Cisco Catalyst 3550 Series User Manual

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Catalyst 3550 Multilayer Switch Software Configuration Guide
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Chapter 34 Configuring IP Multicast Routing
Configuring Advanced DVMRP Interoperability Features
Controlling Route Exchanges
These sections describe how to tune the Cisco device advertisements of DVMRP routes:
• Limiting the Number of DVMRP Routes Advertised, page 34-53
• Changing the DVMRP Route Threshold, page 34-54
• Configuring a DVMRP Summary Address, page 34-54
• Disabling DVMRP Autosummarization, page 34-56
• Adding a Metric Offset to the DVMRP Route, page 34-56
Limiting the Number of DVMRP Routes Advertised
By default, only 7000 DVMRP routes are advertised over an interface enabled to run DVMRP (that is,
a DVMRP tunnel, an interface where a DVMRP neighbor has been discovered, or an interface configured
to run the ip dvmrp unicast-routing interface configuration command).
Beginning in privileged EXEC mode, follow these steps to change the DVMRP route limit:
To configure no route limit, use the no ip dvmrp route-limit global configuration command.
Command Purpose
Step 1
configure terminal Enter global configuration mode.
Step 2
ip dvmrp route-limit count Change the number of DVMRP routes advertised over an interface
enabled for DVMRP.
This command prevents misconfigured ip dvmrp metric interface
configuration commands from causing massive route injection into the
MBONE.
By default, 7000 routes are advertised. The range is 0 to 4294967295.
Step 3
end Return to privileged EXEC mode.
Step 4
show running-config Verify your entries.
Step 5
copy running-config startup-config (Optional) Save your entries in the configuration file.

Cisco Catalyst 3550 Series Specifications

General

Form Factor	Rack-mountable
Manageable	Yes
RAM	64 MB
Device Type	Switch
MAC Address Table Size	12000 entries
Routing Protocol	RIP
Features	VLAN support
Power Supply	AC 120/230 V (50/60 Hz)
Ports	24 or 48 x 10/100Base-TX, 1 x GBIC, 2 x 10/100/1000Base-T
Operating Temperature	32 to 113°F (0 to 45°C)