IP_VFR-4-FRAG_TABLE_OVERFLOW: Vlan1: the fragment table has reac
IP_VFR-4-FRAG_TABLE_OVERFLOW: Vlan1: the fragment table has reached its maximum threshold 16
%IP_VFR-4-FRAG_TABLE_OVERFLOW: [chars]: the fragment table has reached its maximum threshold [dec]
The number of datagrams being reassembled at any one time has reached it maximum limit.
Virtual fragmentation reassembly (VFR) It is typically used for nat and some other layer 4 features as fragmented IP will only have the layer 4 header in the first fragment. So we need to keep the fragments and reassemble them to make sure that nat is performed the same on all fragments or the other fragments are classified the same.
VFR will cause a performance impact on the basis of functions such as packet copying, fragment validation, and fragment reorder. This performance impact will vary depending on the number of concurrent IP datagram that are being reassembled.
On Router, there is a buffer that holds fragments for reassembly. The FRAG_TABLE refers to that. If too many fragmented datagrams are received, that buffer will get full and you will receive the FRAG_TABLE_OVERFLOW error.
You can increase the size of the buffer using ip "virtual-reassembly max-reassemblies <number>"command
with number being the maximum number of datagrams that can be reassembled at any one time.
But more importantly you should look at why so many fragments are coming in, pointing to a possible MTU issue somewhere along your network path. It looks like some device is fragmenting and sending in too many fragments to your router and once its buffer gets full it throws that error.
Please check show ip route to understand the statistics
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This is actually a pretty cool feature, i didn't even know it existed until I was looking for a solution to advertise a subnet (prefix in BGP talk), only if a certain condition existed. This is exactly what conditional advertisements does
j ai une question j ai achete un routeur cisco 887VA-k9 , je le configuré avec la configuration ci- dessous
si je le lier avec mon pc portable sur l un de ses ports directement ça marche toute est bien ( la connexion internet + m...
Attached policy provides CLI access to the Cisco 4G router over text messaging. Two files are in the attached .tar file:
2. PDF with instructions on how to load and use the .tcl file.