Configuring Basic Software Features
December 2005 © Foundry Networks, Inc. 3 - 11
You can enter one of the following values for <time-zone>:
• US time zones (us): alaska, aleutian, arizona, central, east-indiana, eastern, hawaii, michigan, mountain,
pacific, samoa.
• GMT time zones (gmt): gmt+12, gmt+11, gmt+10...gmt+01, gmt+00, gmt-01...gmt-10, gmt-11, gmt-12.
Limiting Broadcast, Multicast, and Unknown Unicast Traffic
FastIron devices can forward all traffic at wire speed. However, some third-party networking devices cannot
handle high forwarding rates for broadcast, multicast, or unknown-unicast packets. You can limit the number of
broadcast, multicast, or unknown-unicast packets a Foundry device forwards each second using the procedures in
this section. You can configure limits on individual ports or groups of ports.
On the FESX, FWSX, and FSX, unknown unicast limiting is independent of broadcast and multicast limiting.
When you configure unknown-unicast limiting, the rate applies to all ports in the port range for which unknown
unicast is enabled. On the FESX, FWSX, and FSX, a 1-Gigabit port range consists of 12 ports. For example, the
FESX424 has 2 port ranges; ports 1 – 12 are one port range, and ports 13 – 24 are another port range. If you
enable unknown unicast limiting on port 2, the configuration applies to the ports from 1 – 12 that have unknown
unicast limiting enabled. 10-Gigabit ports are not grouped into ranges. So if your device has two 10-Gigabit
uplinks, you can configure different unknown-unicast limits for each 10-Gigabit port.
Command Syntax
To enable broadcast limiting on a group of ports, enter commands such as the following:
FESX424 Switch(config)# interface ethernet 1 to 8
FESX424 Switch(config-mif-e1000-1-8)# broadcast limit 65536
These commands configure broadcast limiting on ports 1 – 8. On each port, the total combined number of
broadcasts cannot exceed 65,536.
To include multicasts in the 65536 packets per second limit on each of the ports, enter the following command
after enabling broadcast limiting:
FESX424 Switch(config-mif-e1000-1-8)# multicast limit
To enable unknown unicast limiting, enter commands such as the following:
FESX424 Switch# config terminal
FESX424 Switch(config)# int e 1
FESX424 Switch(config-if-e1000-1)# unknown unicast limit 65536
The combined number of inbound Unknown Unicast packets permitted
for ports 1 to 12 is now set to 65536
FESX424 Switch((config-if-e1000-1)#
Syntax: [no] broadcast limit <num>
Syntax: [no] multicast limit
Syntax: [no]unknown unicast limit <num>
The <num> parameter specifies the maximum number of packets per second and can be any number that is a
multiple of 65536, up to a maximum value of 4294967295. If you enter the multicast limit command, multicast
packets are included in the limit you specify. If you specify 0, limiting is disabled. If you specify a number that is
not a multiple of 65536, the software rounds the number to the next multiple of 65536. Limiting is disabled by
default.
Configuring CLI Banners
Foundry devices can be configured to display a greeting message on users’ terminals when they enter the
Privileged EXEC CLI level or access the device through Telnet. In addition, a Foundry device can display a
message on the Console when an incoming Telnet CLI session is detected.
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