I think I must be missing something here, or I don't understand the
concept of ABR.
If you have a 7513 in area 0 connected to a 4500 in area 1, for
instance, then the 4500 will have one interface in area0 and the rest
presumably in area 1. By definition, that makes the 4500 an ABR,
doesn't it? I don't see how you have any choice in this matter at all,
but since I've never actually configured OSPF perhaps someone will
enlighten me.
>>> "Hennen, David" <[EMAIL PROTECTED]> 2/28/01 9:32:59 AM >>>
Hi, I am preparing to bring up a new site in an ospf network. The new
site
will be a training facility connected back to the main office by a t1.
Currently we use OSPF and have everything in area 0, around 100
routers.
I want to make this new site a different area and to make the new area
a
Totally Stubby Area. We have two 7513 routers at the main office that
handle all the wan traffic, the new remote office would connect to one
of
these. The remote training office will have a 4500.
One of my coworkers suggested that the 7513 at the main office should
be the
Area Border Router, because we should keep area 0 from being spread out
over
a bunch of wan links. I had it in mind that the remote 4500 should be
the
ABR. I don't have a strong reason for thinking that way. The cpu of
the
7513 runs between 20-30 % utilization according to snmp info.
Are there any rules of thumb regarding this? I looked through the
Cisco
OSPF network design book and can see some examples that support having
the
ABR at the main office. Is that the accepted practice? Are there any
gotcha's to look out for?
Thanks if you can help
dave h
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