(In the book it’s wrote this: The summary route we will advertise to the backbone network is placed on the interface connected to the backbone, not under the routing process. This summary route tells EIGRP to find all networks in the 192.168.10.64 network with a block size of 32 and advertise them as one route out interface E0. This means, basically, that any packet with a destination IP address of 192.168.10.64 through 192.168.10.95 will be forwarded via this summary route).
If I try on Cisco Packet Tracer or in the GNS3 this examples and if I have on the Core router other 2 network card with other 2 router, in all router attached at the Core I find all the route summarized of all router. I assumed that I could find only in the Router linked at ETH0.
Another question: If I add another router in cascade on link of the network 192.168.10.96 and another in cascade with the network 192.168.10.128
(R0 eth0<---R_CORE--> 192.168.10.64 -->R1-->192.168.10.96-->R2--->192.168.10.128), too this 2 network (.96 --.128) are advertised in all router attached at core, not only at router R0 linked at eth0’s CORE.
Can somebody explain or clarify me why that route are advertised in all router and not only in the router R0 and and why are advertised also .96 and .128? Seem like summary address at protocol level.
As a rule: in distance-vector protocols such as RIP and EIGRP, the summarization is always configured on an interface. The "auto-summary" command in RIP and EIGRP merely activates or deactivates an automatic summarizing process that is nevertheless performed on a per-interface basis. Also, with distance-vector routing protocols, summarization can be configured on any router.
In link-state protocols such as OSPF and IS-IS, the summarization is always configured only on routers that interconnect different areas, and it is configured in the protocol configuration, not on an interface. In general, summarization in link-state protocols is less flexible.
We have 3 identical switches configured by someone else and would like to claim some of the Gigabit ports(G1/G2/G3/G4) for use on servers. When we try to change the wiring and configuration, we run in to connectivity issues. Attached is a des...
This is actually a pretty cool feature, i didn't even know it existed until I was looking for a solution to advertise a subnet (prefix in BGP talk), only if a certain condition existed. This is exactly what conditional advertisements does
j ai une question j ai achete un routeur cisco 887VA-k9 , je le configuré avec la configuration ci- dessous
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