- Automatically, by summarizing subprefixes to the classful network boundary when crossing classful network boundaries (autosummary)
- As specifically configured, advertising a summarized local IP address pool on the specified interface, (on a network access server) so that the address pool can be provided to dialup clients
Autosummary addressing always summarizes to the classful address boundary, while the ip summary-address command summarizes addresses on a specified interface. If autosummary addressing is enabled, autosummarization is the default behavior for interfaces on the router not associated with dial-in clients (the "backbone"), with or without the ip summary-address rip interface subcommand present.
For example, if a local IP address pool of 10.1.1.1 to 10.1.1.254 is configured on the network access server, you could configure the ip summary-address rip 10.1.1.0 255.255.255.0 command on the network access server port that provides addresses to dialup clients to cause the router to advertise 10.1.1.0/24 routes to dialup clients. Because a summary route is advertised, advertisement of the /32 host routes (installed when the dialup client connects) is suppressed so that the router does not advertise these routes to the network access server interface.
- Autosummary will override the configured summary-address feature on a given interface except when both of the following conditions are true:
- The configured interface summary-address and the IP address of the configured interface share the same major network (the classful, nonsubnetted portion of the IP address).
- Split horizon is not enabled on the interface.
From 12.0(6)T you can use the 'ip summary-address rip' on ATM interface (and if your RIP cloud is only 2 routers, use 'no ip split-horizon' whitout any problem).
We are pleased to announce availability of Beta software for 16.6.3.
16.6.3 will be the second rebuild on the 16.6 release train targeted
towards Catalyst 9500/9400/9300/3850/3650 switching platforms. We are
looking for early feedback from customers befor...
Introduction Featured Speakers Luis Espejel is the Telecommunications
Manager of IENova, an Oil & Gas company. Currently he works with Cisco
IOS® and Cisco IOS XE platforms, and NX to some extent. He has also
worked as a Senior Engineer with the Routing P...
In this session you can learn more about Layer 3 multicast and the best
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