Does EIGRP summary routes by default?

EIGRP automatic summarization Depending on your IOS version, the EIGRP auto-summary feature might be enabled or disabled by default (it is more likely to be disabled in modern IOS versions). When auto-summary is enabled, routes are summarized to the classful boundary in the routing updates.

Can automatically summarize networks at the boundary?

In EIGRP, the auto-summary feature is enabled by default. This means that EIGRP will automatically summarize networks at their classful boundaries.

What does auto-summary command do?

To restore the default behavior of automatic summarization of subnet routes into network-level routes, use the auto-summary router configuration command. To disable this feature and transmit subprefix routing information across classful network boundaries, use the no form of this command.

How do I check my EIGRP Auto summary?

EIGRP will check if you have any subnets that fall within the range of your network command(s) and if so, it will advertise the classful A, B or C network to its neighbors. It will only summarize routes from subnets on its own interfaces, not the ones you learn from other routers.

How do you route summarize in OSPF?

To summarize routes sent to the backbone area:

1. Configure the interfaces.
2. Configure the type of OSPF area.
3. Assign the interfaces to the OSPF areas.
4. Summarize the routes that are flooded into the backbone.
5. On ABR R3, restrict the external static route from leaving area 0.0.

In what scenario will the use of EIGRP automatic summarization cause inconsistent routing in a network?

In which scenario will the use of EIGRP automatic summarization cause inconsistent routing in a network? Explanation: If there are discontiguous IPv4 networks, automatic summarization causes inconsistent routing because routes are summarized at classful boundaries.

Does OSPF use auto summary?

OSPF, unlike EIGRP, doesn’t support automatic summarization. Also, unlike EIGRP, where you can summarize routes on every router in an EIGRP network, OSFP can summarize routes only on ABRs and ASBRs.

Does OSPF support summarization?

A key feature of the OSPF protocol is the ability to summarize routes at area and autonomous system boundaries. Route summarization is important because it reduces the amount of the OSPF LSA flooding and the sizes of LSDBs and routing tables, which also reduces the memory and the CPU utilization on the routers.

Does BGP Auto summary?

BGP automatically summarizes routes to classful network boundaries when this command is enabled. Route summarization is used to reduce the amount of routing information in routing tables. Automatic summarization applies to connected, static, and redistributed routes.

How does BGP behave differently with auto summary enabled or disabled?

A. When auto-summary is enabled, it summarizes the locally originated BGP networks to their classfull boundaries. (Auto-summary is enabled by default in BGP). When auto-summary is disabled, the routes introduced locally into the BGP table are not summarized to their classfull boundaries.