Ok, have applied that command and the output is now as follows...
Main Topics
Browse All TopicsDuring the last hour, my Cisco 1701 router has giving the following warnings.
Can someone please advise on the cause and the fix please.
Thanks
(PS: Ignore the date/time stamps - the clock isn't set correctly)
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Hi,
These are the buffer sizes to fragment the packets. Please sendd me the configuration, so i can check the MTU values. Also send an output of the command: show interface [enter]
Please set this settings on the dialer 0 interface first:
ip virtual-reassembly max-fragments 32 [enter]
ip virtual-reassembly max-reassemblies 64 [enter]
And see if the warning message has gone ....
A/
Hi,
Thanks for the info.
These are values of the MTU per interface:
ATM0 - MTU 4470 bytes
Dialer1 - MTU 1500 bytes
Virtual-Access2 - MTU 1500 bytes
FastEthernet0 - MTU 1500 bytes
As you can see the ATM interface has a bigger MTU fram size. So the other interfaces need to "chop" these frames into a smaller size to can handle the traffic.
Cisco uses as default a MTU size of 4470 Bytes for ATM interfaces. So you can keep this value. We have adjust the max-fragments and the max-reassemblies to resp 32 and 64 so the warning is no coming back.
Please confirm this ....
A/
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by: wiscomPosted on 2009-08-29 at 11:34:29ID: 25214881
Hi,
LOW: [chars]: the fragment table has reached its maximum threshold [dec]
/docs/ios/ 12_3t/12_3 t8/feature / guide/gt_ vfrag.html #wp1047243
%IP_VFR-4-FRAG_TABLE_OVERF
The number of datagrams being reassembled at any one time has reached it maximum limit.
Recommended Action: Increase the maximum number of datagrams that can be reassembled by entering the ip virtual-reassembly max-reassemblies number command, with number being the maximum number of datagrams that can be reassembled at any one time.
Type this in the Dialer interface. :
ip virtual-reassembly max-reassemblies 32
Default value is 16.
show ip virtual-reassembly
More info: http://www.cisco.com/en/US
A/