Eigrp is restricted to stub connections
2 likes453 views
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.
Eigrp is restricted to stub connections
- 1. EIGRP IS RESTRICTED TO STUB CONNECTIONS ONLY ON THIS PLATFORM www.netprotocolxpert.in
- 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