Avaya G250 Administration page 418

Configuring the router
5. In most cases, it is recommended to configure dynamic MTU discovery in the tunnel. This
prevents fragmentation of packets larger than the tunnel's MTU. When dynamic MTU
discovery is not enabled, the tunnel fragments packets larger than the tunnel's MTU, even
when the packet is marked do not fragment. For more information on dynamic MTU
discovery, see
The following example configures dynamic MTU discovery, with an age timer of 15
minutes.
G350-001(super-if:Tunnel 2)# tunnel path-mtu-discovery age-timer 15
Done!
G350-001(super-if:Tunnel 2)#
6. Type the copy running-config startup-config command. This saves the new
tunnel interface configuration in the startup configuration file.
For a list of optional GRE tunnel features, refer to
For a list of additional GRE tunnel CLI commands, refer to
parameters on page 419.
418 Administration for the Avaya G250 and Avaya G350 Media Gateways
Dynamic MTU discovery on page 416.
Optional GRE tunnel features
Additional GRE tunnel
on page 415.