240 Ethernet Configuration Commands
Default Configuration
The default number of bytes is 1518 (1522 bytes of VLAN-tagged frames).
Command Mode
Interface Configuration (Ethernet) mode
User Guidelines
The value set allows an additional four bytes for the VLAN tag.
Example
The following example of the mtu command increases maximum packet size to 9216 bytes.
console(config-if-1/g5)#mtu 9216
negotiation
Use the negotiation command in Interface Configuration mode to enable auto-negotiation 
operation for the speed and duplex parameters of a given interface. To disable negotiation, use 
the no form of this command.
Syntax
negotiation [capability1  [capability2…capability5]]
no negotiation
•
capabilities
 — Specifies capabilities to advertise. (Possible values: 10h, 10f, 100h, 
100f, and 1000f) 
Default Configuration
If unspecified, defaults to list of all capabilities of the port.
Command Mode
Interface Configuration (Ethernet) mode
User Guidelines
Entering the command negotiation with no parameters enables all capabilities. Note that if you 
have previously entered negotiation with capabilities, this action overwrites the previous 
configuration so that all capabilities are enabled.
Example
The following example enables auto negotiations on gigabit Ethernet port 5 of unit 1.