Routing Commands
240
M4100 Series ProSAFE Managed Switches
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.)
Note: The IP MTU size refers to the maximum size of the IP packet (IP
Header + IP payload). It does not include any extra bytes that might
be required for Layer-2 headers. To receive and process packets, the
Ethernet MTU must take into account the size of the Ethernet header.
no ip mtu
This command resets the IP MTU to the default value.
encapsulation
This command configures the link layer encapsulation type for the packet. The encapsulation
type can be ethernet or snap.
Note: Routed frames are always Ethernet encapsulated when a frame is
routed to a VLAN.
clear ip route all
This command removes all the route entries learned over the network.
Default 1500 bytes
Format ip mtu <68-9198>
Mode Interface Config
Format no ip mtu
Mode Interface Config
Default ethernet
Format encapsulation {ethernet | snap}
Mode Interface Config
Format clear ip route all
Mode Privileged EXEC