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Post #1 : 06 wrz 2015, 18:52 
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Hi everybody!
I am trying learn for examp ccnp routing 30-101. I have confusion
Which is EIGRP advertise information routes in routing table or topology table to neighbor routers ?


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Post #2 : 06 wrz 2015, 21:42 
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Hi everybody!
I am trying learn for examp ccnp routing 30-101. I have confusion
Which is EIGRP advertise information routes in routing table or topology table to neighbor routers ?
Hi. I'm not sure that I fully understand your question but It looks like that you want to know what is the difference between routing table in EIGRP and topology table and what is advertised to neighbors.

First of all, EIGRP is using DUAL algorithm which base on different metric parameters and decide which route should be used as primary (Successor) and secondary, backup (Feasible successor). Only successor is installed in router routing table and used. Also only this route is advertised to EIGRP neighbors which hides topology information from EIGRP domain. Simply saying, only route which is select base on DUAL and installed in routing table localy from eigrp topology is advertise to neighbor.

Ofcourse it is possible to use some kind of load-sharing base on variance parameter for routes that are Feasible Sucessor but this is different story


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Post #3 : 07 wrz 2015, 17:44 
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Rejestracja: 12 kwie 2015, 02:20
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Hi everybody!
I am trying learn for examp ccnp routing 30-101. I have confusion
Which is EIGRP advertise information routes in routing table or topology table to neighbor routers ?
Hi. I'm not sure that I fully understand your question but It looks like that you want to know what is the difference between routing table in EIGRP and topology table and what is advertised to neighbors.

First of all, EIGRP is using DUAL algorithm which base on different metric parameters and decide which route should be used as primary (Successor) and secondary, backup (Feasible successor). Only successor is installed in router routing table and used. Also only this route is advertised to EIGRP neighbors which hides topology information from EIGRP domain. Simply saying, only route which is select base on DUAL and installed in routing table localy from eigrp topology is advertise to neighbor.

Ofcourse it is possible to use some kind of load-sharing base on variance parameter for routes that are Feasible Sucessor but this is different story
Thank you very much. I got it.


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