I see 2 issues here:
1st, you need to configure manual summarization to solve your problem. I remember
seeing somewhere in my studies something that implies that EIGRP autosummarizes at any
bit boundary. Not true - auto-summary is only at major network boundaries, and since
both of your interfaces are in the same major network (class C 192.168.115.0) only
manual summarization will accomplish this. (reference:
http://www.cisco.com/univercd/cc/td/doc/product/software/ios112/112cg_cr/5cbook/5ciprout.htm)
2nd, since manual summarization does your job, can/should you turn off auto
summarization? You don't have to, but you can. Auto-summary won't accomplish
anything in your scenario, but there may be other interfaces that you didn't mention
that could take advantage of it. According to the same reference as above, you can
configure manual suummarization with auto-summary still on, but there are people that
turn it off & control all suummarization. You HAVE to turn off auto-summary if you
have discontiguous subnets, so you don't get an advertisement to the same major
networks from 2 different places.
>>> "Williamson, Paul" <[EMAIL PROTECTED]> 08/02 2:45 AM >>>
Hi
Not sure if i can do this (there is no problem that i am trying to solve,
just wondering if its good design principles)
Basically i have 2 routers in a core. One router could connect to networks.
192.168.115.0 /30
192.168.115.4 /30
192.168.115.8 /30
192.168.115.12 /30
The other to
192.168.115.16 /30
192.168.115.20 /30
192.168.115.24 /30
192.168.115.28 /30
Running EIGRP, should i auto-summarise or manually summarise
I believe if manually summarising is better; then for one router the summary
command would be
ip summary-address eigrp 20 192.168.115.0 255.255.240.0
What would the command be on the second core router ?
I haven't any configs to attach, its purely speculation at the moment
Thanks for your time
-Paul
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