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DES-7200 Configuration Guide Chapter 6 UDP-Helper Configuration
6-6
vlan 10
!
ip forward-protocol udp 1000
!
interface VLAN 10
no ip proxy-arp
ip helper-address 30.1.1.2
ip address 10.1.1.1 255.255.255.0
!
interface VLAN 20
no ip proxy-arp
ip address 20.1.1.1 255.255.255.0
!
¾ Verify whether relay forwarding has taken effect.
Step 1: Send UDP broadcast packets carrying the destination port number of
999
PC1 sends a UDP broadcast packet with the following format:
Src_mac:0000.0000.0001
Dst_mac:0xFFFFFFFFFFFF
Src_ip:1.0.0.3
Dst_ip:255.255.255.255
Dst_port:999
PC2 acts as UDP-Helper server. Such packet is not received on PC2.
Step 2: Send UDP broadcast packets carrying the destination port number of
1000.
PC1 sends a UDP broadcast packet with the following format:
Src_mac:0000.0000.0001
Dst_mac:0xFFFFFFFFFFFF
Src_ip:1.0.0.3
Dst_ip:255.255.255.255
Dst_port:1000
PC2 acts as UDP-Helper server. Such packet is received on PC2. The
destination IP address of packet is 30.1.1.2, and the data contained are the
same as the packets sent.
Step 3: Send UDP broadcast packets with destination port number being 69, 53,
37, 137, 138 or 49.
PC1 sends a UDP broadcast packet with the following format (taking destination
port number of 69 as the example):