Dell PowerConnect 6224, Command Line Interface Manual, Page: 722 / 1372

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IP Routing Commands
stack uses its default IP MTU and ignores the value set using the ip mtu
command. OSPF advertises the IP MTU in the Database Description packets
it sends to its neighbors during database exchange. If two OSPF neighbors
advertise different IP MTUs, they will not form an adjacency (unless OSPF
has been instructed to ignore differences in IP MTU with the ip ospf
mtuignore command).
Syntax
ip mtu
integer
•
integer
— Specifies the distance (preference) of an individual static route.
(Range: 68-9198)
Default Configuration
1500 bytes is the default configuration.
Command Mode
Interface Configuration (VLAN) mode
User Guidelines
This command has no user guidelines.
Example
The following example defines 1480 as the MTU for VLAN 15.
console(config)#interface vlan 15
console(config-if-vlan15)#ip mtu 1480
ip netdirbcast
Use the ip netdirbcast command in Interface Configuration mode to enable
the forwarding of network-directed broadcasts. When enabled, network
directed broadcasts are forwarded. When disabled they are dropped. Use the
no form of the command to disable the broadcasts.
Syntax
ip netdirbcast