HELP!!!!!! %IP_VFR-4-FRAG_TABLE_OVERFLOW:

From: Uyota Oyearone (spycharlies@gmail.com)
Date: Tue Mar 31 2009 - 15:34:44 ART


Hi experts,

Just wondering if any one has come across this issue.

I have a home lab setup with 3 sites. Everything seems to be working ok
including VOIP and all other traffic going thru the GRE IPSec tunnels.

But sometimes my router freaks out with an error message especially when my
domain controllers are replicating

" %IP_VFR-4-FRAG_TABLE_OVERFLOW: FastEthernet0/0: the fragment
 table has reached its maximum threshold 16 "

Here is part of my router configs

=*=
interface Tunnel12
 description TUNNEL_TO_R2
 ip address 192.168.12.1 255.255.255.0
 ip mtu 1500
 ip tcp adjust-mss 1400
 keepalive 10 3
 tunnel source 10.100.200.251
 tunnel destination 10.100.200.252
!
interface Tunnel13
 description TUNNEL_TO_R3
 ip address 192.168.13.1 255.255.255.0
 ip mtu 1500
 ip tcp adjust-mss 1400
 keepalive 10 3
 tunnel source 10.100.200.251
 tunnel destination 10.100.200.250
!
interface FastEthernet0/0
 description Connected_to_WAN
 ip address 10.100.200.251 255.255.255.0
 ip access-group EXTERNAL_SOURCES in
 no ip proxy-arp
 ip nat outside
 ip virtual-reassembly
 duplex auto
 speed auto
 no cdp enable
 crypto map vpn
!
interface FastEthernet0/1
 description CONNECTED_TO_LAN
 ip address 192.168.10.1 255.255.255.0
 ip nat inside
 ip virtual-reassembly
 duplex auto
 speed auto

=*=

#sh ip virtual-reassembly
FastEthernet0/0:
   Virtual Fragment Reassembly (VFR) is ENABLED...
   Concurrent reassemblies (max-reassemblies): 16
   Fragments per reassembly (max-fragments): 32
   Reassembly timeout (timeout): 3 seconds
   Drop fragments: OFF
   Current reassembly count:0
   Current fragment count:0
   Total reassembly count:127175
   Total reassembly timeout count:0
FastEthernet0/1:
   Virtual Fragment Reassembly (VFR) is ENABLED...
   Concurrent reassemblies (max-reassemblies): 16
   Fragments per reassembly (max-fragments): 32
   Reassembly timeout (timeout): 3 seconds
   Drop fragments: OFF
   Current reassembly count:0
   Current fragment count:0
   Total reassembly count:0
   Total reassembly timeout count:0

=*=

Sugestions Welcomed !

Thanks,

Uyota 0.

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