Ruijie RG-S2900G-E Series, Configuration Manual

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Configuration Guide IP Address and Service Configuration
network 192.168.12.0
IP Service Configuration
IP Service Configuration Task List
The IP service configuration includes the following optional configuration tasks.
You can perform the task according to the requirements:

Configuring the default gateway

Managing IP connections
Managing IP Connections
The IP protocol stack offers a number of services to control and manage IP
connections. Internet Control Message Protocol (ICMP) provides many of these
services. Once a network problem occurs, a router or access server will send
an ICMP message to the host or other rotuers. For detailed information on ICMP,
see RFC 792.
To manage various aspects of IP connections, perform the optional tasks
described in the following sections:

Enabling ICMP Protocol Unreachable Messages

Enabling ICMP Redirect Messages

Enabling ICMP Mask Reply Messages

Setting the IP MTU

Configuring IP Source Routing
Enabling the ICMP Protocol Unreachable Message
When a router receives a non-broadcast packet destined to it, and this packet
uses an IP protocol that it cannot handle, it will return an ICMP protocol
unreachable message to the source address. Similarly, if the router is unable to
forward the packet because it knows of no route to the destination address, it
sends an ICMP host unreachable message. This feature is enabled by default.
To enable this service, execute the following command in the interface
configuration mode:
Command Function
Ruijie(config-if)# ip unreachables
Enable the ICMP protocol unreachable
and host unreachable messages.
Ruijie(config-if)# no ip unreachables
Disable the ICMP protocol unreachable
and host unreachable messages.