Cisco Support Community
cancel
Showing results for 
Search instead for 
Did you mean: 
New Member

%IP-3-LOOPPAK: Looping packet detected and dropped -

Hi

I am getting an error msg on my core through the CNA repeated.

X-Mailer: Cisco Network Assistant System Messages Notification Mailer

Device: CGCCORESW01

005773: *Mar  8 05:19:54: %IP-3-LOOPPAK: Looping packet detected and dropped

-

Can anyone suggest me what should i do to resolve the problem.

Thanks and Regards

Saurav Tripathy

1 ACCEPTED SOLUTION

Accepted Solutions
New Member

Re: %IP-3-LOOPPAK: Looping packet detected and dropped -

Hi,

    As per my knowledge the reason could be this :

The %IP-3-LOOPPAK: Looping packet detected and dropped error message is received because of a looping packet that has been detected. A common cause is a misconfiguration of an IP helper address. The helper address should be the same address as that of the server of the intended service. Putting the address of the router in the helper address causes a routing loop to be created.

The recommended action is to analyze the source and destination address of the looped packets and verify that the configuration of the IP helper addresses in the router correctly points to the right device and does not point to the local router itself.

This reason is well known in Cisco documentation also. Go to that router and check the configuration.

you can visit : http://www.cisco.com/en/US/products/hw/routers/ps341/products_tech_note09186a008009446a.shtml

Uttam

3 REPLIES
New Member

Re: %IP-3-LOOPPAK: Looping packet detected and dropped -

Hi,

    As per my knowledge the reason could be this :

The %IP-3-LOOPPAK: Looping packet detected and dropped error message is received because of a looping packet that has been detected. A common cause is a misconfiguration of an IP helper address. The helper address should be the same address as that of the server of the intended service. Putting the address of the router in the helper address causes a routing loop to be created.

The recommended action is to analyze the source and destination address of the looped packets and verify that the configuration of the IP helper addresses in the router correctly points to the right device and does not point to the local router itself.

This reason is well known in Cisco documentation also. Go to that router and check the configuration.

you can visit : http://www.cisco.com/en/US/products/hw/routers/ps341/products_tech_note09186a008009446a.shtml

Uttam

New Member

I had the same issue and it

I had the same issue and it was exactly the reason which was explained by Uttam ..

 

Mar 17 10:39:37.813 CET: %IP-3-LOOPPAK: Looping packet detected and dropped -

src=10.124.218.34, dst=10.124.219.1, hl=20, tl=229, prot=17, sport=138, dport=138

in=GigabitEthernet0/0, nexthop=10.124.219.1, out=GigabitEthernet0/0

options=none -Process= "IP Input", ipl= 0, pid= 120

 

Solution :

interface Vlan1

description *** Cutomer LAN Interface ***

ip address 10.124.219.3 255.255.255.0 secondary

ip address 10.124.218.3 255.255.255.0

ip access-group 110 in

ip helper-address 10.71.2.15

ip helper-address 10.124.219.1  >>>> Pointing to HSRP SEc IP !! Removed now

no ip redirects

no ip proxy-arp

standby 10 ip 10.124.218.1

standby 10 ip 10.124.219.1 secondary

 

After that all works fine ..

Thx Uttam !!

 

 

New Member

Hello,

Hello,

Could this be causing any disconnections for the users?

Many thanks,

14542
Views
15
Helpful
3
Replies
CreatePlease to create content