Brocade Multi-Service IronWare Switching Configuration Gui Manual de usuario descargar pdf (Pagina 813)

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Multi-Service IronWare Switching Configuration Guide 783

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Configuring static routes

Disabling ICMP redirect messages

ICMP redirect messages can be disabled or re-enabled. By default, the Brocade device 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

An unusually high receipt of multiple Internet Control Message Protocol (ICMP) Redirect packets that

are used to change routing table entries in a short period of time may cause high CPU utilization.

This can be avoided by configuring the maximum ICMP error message rate using ip icmp

max-err-msg-rate command, 0 (minimum) to 5000 (maximum) error message per second. The

default value is 400.The total error rate for all IP interfaces (SYSTEM) is 10,000 errors per second.

NOTE

The device forwards misdirected traffic to the appropriate router, even if you disable the redirect

messages.

To disable ICMP redirect messages globally, enter the following command at the global CONFIG

level of the CLI.

NOTE

The ip icmp redirects command is applicable to the Brocade MLX Series and NetIron XMR Series

devices only.

Brocade(config)# no ip icmp redirects

Syntax: [no] ip icmp redirects

To disable ICMP redirect messages on a specific interface, enter the following command at the

configuration level for the interface.

Brocade(config)# int e 3/11

Brocade(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 Brocade device automatically

creates a route for the network the interface is in.

• RIP – If RIP is enabled, the Brocade device can learn about routes from the advertisements

other RIP routers send to the Brocade device. If the route has a lower administrative distance

than any other routes from different sources to the same destination, the Brocade device

places the route in the IP route table.

• OSPF – Refer to RIP, but substitute “OSPF” for “RIP”.

• BGP4 – Refer to RIP, but substitute “BGP4” for “RIP”.

• Default network route – A statically configured default route that the Brocade device uses if

other default routes to the destination are not available. Refer to “Configuring a default

network route” on page 800.

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