Filter
Top Products
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-needed parameter disables ICMP Fragmentation-Needed But Don’t-Fragment Bit Set
messages.
• The port parameter disables ICMP Port Unreachable messages.
• The source-route-fail parameter 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
6 - 36