Ip Forwarding; Ip Mtu - NETGEAR GSM7328Sv1 - ProSafe 24+4 Gigabit Ethernet L3 Managed Stackable Switch Cli Reference Manual

Command Line Interface Reference for the ProSafe 7300S Series Layer-3 Stackable Switches,

14.2.7 ip forwarding

This command enables forwarding of IP frames.
Default
Format
Mode
14.2.7.1 no ip forwarding
This command disables forwarding of IP frames.
Format
Mode

14.2.8 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 7300S Series Stackable Switch 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
interface.
Packets originated on the router, such as OSPF packets, may 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.)
Note: The IP MTU size refers to the maximum size of the IP packet (IP Header +
The minimum IP MTU is 68 bytes.The maximum IP MTU is 1500 bytes.
Default
14-10
enabled
ip forwarding
Global Config
no ip forwarding
Global Config
IP payload). It does not include any extra bytes that may be required for
Layer-2 headers. To receive and process packets, the Ethernet MTU must
take into account the size of the Ethernet header.
1500 bytes
v4.1, October 2008
Routing Commands