Evan, at some point you might want to look beyond single circuits. An
alternative might be to aggregate your bandwidth by having your carrier
terminate it as ATM, and populate your routers with IMA cards to give you
bandwidth. Fractional DS3 should be a lot less expensive and gives you a lot
more room to grow. As you have now discovered, adding T-1s to solve
bandwidth problems has its limits. The fact that you have 12 point to points
between two sites tells me 1) that it's past time to look at this with fresh
eyes, 2) your company must have too much money, and 3) your telco really
loves you :->
OSPF is 4 equal cost paths. EIRP is 6, and the paths can be of unequal cost.
Where are you located? Contact me off line.
Chuck
-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] On Behalf Of Evan
You
Sent: Wednesday, July 26, 2000 6:49 AM
To: [EMAIL PROTECTED]
Subject: Routing Protocol Load-Sharing
What is the maximum number of equal-path equal-cost load sharing / balancing
will OSPF or EIGRP do?
Basically, I have 12 T1 circuits that I am thinking of load-sharing between
two Data Centers. I am either thinking of using a Larscom Orion 4000 IMUX to
bundle the T1 into two groups and out into HSSI interfaces of the 7000
routers, or just simply hook-up all 12 T1 directly to the routers and have
them load-share the links via routing protocols. But I am not certain if the
second option will work. I know that the routers will be taxed more and the
network overall will have several more routes to handle, but the advantage
is that each link is completely redundant from each other. But more than
anything, I am not sure if any routing protocols will handle 12
equal-path/equal-cost load-sharing and balancing.
Thanks,
Evan You - CCNA
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