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DES-7200 Configuration Guide Chapter 1 IP Address and Service
Configuration
1-13
Command Function
DES-7200(config-if)# no ip redirects
Disable the ICMP redirect message.
1.2.2.3 Enabling the ICMP Mask Reply
Message
Occasionally, a network device needs to know the mask of a subnetwork in the
Internet. To obtain this information, the device can send the ICMP mask request
message. The receiving device will send the ICMP mask reply message.
DES-7200 product can respond the ICMP mask request message. This function
is enabled by default.
To enable the ICMP mask reply message, execute the following command in
the interface configuration mode:
Command Function
DES-7200(config-if)# ip mask-reply
Enable the ICMP mask reply message.
DES-7200(config-if)# no ip
mask-reply
Disable the ICMP mask reply message.
1.2.2.4 Setting the IP MTU
All interfaces have a default MTU (Maximum Transmission Unit) value. All the
packets which are larger than the MTU have to be fragmented before sending.
Otherwise it is unable to be forwarded on the interface.
DES-7200 product allows you to adjust the MTU on an interface. Changing the
MTU value can affect the IP MTU value, and the IP MTU value will be modified
automatically to match the new MTU. However, changing the IP MTU value has
no effect on the value of MTU.
The interfaces of a device in a physical network should have the same MTU for
a protocol.
To set the IP MTU, execute the following command in the interface configuration
mode:
Command Function
DES-7200(config-if)# ip mtu bytes
Set the MTU in the range 68 to 1500 bytes.
DES-7200(config-if)# no ip mtu
Restore the setting to the default.
1.2.2.5 Configuring IP Source Routing
DES-7200 product supports IP source routing. Upon receiving an IP packet, the
device will check its IP header like strict source route, loose source route and