NX-OS, EIGRP interface command

[mett_pmarser]

Hi,

a question about the
"ip router eigrp process_nber" command
under an interface.

On NX-OS, does that allow the interface
and its network to be advertise by EIGRP?

Let's say I have this interface configuration:

interface port-channel1.2
description downlink
mtu 1500
encapsulation dot1q 2
vrf member VRF-A
no ip redirect
ip address 1.1.1.1/27
ip router eigrp EIGRP_Process1
ip arp timeout 290
no shutdown

Let's say I have an EIGRP Process1 as below:

router EIGRP_Process1
vrf VRF-A
router-id 2.2.2.2
passive-interface default
address-family IPv4 unicast
autonomous-system 1

And Let's say I have adjacency on another interface
for that same vrf, VRF-A.

Will my L3 switch advertise
-1.1.1.0/27
or only the interface, ie. 1.1.1.1/32?

The "Configuring EIGRP on Cisco NX-OS device" says
"Associates this interface with the configured EIGRP process"
or
"Adds this interface to the EIGRP process".

The "Cisco Nexus 7000 Series NX-OS Unicast Routing
Command Reference" says:
"Use the ip router eigrp command to specify
the EIGRP instance for the interface".

Cisco Networks: Engineers' Handbook of Routing, Switching,
and Security with IOS, NX-OS and ASA says:
"Now you can configure an IP address on the interfaces that will
participate in EIGRP, and associate those networks with EIGRP
using the ip router eigrp command".

It is unclear to me if the subnet
will be advertised as well.

Thanks in advance,

[Georg Pauwen · Accepted solution]

Hello,

I just ran this in a test lab, only the /27 is advertised:

NX-OS

switch# sh ip eigrp topology
IP-EIGRP Topology Table for AS(1)/ID(1.1.1.1) VRF default

Codes: P - Passive, A - Active, U - Update, Q - Query, R - Reply,
r - reply Status, s - sia Status

P 1.1.1.0/27, 1 successors, FD is 2816
via Connected, Ethernet2/1

Adjacent IOS device:

Router#sh ip eigrp topology
EIGRP-IPv4 VR(EIGRP_1) Topology Table for AS(1)/ID(1.1.1.2)
Codes: P - Passive, A - Active, U - Update, Q - Query, R - Reply,
r - reply Status, s - sia Status

P 1.1.1.0/27, 1 successors, FD is 1310720
via Connected, GigabitEthernet0/0

[mett_pmarser · Accepted solution]

Hi,

Thanks a lot for your answer.

That is exactly what I wished to know.

The "ip router eigrp process_nber" command

under an interface will advertise

the interface and its network.

Thanks again and bye!