I've got a little lab pod on gns3 very simple, all are routers
LAN---Branch1----FR1(Frame Relay Switch)---WAN1----switch---Core1
LAN ip address: 10.1.1.1
WAN ip address: 220.127.116.11
Interface pointing towards Branch1 (multipoint link) ip address: 18.104.22.168
Interface pointing towards Core: 10.0.0.10
Interface pointing towards WAN1: 10.0.0.1
All routers are running eigrp
All routers have "auto-summary" except for Branch 1 which has "no auto-summary" router command configured.
I am advertising the LAN interface (ip 10.1.1.1) with the router statement "network 10.1.1.0 0.0.0.3"
When I look at WAN1's routing table I see the following:
10.0.0.0/8 is variably subnetted, 5 subnets, 2 masks
D 10.1.1.0/24 [90/2195456] via 22.214.171.124, 00:21:09, Serial0/0.1
And when I look at Core1's routing table I see:
10.0.0.0/24 is subnetted, 4 subnets
D 10.1.1.0 [90/2221056] via 10.0.0.10, 00:29:29, FastEthernet0/0
My question is if WAN1 is configured with the "auto-summary" router command, then why is the Core1 router seeing the individual route from the Branch router, shouldn't the Core1 router route table be similar to this:
C 10.0.0.0 is directly connected, FastEthernet0/0
and nothing else about the 10.0.0.0 network?
How do the branch router routes get advertised to the core router and why aren't they being summarised by the WAN router?
Thanks in advance