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32-12
Cisco ME 3400 Ethernet Access Switch Software Configuration Guide
78-17058-01
Chapter 32 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 routing and configure one or more routing
protocols, or you can configure the way the switch responds to network broadcasts. A broadcast is a data
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 broadcast
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 levels. For more information,
see Chapter 21, “Configuring Port-Based Traffic Control.”
Step 5
ip irdp multicast (Optional) Send IRDP advertisements to the multicast address
(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.
Step 6
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.
Step 7
ip irdp maxadvertinterval seconds (Optional) Set the IRDP maximum interval between advertisements. The
default is 600 seconds.
Step 8
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).
Step 9
ip irdp preference number (Optional) Set a device IRDP preference level. The allowed range is –2
31
to 2
31
. The default is 0. A higher value increases the router preference
level.
Step 10
ip irdp address address [number] (Optional) Specify an IRDP address and preference to proxy-advertise.
Step 11
end Return to privileged EXEC mode.
Step 12
show ip irdp Verify settings by displaying IRDP values.
Step 13
copy running-config startup-config (Optional) Save your entries in the configuration file.
Command Purpose