EIGRP is not sharing routes between a layer 3 switch and router connected through a trunk

[Rowlands Price]

Dear Support

I configured vlan on a layer 3 switch (ws-c3750x-12s).many vlans are created and populate via VTP

Vlan 20 has a ip address 10.180.100.2/30

This layer 3 is connected to a layer 2 switch via a trunk link, and a router is connected on layer on a access port on vlan 20

From the layer 3 swicth i can ping the router ip 10.180.100.2/30

Eigrp is enable on layer 3 swicth and on the router too for populating routing table.

Layer 3 switch and router are in the same eigrp autonomous-system 13

My issue is that from router, i cannot see routes advertised by layer 3 switch

What can be the problem?

Attached is the diagram and a piece of layer 3 configuration

Need you help please

[devils_advocate]

You have Auto Summary on, you may find its summarising the routes.

Try and switch this off

#router eigrp 13
#no auto-summary

If that doesn't work, can you provide the result of a #show ip route on both the Layer 3 Switch and the Router?

Thanks

[Rowlands Price]

Dear Devils,

I've done the commands but still not working

When i did sh ip eigrp nei, i can see the router from c3750 switch, can cannot updates routes

Thanks

[Mark Malone]

do you see any prefixes in the show ip eigrp topology from either side ?

can you post the show ip eigrp neighbor from each router and as devils_advocate asked the show ip route

also while testing remove the eigrp stub and give each side a unique router id

have you tried debugging the eigrp packets( debug eigrp packets and debug ip eigrp neighbor), drop the link and bring it back up and see what the debugs show