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Cisco Cisco Email Security Appliance C160 Mode D'Emploi

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33-20
Cisco AsyncOS 8.0.1 for Email User Guide
 
Chapter 33      Advanced Network Configuration
  Ethernet Interface’s Maximum Transmission Unit
Figure 33-5
 
Creating a Listener on the New Loopback IP Interface
Ethernet Interface’s Maximum Transmission Unit
The maximum transmission unit (MTU) is the largest unit of data that an ethernet interface will accept. 
You can decrease the MTU for an ethernet interface using the 
etherconfig
 command. The default MTU 
size is 1500 bytes, which is the largest MTU that the ethernet interface can accept.
To edit an interface’s MTU:
mail3.example.com> etherconfig
Choose the operation you want to perform:
- MEDIA - View and edit ethernet media settings.
- PAIRING - View and configure NIC Pairing.
- VLAN - View and configure VLANs.
- LOOPBACK - View and configure Loopback.
- MTU - View and configure MTU.
[]> mtu
Ethernet interfaces:
1. Data 1 mtu 1400
2. Data 2 default mtu 1500
3. Management default mtu 1500