Brocade Communications Systems Layer 3 Routing Configuration ICX 6650 - Manual (Page 62)

44 Brocade ICX 6650 Layer 3 Routing Configuration Guide
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Configuring IP parameters – Layer 3 Switches
• Source-route-failure – The device received a source-routed packet but cannot locate the
next-hop IP address indicated in the packet Source-Route option.
You can disable the Brocade device from sending these types of ICMP messages on an individual
basis. To do so, use the following CLI method.
NOTE
Disabling an ICMP Unreachable message type does not change the Brocade device ability to forward
packets. Disabling ICMP Unreachable messages prevents the device from generating or forwarding
the Unreachable messages.
To disable all ICMP Unreachable messages, enter the no ip icmp unreachable command.
Brocade(config)# no ip icmp unreachable
Syntax: [no] ip icmp unreachable [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 administration parameter disables ICMP Unreachable (caused by Administration action)
messages.
• The fragmentation-needed parameter disables ICMP Fragmentation-Needed But Do
not-Fragment Bit Set messages.
• The host parameter disables ICMP Host Unreachable messages.
• The port parameter disables ICMP Port Unreachable messages.
• The protocol parameter disables ICMP Protocol Unreachable messages.
• The source-route-fail parameter disables ICMP Unreachable (caused by Source-Route-Failure)
messages.
To disable ICMP Host Unreachable messages but leave the other types of ICMP Unreachable
messages enabled, enter the following commands instead of the command shown above.
Brocade(config)# no ip icmp unreachable host
If you have disabled all ICMP Unreachable message types but you want to re-enable certain types,
for example ICMP Host Unreachable messages, you can do so by entering the following command.
Brocade(config)# ip icmp unreachable host
Disabling ICMP redirect messages
You can disable or re-enable ICMP redirect messages. By default, a Brocade Layer 3 Switch sends
an ICMP redirect message to the source of a misdirected packet in addition to forwarding the
packet to the appropriate router. You can disable ICMP redirect messages on a global basis or on
an individual port basis.
NOTE
The device forwards misdirected traffic to the appropriate router, even if you disable the redirect
messages.