In our DMVPN configuration I am seeing fragmentation / reassembly counters increasing, but I don't know what would be considered too many or too high a rate.
DMVPN with GODI over MPLS
Router Tunnel Interfaces configured similarily
ip mtu 1400
ip tcp adjust-mss 1360
Physical interfaces associated with Tunnel have 1500 MTU
Issuing Show IP Traffic, IP counters are;
Frags: 27262619 reassembled, 22261 timeouts, 0 couldn't reassemble
3577061 fragmented, 7155711 fragments, 293 couldn't fragment
Command issued a few minutes later shows;
Frags: 27263830 reassembled, 22261 timeouts, 0 couldn't reassemble
3578119 fragmented, 7157827 fragments, 293 couldn't fragment
Router has been up for 1 week.
To me these numbers seem high, but I believe I have accounted for the proper over head in my Tunnel MTU and MSS values.
Are these counters too high?
How can I lower these frags and reassemblies?
I have been referring to Cisco document ID 25885 are there other sources?
thanks in advance