Routing Commands
183
ProSAFE M7100 Managed Switches
no ip route distance
This command sets the default static route preference value in the router. Lower route
pref
erence values are preferred when determining the best route.
ip netdirbcast
This command enables the forwarding of network-directed broadcasts. When enabled, network
directed broadcasts are forwarded. When disabled they are dropped.
no ip netdirbcast
This command disables the forwarding of network-directed broadcasts. When disabled, network
directed broadcasts are dropped.
ip mtu
This command sets the IP maximum transmission unit (MTU) on a routing interface. The IP MTU is
the size of the largest IP packet that can be transmitted on the interface without fragmentation.
The software currently does not fragment IP packets.
• Packets forwarded in hardware ignore the IP MTU.
• Packets forwarded in software are dropped if they exceed the IP MTU of the outgoing
int
erface.
Packets originated on the router, such as OSPF packets, might be fragmented by the IP stack. The
IP 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
mtu-ignore command.)
Format no ip route distance
Mode Global Config
Default disabled
Format ip netdirbcast
Mode Interface Config
Format no ip netdirbcast
Mode Interface Config
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