Which type of EIGRP routes are summarized by the auto-summary command?
A.
internal routes that are learned from a peer that is outside the range of local network statements
B.
external routes that are learned from a peer that is inside the range of local network statements
C.
locally created routes that are outside the range of local network statements
D.
external routes that are learned from a peer that is outside the range of local network statements
why not A.
can you please reference me material that will properly explain it why answer B is correct.
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EIGRP will not automatically summarize EIGRP external routes. It’s need to use manual summarization.
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EIGRP will not auto-summarize external routes unless there is a component of the same major network that is an internal route. http://www.rickyhare.pwp.blueyonder.co.uk/files/eigrp/eigrp5.html
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The key to this question is the word “external”.
Does it mean “redistributed to EIGRP” or “not advertised by local router”.
The answer “B” makes sense by second meaning.
Auto summary works only on a border router i.e. if your router is on the border of particular classful (major) network it will summarize “out of” this network. Otherwise received subnets of some major network are not summarized.
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I am CCNP R&S and CCDP. I am confused. I feel the question might be referring to the ‘ip summary-address eigrp AS’ command, and in that case, the answer would be A.
The ‘auto-summary’ refers to the EIRGP behavior to advertise a classful A, B, C network when 2 interfaces are assigned different class IP addresses.
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