Wired Intelligent Edge (Campus Switching and Routing)

Q:

What is the default MTU size on Aruba HPE Switches and how to validate the same?

Unlike Mobility Access Switches, who's MTU size is 1514 bytes by default, Aruba HPE Switch has a default MTU size of 1500 bytes only. To verify the MTU size on Aruba HPE Switch, collect "show tech all" and look for "ghsNetStatShow". This will show the MTU size for all the VLAN interface. There are no CLI commands available to increase/modify default MTU size on Aruba HPE Switch, but jumbo frames can be enabled on respective VLAN, if packet size are found to be exceeding 1500 bytes.

Aruba HPE Switches:

ghsNetStatShow

Destination                                       Gw                           
                 Iface    mtu   hops ttl         flags           
----------------------------------------------------------
10.16.0.0/16                                     *                            
                 vl2      1500  0    INF         U     C  
10.20.0.0/16                                     *                            
                 vl5      1500  0    INF         U     C  

Mobility Access Switches:

(ArubaS2500-24P) #show interface 0/0/0

GE0/0/0
-------
GE0/0/0 is administratively Up, Link is Down, Line protocol is Down
Hardware is Gigabit Ethernet, Interface is GE0/0/0, Address is 00:1a:1e:09:c5:42
Encapsulation ARPA, Loopback not set
Configured: duplex (Auto), Speed (Auto), FC (Off), Autoneg (On)
Auto negotiation in progress
Interface index: 1
MTU 1514 bytes
Link flaps: 0
Flags: Access, Trusted
Link status last changed:       0d 00:00:00 ago
Last update of counters:        0d 00:00:00 ago
Last clearing of counters:      0d 00:00:00 ago