The document discusses EIGRP functionality on Cisco 3850 switches with an IP Base license. It explains that EIGRP is restricted to stub connections only, meaning it can only run as a stub. This prevents routes learned by EIGRP from being advertised upstream from the 3850 switch. However, a route leak map can override this behavior and allow routes to be advertised after all.

1. EIGRP IS RESTRICTED TO STUB
CONNECTIONS ONLY ON THIS
PLATFORM
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2.  If you are running a Cisco 3850 switch with the IP Base license
and you want to run EIGRP you need to be aware of the
following behaviour.
 EIGRP is Restricted to Stub Connections only on this Platform
 This means that Cisco have decided to cut down EIGRP within the
IP Base license and limit its functionality to only run as a stub.
What does this mean?
 Take the example below where you have connected another
EIGRP device underneath your Cisco 3850 switch, you have
peered them up with EIGRP and have a subnet 192.168.10.0/24
being advertised to the 3850.

3. Cisco 3850 running IP base
EIGRP stub connected summary
Another EIGRP device
192.168.10.0/24
192.168.10.0/24 not advertised
EIGRP1

4. The EIGRP config will default to the below.
 router eigrp 1
eigrp stub connected summary
 If you try and remove the eigrp stub connected summary line the platform
will throw an error
 EIGRP is Restricted to Stub Connections only on this Platform
 So this means the 192.168.10.0/24 subnet will not be advertised upstream
from the 3850

5. The Fix
 You can actually trick the switch into overriding this behaviour with a leak
map
 Simply apply this config to your switch and the routes will be advertised
 ip prefix-list PREFIX_MATCH_ANY seq 5 permit 0.0.0.0/0 le 32
 route-map PREFIX_MATCH_ANY permit 10
match ip address prefix-list PREFIX_MATCH_ANY
 router eigrp 1
eigrp stub connected summary static redidstributed leak-map
PREFIX_MATCH_ANY