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FTOS Configuration Guide for the C-Series - Force10 Networks

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Configuring a Broadcast Address<br />

Configure a broadcast address on an interface using <strong>the</strong> command ip udp-broadcast-address, as shown in<br />

Figure 218.<br />

Figure 218 Configuring a Broadcast Address<br />

<strong>Force10</strong>(conf-if-vl-100)#ip udp-broadcast-address 1.1.255.255<br />

<strong>Force10</strong>(conf-if-vl-100)#show config<br />

!<br />

interface Vlan 100<br />

ip address 1.1.0.1/24<br />

ip udp-broadcast-address 1.1.255.255<br />

untagged GigabitE<strong>the</strong>rnet 1/2<br />

no shutdown<br />

View <strong>the</strong> configured broadcast address <strong>for</strong> an interface using <strong>the</strong> command show interfaces, as shown in<br />

Figure 219.<br />

Figure 219 Configuring a Broadcast Address<br />

R1_E600(conf)#do show interfaces vlan 100<br />

Vlan 100 is up, line protocol is down<br />

Address is 00:01:e8:0d:b9:7a, Current address is 00:01:e8:0d:b9:7a<br />

Interface index is 1107787876<br />

Internet address is 1.1.0.1/24<br />

IP UDP-Broadcast address is 1.1.255.255<br />

MTU 1554 bytes, IP MTU 1500 bytes<br />

LineSpeed auto<br />

ARP type: ARPA, ARP Timeout 04:00:00<br />

Last clearing of "show interface" counters 00:07:44<br />

Queueing strategy: fifo<br />

Input Statistics:<br />

0 packets, 0 bytes<br />

Time since last interface status change: 00:07:44<br />

<strong>Configuration</strong>s Using UDP Helper<br />

When UDP helper is enabled and <strong>the</strong> destination IP address of an incoming packet is a broadcast address,<br />

<strong>FTOS</strong> suppresses <strong>the</strong> destination address of <strong>the</strong> packet. The following sections describe various<br />

configurations that employ UDP helper to direct broadcasts.<br />

• UDP Helper with Broadcast-all Addresses on page 328<br />

• UDP Helper with Subnet Broadcast Addresses on page 328<br />

• UDP Helper with Configured Broadcast Addresses on page 329<br />

• UDP Helper with No Configured Broadcast Addresses on page 330<br />

<strong>FTOS</strong> <strong>Configuration</strong> <strong>Guide</strong>, version 7.7.1.0 327

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