EIGRP filter advertise

[att-sgcops]

I have 3 routers in the same LAN, say R1(10.1.1.1),R2(10.1.1.2) and R3(10.1.1.3), they are running EIGRP now, how do let r1 and r2 communication each other tp form a eigrp neighbor without send any eigrp related packet to r3?

[pkhatri]

Hi,

One thing you could do is to use the neighbor statement under the EIGRP process on R1 and R2:

R1:

router eigrp 100

neighbor 10.1.1.2

R2:

router eigrp 100

neighbor 10.1.1.1

Hope that helps - pls do rate the post if it does.

Paresh

[att-sgcops]

thanks for your reply. please look at my example:

R1(router)--------R2(Cat 3750 with lay3 enabled)----R3

r1:

router eigrp

network 12.12.12.0

r2:

int vlan 1

ip addr 12.12.12.2 255.255.255.0

router eigrp 10

network 12.12.12.0

neighbor 12.12.12.1 vlan 1 (define the r1 neighbor)

r3:

router eigrp 10

network 12.12.12.0

but from the r2, I show ip eigrp neighbor, not any neighbor can be seen. If I remove the "neighbor" command, I saw 2 neighbors.

[att-sgcops]

by the way, are there any ways to implement this except "neighbor"?

[ariela]

Hi,

"if you want the outgoing routing updates alone be suppressed but the inbound updates continue to be received (and the routers still continue to be neighbors), then use the distribute-list command"

http://www.cisco.com/en/US/tech/tk365/technologies_tech_note09186a0080093f0a.shtml

http://www.cisco.com/en/US/tech/tk365/technologies_tech_note09186a0080208748.shtml

a 'distribute-list' in on R3, with sources R1/R2 denied?

Regards

Andrea

[att-sgcops]

it is not routing update issue, I even don't want them to form eigrp neighbor even they are runnig the same eigrp and in the same AS.

[b-ulrich]

Hi, perhaps make the interface to R3 passive.

[ariela]

Yep, use passive interface on R3

HTH

Andrea