Installation and Getting Started Guide

Syntax: [no] ip icmp unreachable [network host protocol administration fragmentation-needed port source-route-fail]

If you enter the command without specifying a message type (as in the example above), all types of ICMP Unreachable messages listed above are disabled. If you want to disable only specific types of ICMP Unreachable messages, you can specify the message type. To disable more than one type of ICMP message, enter the no ip icmp unreachable command for each messages type.

•The network parameter disables ICMP Network Unreachable messages.

•The host parameter disables ICMP Host Unreachable messages.

•The protocol parameter disables ICMP Protocol Unreachable messages.

•The administration parameter disables ICMP Unreachable (caused by Administration action) messages.

•The fragmentation-neededparameter disables ICMP Fragmentation-Needed But Don’t-Fragment Bit Set messages.

•The port parameter disables ICMP Port Unreachable messages.

•The source-route-failparameter disables ICMP Unreachable (caused by Source-Route-Failure) messages.

To disable ICMP Host Unreachable messages and ICMP Network Unreachable messages but leave the other types of ICMP Unreachable messages enabled, enter the following commands instead of the command shown above:

HP9300(config)# no ip icmp unreachable host

HP9300(config)# no ip icmp unreachable network

If you have disabled all ICMP Unreachable message types but you want to re-enable certain types, you can do so entering commands such as the following:

HP9300(config)# ip icmp unreachable host

HP9300(config)# ip icmp unreachable network

The commands shown above re-enable ICMP Unreachable Host messages and ICMP Network Unreachable messages.

USING THE WEB MANAGEMENT INTERFACE

You cannot disable ICMP Destination Unreachable messages using the Web management interface.

Disabling ICMP Redirects

You can disable ICMP redirects on a global basis or on an individual port basis. To disable ICMP redirects globally, enter the following command at the global CONFIG level of the CLI:

HP9300(config)# no ip icmp redirects

Syntax: [no] ip icmp redirects

To disable ICMP redirects on a specific interface, enter the same command at the configuration level for the interface:

HP9300(config)# int e 3/11

HP9300(config-if-e100-3/11)# no ip redirect

Syntax: [no] ip redirect

Configuring Static Routes

The IP route table can receive routes from the following sources:

•Directly-connected networks – When you add an IP interface, the routing switch automatically creates a route for the network the interface is in.

•RIP – If RIP is enabled, the routing switch can learn about routes from the advertisements other RIP routers send to the routing switch. If the route has a lower administrative distance than any other routes from different

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