Udp Helper; Configuring Udp Helper; Important Points To Remember; Enabling Udp Helper - Dell Force10 MXL Blade Configuration Manual

To view if ICMP unreachable messages are sent on the interface, use the
INTERFACE mode. If it is not listed in the
information is displayed in the

UDP Helper

UDP helper allows you to direct the forwarding IP/UDP broadcast traffic by creating special broadcast
addresses and rewriting the destination IP address of packets to match those addresses. Configurations
using this feature are described in

Configuring UDP Helper

Configuring FTOS to direct UDP broadcast is a two-step process:
1. Enable UDP helper and specify the UDP ports for which traffic is forwarded

Important Points to Remember

• The existing
same interface.
• The broadcast traffic rate must not exceed 200 packets per second when you enable UDP helper.
• You may specify a maximum of 16 UDP ports.
• UDP helper is compatible with IP helper (
• UDP broadcast traffic with port number 67 or 68 are unicast to the dynamic host configuration
protocol (DHCP) server per the
contains those ports.
• If the UDP port list contains ports 67 or 68, UDP broadcast traffic is forwarded on those ports.

Enabling UDP Helper

To enable UDP helper, use the
Figure 14-10. Enabling UDP Helper
FTOS(conf-if-te-1/1)#ip udp-helper udp-port 1000
FTOS(conf-if-te-1/1)#show config
!
interface TenGigabitEthernet 1/1
ip address 2.1.1.1/24
ip udp-helper udp-port 1000
no shutdown
To view the interfaces and ports on which UDP helper is enabled, use the
EXEC Privilege mode
272
| IPv4 Routing
show config
Configurations Using UDP
command is rendered meaningless if you enable UDP helper on the
ip directed broadcast
ip helper-address
ip udp-helper udp-ports
(Figure 14-11).
command output, it is enabled. Only non-default
show config
command output.
Helper.
):
ip helper-address
configuration whether or not the UDP port list
command (Figure
command in
show config
(Enabling UDP
14-10).
command from
show ip udp-helper
Helper).