Local Route showed in routing table, however not configured

[jbaros]

Hello Team,

I have here curious case, I am seeing local routes in my routing table which is not configured on my router. See below:

Spoiler

L 10.51.38.129/32 is directly connected, GigabitEthernet0/0/2.950
L 10.51.38.150/32 is directly connected, GigabitEthernet0/0/2.950
L 10.51.38.151/32 is directly connected, GigabitEthernet0/0/2.950
L 10.51.38.152/32 is directly connected, GigabitEthernet0/0/2.950
L 10.51.38.153/32 is directly connected, GigabitEthernet0/0/2.950
L 10.51.38.154/32 is directly connected, GigabitEthernet0/0/2.950
L 10.51.38.155/32 is directly connected, GigabitEthernet0/0/2.950
L 10.51.38.157/32 is directly connected, GigabitEthernet0/0/2.950

But my interface is configured by another IP:

Spoiler

interface GigabitEthernet0/0/2.950
description --- admin to switch
encapsulation dot1Q 950
ip address 10.51.46.94 255.255.255.224 secondary
ip address 10.51.38.129 255.255.255.224
no ip redirects
no ip proxy-arp
end

Why there are such Local routes in my table? I would like to use them for switches management, however this not working until it is in routing table as L. ARP is showing that 10.51.38.150 has same MAC as router. I have tried restart interface, reconfigure, clear IP table.

How can I remove my not existing Local routes?

Thanks a  lot.

[MHM Cisco World]

there is issue with NAT I think 
can you share the config of NAT you use?

[jbaros]

Hello MHM,

I am not using NAT, but good point.

Spoiler

router1439#sh ip nat stat
Total active translations: 0 (0 static, 0 dynamic; 0 extended)
Outside interfaces:
Inside interfaces:
Hits: 1298166 Misses: 836454
Expired translations: 836312
Dynamic mappings:
nat-limit statistics:
max entry: max allowed 0, used 0, missed 0
In-to-out drops: 0 Out-to-in drops: 0
Pool stats drop: 0 Mapping stats drop: 0
Port block alloc fail: 0
IP alias add fail: 0
Limit entry add fail: 0
router1439#show ip nat translation
Total number of translations: 0

I also did check if those IP is configured, but not.

Spoiler

router1439#sh run | inc 10.51.38.150
router1439#

[MHM Cisco World]

I will run lab and check, just for info.
first 
you have hsrp run between two core ??
and there is no nat ? confirmed
and the proxy arp is disable ? please confirm 
and there is no dhcp exclude for these IP in any router ? please confirm 

[jbaros]

Hello MHM,

Here are my replies:

you have hsrp run between two core ?? - NO for subinterface 950, for other sub interfaces I use HSRP
and the

proxy arp 

is disable ? - YES,

no ip proxy-arp 

on each interface including subinterfaces
and there is no dhcp exclude for these IP in any router ? NO DHCP for 10.51.38.128/27 at all, this is static range

Thank you for your checks.

[jbaros · Accepted solution]

Thank You for your answers, I have fixed it - by workaround. I have moved admin interface to redundant router, and now on new router it is working good, I dont see any non-existing IP addresses in my routing table.

But I didnt find out what caused the issue