12-24-2012 02:15 AM - edited 03-07-2019 10:45 AM
Hi,
I am getting the following error on my routers:
%IP_VFR-4-FRAG_TABLE_OVERFLOW: GigabitEthernet0/1: the fragment table has reached its maximum threshold 16
I guess this may be affecting OSPF as I constantly see the following error:
Dec 24 09:38:50.685: %IP_VFR-4-FRAG_TABLE_OVERFLOW: GigabitEthernet0/1: the fragment table has reached its maximum threshold 16
Dec 24 09:39:10.097: %OSPF-5-ADJCHG: Process 10, Nbr X.X.X.X on Tunnel19 from FULL to DOWN, Neighbor Down: Dead timer expired
Dec 24 09:39:37.057: %OSPF-5-ADJCHG: Process 10, Nbr X.X.X.X on Tunnel19 from LOADING to FULL, Loading Done
I changed the setting on the GigabitEthernet0/1 as:
interface GigabitEthernet0/1
ip virtual-reassembly max-fragments 64
It has not made any difference and still getting
%IP_VFR-4-FRAG_TABLE_OVERFLOW: GigabitEthernet0/1: the fragment table has reached its maximum threshold 16
I am not sure why is it still saying that maximum threshold is 16. Appears that rotuer is not picking up the new configuration, haven't rebooted the router. Any help and suggestion will be much appreciated.
Thanks in advance.
regards,
RS
12-24-2012 05:03 AM
The source of problem is the fragmentation. I would try and address that, setting the proper MTU and TCP adjust mss first.
OSPF neighbors need to agree on the MTU for the link, unless use ip OSPF mtu-ignore on the interface.
Sent from Cisco Technical Support Android App
12-24-2012 06:39 AM
Thanks for responding SOcchiogrosso
I do have MTU and MSS setup on interfaces and as for this scenario, I have "ip ospf mtu-ignore" statement on the interface.
12-24-2012 06:44 AM
What IOS version are you running?
Is OSPF constanty bouncing or something random?
--
CCNP, CCIP, CCDP, CCNA: Security/Wireless
Blog: http://ccie-or-null.net/
12-24-2012 06:52 AM
It is bouncing constantly every few minutes.
IOS: universalk9-mz.SPA.150-1.M7.bin
12-24-2012 06:45 AM
Configure for any NAT interface:
no ip virtual-reassembly.
12-27-2012 12:43 AM
the interface has got "ip nat inside" command on it
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