getting loop in the Network

[Chetanjha2]

Hi,

I am getting loop in the Network, Please help to prevent that. Below are the logs:

CORE-Switch#traceroute 172.29.51.234
Type escape sequence to abort.
Tracing the route to 172.29.51.234(Server)
VRF info: (vrf in name/id, vrf out name/id)
1 193.18.194.81 0 msec 0 msec 4 msec
2 172.29.61.251 0 msec 0 msec 0 msec
3 193.18.194.81 0 msec 0 msec 4 msec
4 172.29.61.251 0 msec 0 msec 0 msec
5 193.18.194.81 0 msec 0 msec 0 msec

====================================

CORE-Switch#sh ip route 172.29.51.234
Routing entry for 172.16.0.0/12, supernet
Known via "static", distance 1, metric 0
Redistributing via ospf 100, ospf 110
Routing Descriptor Blocks:
* 193.18.194.84
Route metric is 0, traffic share count is 1

-------------------------------------------------
CORE-Switch#sh ip route 193.18.194.81
Routing entry for 193.18.194.80/28
Known via "connected", distance 0, metric 0 (connected, via interface)
Redistributing via ospf 110
Advertised by ospf 110 subnets
Routing Descriptor Blocks:
* directly connected, via Vlan911
Route metric is 0, traffic share count is 1

--------------------------------------------------

CORE-Switch#sh ip route 172.29.61.251
Routing entry for 172.29.61.251/32
Known via "connected", distance 0, metric 0 (connected)
Routing Descriptor Blocks:
* directly connected, via Vlan911
Route metric is 0, traffic share count is 1

--------------------------------------------------

Vlan 911 configuration

CORE-Switch#sh run interface vlan 911
Building configuration...

Current configuration : 439 bytes
!
interface Vlan911
ip address 193.18.194.89 255.255.255.240 secondary
ip address 193.18.208.153 255.255.255.240 secondary
ip address 172.29.61.251 255.255.255.128
no ip redirects
standby 100 ip 172.29.61.254
standby 100 priority 110
standby 100 preempt
standby 201 ip 193.18.194.91
standby 201 ip 193.18.208.155 secondary
standby 201 priority 105
standby 201 preempt
end

Please let me know the solution

[balaji.bandi]

You need to give more information about network topology.

CORE-Switch#sh ip route 172.29.51.234
Routing entry for 172.16.0.0/12, supernet
Known via "static", distance 1, metric 0
Redistributing via ospf 100, ospf 110
Routing Descriptor Blocks:
* 193.18.194.84
Route metric is 0, traffic share count is 1

Do you have any idea this IP and what device "193.18.194.84" - Login and post your routing output from that device also to understand where the route learn from?

Also, what is the IP address  belong to the "172.29.51.234" end device? PC?

[Abdulila Alhosaine]

At first you need to fix the Problem with HSRP configuration. Please check the HSRP configuration on the another side. 

# sh standby

Then please post more information like the source of traceroute, the routing configuration

[Chetanjha2]

Hi,
Source of traceroute: 172.29.61.251(Core-Switch)
HSRP configuration on Local:
Vlan911 - Group 201
State is Active
1 state change, last state change 1y11w
Virtual IP address is 193.18.194.91
Secondary virtual IP address 193.18.208.155
Active virtual MAC address is 0000.0c07.acc9
Local virtual MAC address is 0000.0c07.acc9 (v1 default)
Hello time 3 sec, hold time 10 sec
Next hello sent in 0.512 secs
Preemption enabled
Active router is local
Standby router is 193.18.194.90, priority 100 (expires in 10.208 sec)
Priority 105 (configured 105)
Group name is "hsrp-Vl911-201" (default)
CORE-Switch#
----------------------------------------------
HSRP configuration of Standby router:
Vlan911 - Group 201
State is Standby
1 state change, last state change 1y11w
Virtual IP address is 193.18.194.91
Secondary virtual IP address 193.18.208.155
Active virtual MAC address is 0000.0c07.acc9
Local virtual MAC address is 0000.0c07.acc9 (v1 default)
Hello time 3 sec, hold time 10 sec
Next hello sent in 1.520 secs
Preemption enabled
Active router is 193.18.194.89, priority 105 (expires in 9.760 sec)
Standby router is local
Priority 100 (default 100)
Group name is "hsrp-Vl911-201" (default)
---------------------------------------------
Note: 193.18.194.81 is another end L3-Switch, but unfortunately i don't have access on it.

[Abdulila Alhosaine]

Please check the configuration for HSRP group 100.

[Chetanjha2]

Vlan 911 is associated with two HSRP group i.e., Group 100 and Group 210, Refer below logs:

Vlan911 - Group 100
State is Active
1 state change, last state change 1y11w
Virtual IP address is 172.29.61.254
Active virtual MAC address is 0000.0c07.ac64
Local virtual MAC address is 0000.0c07.ac64 (v1 default)
Hello time 3 sec, hold time 10 sec
Next hello sent in 1.984 secs
Preemption enabled
Active router is local
Standby router is 172.29.61.252, priority 100 (expires in 11.312 sec)
Priority 110 (configured 110)
Group name is "hsrp-Vl911-100" (default)
Vlan911 - Group 201
State is Active
1 state change, last state change 1y11w
Virtual IP address is 193.18.194.91
Secondary virtual IP address 193.18.208.155
Active virtual MAC address is 0000.0c07.acc9
Local virtual MAC address is 0000.0c07.acc9 (v1 default)
Hello time 3 sec, hold time 10 sec
Next hello sent in 0.864 secs
Preemption enabled
Active router is local
Standby router is 193.18.194.90, priority 100 (expires in 8.816 sec)
Priority 105 (configured 105)
Group name is "hsrp-Vl911-201" (default)

[paul driver]

Hello

It seems to suggest you are advertisng a connected interace 172.29.51.234/32 via ospf on one device and also have a static route on annohter device for 172.16.0.0/12 beig advertise

Routing entry for 172.29.61.251/32
Known via "connected", distance 0, metric 0 (connected)
Routing Descriptor Blocks:
* directly connected, via Vlan911

Routing entry for 172.16.0.0/12, supernet
Known via "static",
Redistributing via ospf 100, ospf 110
Routing Descriptor Blocks:
* 193.18.194.84