MY CCIE JOURNEY

#IP SUMMARY-ADDRESS EIGRP FRI JAN 2 2K9 #

TO CONFIGURE A SUMMARY AGGREGATE ADDRESS FOR A SPECIFIED
INTERFACE, USE THE "ip summary-address eigrp" command
in interface configuration mode .


"ip summary-address eigrp as-number ip-addr [admin][leakmap]"



USAGE GUIDELINES

The "ip summary-address eigrp" command is used to configure
interface level eigrp summaraisation.

EIGRP summary routes are given an administrative distance
value of 5. The administrative distance metric is used
to advertise a summary without installing it in the
routing table

By default, EIGRP summaries subnet routes to the network
level.The "no auto" command can be entered to configure
subnet level summaraisation

EIGRP SUPPORT FOR LEAKING ROUTES :

Configuring the leak-map keyword allows to advertise a
component route that would otherwise be suppressed by the
manual summary.

Any component subset of the summary can be leaked . A route
map and access list must be defined to source the leaked
route

The following is the default behaviour if an incomplete
cnfg is entered .

A) If the leak-map keyword is configured to reference a
non existant routemap, the configuration key word has no
effect. The summary address is advertised but all
component routes are suppressed

If the leak-map keyword is configured but the access-list
does not exist or the route map does not reference the
access list , the summary address and component routes
are sent .