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Cisco ME 3400 EthernetAccess Switch SoftwareConfiguration Guide
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Chapter32 Configuring IP Unicast Routing
Configuring IP Addressing
If you change the maxadvertinterval value, the holdtime and minadvertinterval values also change,
so it is important to first change the maxadvertinterval value, before manually changing either the
holdtime or minadvertinterval values.
Use the no ip irdp interface configuration command to disable IRDP routing.
Configuring Broadcast Packet Handling
After configuring an IP interface address, you can enable routi ng and co nfigure one or mo re ro uti ng
protocols, or you can configure the way the switch responds to network broadcasts. A broadcast is a da ta
packet destined for all hosts on a physical network. The switch supports two kinds of broadcasting:
•A directed broadcast packet is sent to a specific network or series of networks. A directed broad cast
address includes the network or subnet fields.
•A flooded broadcast packet is sent to every network.
Note You can also limit broadcast, unicast, and multicast traffic on Layer 2 interfaces by using the
storm-control interface configuration command to set traffic suppression le vels. For more information ,
see Chapter21, “Configuring Port-Based Traffic Control.”
Step5 ip irdp multicast (Optional) Send IRDP advertisements to the multic ast ad dres s
(224.0.0.1) instead of IP broadcasts.
Note This command allows for compatibility with Sun Microsystems
Solaris, which requires IRDP packets to be sent out as multicasts.
Many implementations cannot receive these multicasts; ensure
end-host ability before using this command.
Step6 ip irdp holdtime seconds (Optional) Set the IRDP period for which advertisements are valid. The
default is three times the maxadvertinterval value. It must be greater
than maxadvertinterval and cannot be greater than 9000 seconds. If you
change the maxadvertinterval value, this value also changes.
Step7 ip irdp maxadvertinterval seconds (Optional) Set the IRDP maximum interval between advertisements. The
default is 600 seconds.
Step8 ip irdp minadvertinterval seconds (Optional) Set the IRDP minimum interval between advertisements. The
default is 0.75 times the maxadvertinterval. If you change the
maxadvertinterval, this value changes to the new default (0.75 of
maxadvertinterval).
Step9 ip irdp preference number (Optional) Set a device IRDP preference level. The allowed range is –231
to 231. The default is 0. A higher value increases the router preference
level.
Step10 ip irdp address address [number] (Optional) Specify an IRDP address and preference to pr oxy -advert ise.
Step11 end Return to privileged EXEC mode.
Step12 show ip irdp Verify settings by displaying IRDP values.
Step13 copy running-config startup-config (Optional) Save your entries in the configuration file.
Command Purpose