according to your requirements and each technique has its own risks and rewards.
Rather than go on with a bunch of options, have a read through these, and then we can get into more specifics on what you want to accomplish:

Here's a long discussion we had recently trying to use two links to satisfaction with mixed results:
http://www.experts-exchange.com/Networking/Q_22129444.html

Here's one we're still working on today
http://www.experts-exchange.com/Networking/Q_22145965.html

 

by: tlamoniaPosted on 2007-09-29 at 19:37:57ID: 19985999

Short answer:
1) You will need portable ARIN assigned IPs to do this (www.arin.net).  If you got your IPs from your providers you will not be able to load share.
2) If you are able to obtain your own address space, then you can run BGP with each of your providers.  BGP will enable you to load share and fail-over (externally).
3) Along with BGP, you will need to run EIGRP or OSPF internally, so both of your routers can share routing tables.  This will enable you to complete your load sharing config and provide fail-over in the event one of your ISPs or routers fails.
Sorry, no easy answer.
-Todd

20120131-EE-VQP-002

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