Foundry Networks Switch and Router Installation And Configuration Manual page 282

Foundry Switch and Router Installation and Configuration Guide
3. Select the Port link to display the Port table.
4. Click on the Modify button next to the row of information for the port you want to reconfigure.
5. Select one of the following values from the Gig Port Default field's pulldown menu:
• Default – The port uses the negotiation mode that was set at the global level.
• Neg-off – The port does not try to perform a handshake. Instead, the port uses configuration information
manually configured by an administrator.
• Auto-Gig – The port tries to perform a handshake with the other port to exchange capability information.
• Neg-Full-Auto – The port first tries to perform a handshake with the other port to exchange capability
information. If the other port does not respond to the handshake attempt, the port uses the manually
configured configuration information (or the defaults if an administrator has not set the information).
6. Click Apply to save the changes to the device's running-config file.
7. Select the Save link at the bottom of the dialog. Select Yes when prompted to save the configuration change
to the startup-config file on the device's flash memory.
Limiting Broadcast, Multicast, or Unknown-Unicast Rates
Foundry devices forward all traffic at wire speed. However, some third-party networking devices cannot handle
high forwarding rates for these types of packets. You can limit the number of broadcast, multicast, or unknown-
unicast packets a Foundry device forwards each second using the following methods.
The limits are individually configurable for broadcasts, multicasts, and unknown-unicasts.
NOTE: By default, IP Multicast (including IGMP) is disabled. You can enable it using the ip multicast passive |
active command. As long as IP Multicast is enabled (regardless of whether it is passive or active), no IP Multicast
packets (not even IGMP packets) are limited. See "Configuring IP Multicast Traffic Reduction (Layer 2 Switches
only)" on page 10-56.
Limiting Broadcasts
To limit the number of broadcast packets a Foundry device can forward each second, use the following CLI
method.
USING THE CLI
To globally limit the number of broadcast packets a BigIron router forwards to 100,000 per second, enter the
following command at the global CONFIG level of the CLI:
BigIron(config)# broadcast limit 100000
BigIron(config)# write memory
To limit the number of broadcast packets sent on port 1/3 to 80,000, enter the following commands:
BigIron(config)# int ethernet 1/3
BigIron(config-if-1/3)# broadcast limit 80000
BigIron(config-if-1/3)# write memory
USING THE WEB MANAGEMENT INTERFACE
You cannot perform this procedure using the Web management interface.
Limiting Multicasts
To limit the number of multicast packets a Foundry device can forward each second, use the following CLI
method.
USING THE CLI
To globally limit the number of multicast packets a BigIron router forwards to 120,000 per second, enter the
following command at the global CONFIG level of the CLI:
10 - 24 December 2000