EIGRP Stub Leak Map

This topic is to discuss the following lesson:

Hi.
I have a question.
When turn R2 into a stub router, neighbor router of R2 don’t send advertise routes except connected and summary?
After I turn R2 into a stub router, I looked R2 Routing table.
R2 have entry about R3 L0 and L1 route.
Is this correct?

R2#sh ip route eigrp | be Gateway
Gateway of last resort is not set

      3.0.0.0/32 is subnetted, 1 subnets
D        3.3.3.3 [90/130816] via 192.168.23.3, 00:07:35, GigabitEthernet2
      33.0.0.0/32 is subnetted, 1 subnets
D        33.33.33.33 [90/130816] via 192.168.23.3, 00:07:35, GigabitEthernet2
R2#
R2#sh run | sec router
router eigrp 1
 network 192.168.12.0
 network 192.168.23.0
 eigrp stub connected summary leak-map R3_L0_LEAK
R2#

Yoichi

Hello Yoichi

When R2 is configured as a stub router, this means that R2 only advertises connected and summary routes. This configuration does not affect the behavior of R3. So R3 still sends out its entries for L0 and L1, and R2 receives them. However, R2 will only advertise connected and summary routes to R1. This is the behavior of the stub feature for EIGRP.

I hope this has been helpful!

Laz

Hello Laz

Thank you so much!!
I could understand well.

Yoichi

1 Like