Brocade Multi-Service IronWare Switching Configuration Gui Manual de usuario descargar pdf (Pagina 846)

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816 Multi-Service IronWare Switching Configuration Guide

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Configuring IP load sharing

NOTE

If the setting for the maximum number of paths is lower than the actual number of equal-cost paths,

the software does not use all the paths for load sharing.

To change the maximum number of load sharing paths, enter the following command:

Brocade(config)# ip load-sharing 32

Syntax: [no] ip load-sharing number

The number parameter specifies the number of ECMP load sharing paths. Enter a value between 2

and 32 for number to set the maximum number of paths. The default value is 4.

NOTE

A new maximum-paths use-load-sharing command was introduced under the BGP configuration that

allows support for BGP routes in IP load sharing but does not enable BGP multipath load sharing.

Response to path state changes

If one of the load-balanced paths becomes unavailable, the IP route table in hardware is modified

to stop using the unavailable path. The traffic is load balanced between the available paths using

the same hashing mechanism described above. (Refer to “How IP load sharing works” on

page 815.)

Configuring IRDP

The Brocade device uses ICMP Router Discovery Protocol (IRDP) to advertise the IP addresses of its

device interfaces to directly attached hosts. IRDP is disabled by default. You can enable it globally

or on individual ports.

Consider the following when you enable or disable IRDP globally:

• If you enable IRDP globally, all ports use the default values for the IRDP parameters.

• If you leave IRDP disabled globally but enable it on individual ports, you also can configure the

IRDP parameters on an individual port basis.

NOTE

You can configure IRDP parameters only an individual port basis. To do so, IRDP must be

disabled globally and enabled only on individual ports. You cannot configure IRDP parameters

if the feature is globally enabled.

When IRDP is enabled, the Brocade device periodically sends Router Advertisement messages out

the IP interfaces on which the feature is enabled. The messages advertise the Brocade device’s IP

addresses to directly attached hosts who listen for the messages. In addition, hosts can be

configured to query the Brocade device for the information by sending Router Solicitation

messages.

Some types of hosts use the Router Solicitation messages to discover their default gateway. When

IRDP is enabled, the Brocade device responds to the Router Solicitation messages. Some clients

interpret this response to mean that the Brocade device is the default gateway. If another router is

actually the default gateway for these clients, leave IRDP disabled on the Brocade device.

IRDP uses the following parameters. If you enable IRDP on individual ports rather than globally, you

can configure these parameters on an individual port basis. The IRDP parameters are as follows:

1 2 ... 841 842 843 844 845 846 847 848 849 850 851 ... 983 984

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