Foundry Configuration Guide for the FESX, FSX, and FWSX
16 - 32
© Foundry Networks, Inc.
December 2005
•
Source-route-failure – The device received a source-routed packet but cannot locate the next-hop IP address
indicated in the packet’s Source-Route option.
You can disable the Foundry 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 Foundry device’s 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 following command:
FESX424 Router(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 Don’t-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:
FESX424 Router(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:
FESX424 Router(config)# ip icmp unreachable host
Configuring Static Routes
The IP route table can receive routes from the following sources:
•
Directly-connected networks – When you add an IP interface, the Layer 3 Switch automatically creates a
route for the network the interface is in.
•
RIP – If RIP is enabled, the Layer 3 Switch can learn about routes from the advertisements other RIP routers
send to the Layer 3 Switch. If the route has a lower administrative distance than any other routes from
different sources to the same destination, the Layer 3 Switch places the route in the IP route table.
•
OSPF – See RIP, but substitute “OSPF” for “RIP”.
•
BGP4 – See RIP, but substitute “BGP4” for “RIP”.
•
Default network route – A statically configured default route that the Layer 3 Switch uses if other default routes
to the destination are not available. See “Configuring a Default Network Route” on page 16-39.
•
Statically configured route – You can add routes directly to the route table. When you add a route to the IP
route table, you are creating a static IP route. This section describes how to add static routes to the IP route
table.
Содержание FastIron Edge Switch X424
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