We have some switchports on Aruba 2930 that are configured for a GRE tunnel back to our controller.I can only place the command 'Jumbo" on the VLAN interface of the 2930.The uplink router is Cisco router. I need to change the MTU size on the WAN interface ?Would the proper size for the tunnel be "ip mtu 1514" ?Or another size ?
use MTU 1600
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