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Dell Force10 S50-01-GE-48T FTOS 8.4.2.6 Command Line Reference Guide for the E - Page 630

ip udp-helper udp-port, show ip udp-helper

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www.dell.com | support.dell.com Usage Information When a UDP broadcast packet is flooded out of an interface, and the outgoing interface is configured using this command, the outgoing packet's IP destination address is replaced with the configured broadcast address. Related Commands debug ip udp-helper show ip udp-helper Enable debug and display the debug information on a console. Display the configured UDP helper(s) on all interfaces. ip udp-helper udp-port e Enable the UDP broadcast feature on an interface either for all UDP ports or a specified list of UDP ports. Syntax ip udp-helper udp-port [udp-port-list] To disable the UDP broadcast on a port, use the no ip udp-helper udp-port [udp-port-list] command. Parameters udp-port-list (OPTIONAL) Enter up to 16 comma separated UDP port numbers. Note: If this option is not used, all UDP Ports are considered by default. Defaults No default behavior or values Command Modes INTERFACE (config-if) Usage Information If the ip helper-address command and ip udp-helper udp-port command are configured, the behavior is that the UDP broadcast traffic with port numbers 67/68 will be unicast relayed to the DHCP server per the ip helper-address configuration. This will occur regardless if the ip udp-helper udp-port command contains port numbers 67/68 or not. If only the ip udp-helper udp-port command is configured, all the UDP broadcast traffic is flooded, including ports 67/68 traffic if those ports are part of the udp-port-list. Related Commands ip helper-address debug ip udp-helper show ip udp-helper Configure the destination broadcast or host address for DHCP server. Enable debug and display the debug information on a console. Display the configured UDP helper(s) on all interfaces. show ip udp-helper e Display the configured UDP helper(s) on all interfaces. Syntax show ip udp-helper Defaults No default configuration or values Command Modes EXEC 630 | Interfaces

Section	Page
Preface	13
About this Guide	13
Objectives	13
Audience	13
Conventions	13
Information Symbols	14
Related Documents	14
CLI Basics	15
Accessing the Command Line	15
Multiple Configuration Users	16
Navigating the Command Line Interface	16
Obtaining Help	17
Using the Keyword No	19
Filtering show Commands	19
Displaying All Output	20
Filtering Command Output Multiple Times	20
Command Modes	20
EXEC Mode	21
EXEC Privilege Mode	21
CONFIGURATION Mode	21
INTERFACE Mode	21
LINE Mode	22
TRACE-LIST Mode	22
MAC ACCESS LIST Mode	22
IP ACCESS LIST Mode	23
ROUTE-MAP Mode	23
PREFIX-LIST Mode	23
AS-PATH ACL Mode	23
IP COMMUNITY LIST Mode	24
REDIRECT-LIST Mode	24
SPANNING TREE Mode	24
Per-VLAN SPANNING TREE Plus Mode	24
RAPID SPANNING TREE Mode	25
MULTIPLE SPANNING TREE Mode	25
PROTOCOL GVRP Mode	25
ROUTER OSPF Mode	25
ROUTER RIP Mode	26
ROUTER ISIS Mode	26
ROUTER BGP Mode	26
Determining the Chassis Mode	26
File Management	27
Overview	27
Basic File Management Commands	27
Upgrading the C-Series FPGA	56
BOOT_USER Mode	59
Overview	59
Commands	59
Control and Monitoring	73
Overview	73
Commands	73
802.1ag	159
Overview	159
Commands	159
802.3ah	171
Overview	171
Commands	171
802.1X	183
Important Points to Remember	183
Access Control Lists (ACL)	199
Overview	199
Commands Common to all ACL Types	199
Common IP ACL Commands	201
Standard IP ACL Commands	205
Extended IP ACL Commands	212
Common MAC Access List Commands	243
Standard MAC ACL Commands	246
Extended MAC ACL Commands	251
IP Prefix List Commands	256
Route Map Commands	262
AS-Path Commands	279
IP Community List Commands	282
ACL VLAN Group	287
Overview	287
Commands	287
Bidirectional Forwarding Detection (BFD)	293
Overview	293
Commands	293
Border Gateway Protocol IPv4 (BGPv4)	307
Overview	307
BGPv4 Commands	307
MBGP Commands	384
BGP Extended Communities (RFC 4360)	411
Content Addressable Memory (CAM) for ExaScale	421
Overview	421
Commands	421
Important Points to Remember	422
Content Addressable Memory (CAM)	429
Overview	429
CAM Profile Commands	429
Important Points to Remember	430
CAM IPv4flow Commands	441
CAM Layer 2 ACL Commands	444
Configuration Rollback	447
Overview	447
Commands	447
Dynamic Host Configuration Protocol (DHCP)	457
Overview	457
Commands to Configure the System to be a DHCP Server	457
Commands to Configure Secure DHCP	465
Equal Cost Multi-Path	473
Overview	473
Commands	473
Far-End Failure Detection (FEFD)	479
Overview	479
Commands	479
Force10 Resilient Ring Protocol (FRRP)	485
Overview	485
Commands	485
Important Points to Remember	485
Force10 Service Agent	493
Overview	493
Commands	493
GARP VLAN Registration (GVRP)	525
Overview	525
Commands	525
Important Points to Remember	526
High Availability (HA)	535
Overview	535
Commands	535
Internet Group Management Protocol (IGMP)	545
Overview	545
IGMP Commands	545
Important Points to Remember	545
IGMP Snooping Commands	555
Important Points to Remember for IGMP Snooping	555
Important Points to Remember for IGMP Querier	556
Interfaces	561
Overview	561
Basic Interface Commands	561
Port Channel Commands	617
Time Domain Reflectometer (TDR)	626
Important Points to Remember	627
UDP Broadcast	628
Important Points to Remember	628
IPv4 Routing	633
Overview	633
Commands	633
IPv6 Access Control Lists (IPv6 ACLs)	685
Overview	685
Important Points to Remember	685
IPv6 ACL Commands	686
IPv6 Route Map Commands	712
IPv6 Basics	717
Overview	717
Commands	717
IPv6 Border Gateway Protocol (IPv6 BGP)	735
Overview	735
IPv6 BGP Commands	735
IPv6 MBGP Commands	797
Intermediate System to Intermediate System (IS-IS)	821
Overview	821
Commands	821
Link Aggregation Control Protocol (LACP)	863
Overview	863
Commands	863
Layer 2	869
Overview	869
MAC Addressing Commands	869
Virtual LAN (VLAN) Commands	889
Link Layer Detection Protocol (LLDP)	899
Overview	899
Commands	899
LLDP-MED Commands	908
Multicast Listener Discovery (MLD)	917
Overview	917
MLD Commands	917
MLD Snooping Commands	924
Multicast Source Discovery Protocol (MSDP)	929
Overview	929
Commands	929
Multiple Spanning Tree Protocol (MSTP)	939
Overview	939
Commands	939
Multicast	955
Overview	955
IPv4 Multicast Commands	955
IPv6 Multicast Commands	972
Neighbor Discovery Protocol (NDP)	979
Overview	979
Commands	979
Object Tracking	987
Overview	987
IPv4 Object Tracking Commands	987
IPv6 Object Tracking Commands	1001
Open Shortest Path First (OSPFv2 and OSPFv3)	1007
Overview	1007
OSPFv2 Commands	1007
OSPFv3 Commands	1065
Policy-based Routing (PBR)	1087
Overview	1087
Commands	1087
PIM-Dense Mode (PIM-DM)	1097
Overview	1097
IPv4 PIM-Dense Mode Commands	1097
PIM-Sparse Mode (PIM-SM)	1099
Overview	1099
IPv4 PIM-Sparse Mode Commands	1099
IPv6 PIM-Sparse Mode Commands	1122
PIM-Source Specific Mode (PIM-SSM)	1133
Overview	1133
IPv4 PIM Commands	1133
IPv4 PIM-Source Specific Mode Commands	1133
IPv6 PIM Commands	1135
IPv6 PIM-Source Specific Mode Commands	1135
Power over Ethernet (PoE)	1137
Overview	1137
Commands	1137
Port Monitoring	1143
Overview	1143
Commands	1143
Important Points to Remember	1144
Private VLAN (PVLAN)	1157
Overview	1157
Commands	1157
Private VLAN Concepts	1157
Per-VLAN Spanning Tree plus (PVST+)	1167
Overview	1167
Commands	1167
Quality of Service (QoS)	1181
Overview	1181
Global Configuration Commands	1181
Per-Port QoS Commands	1182
Policy-Based QoS Commands	1190
Important Points to Remember—multicast-bandwidth option	1203
Queue-Level Debugging	1226
Router Information Protocol (RIP)	1237
Overview	1237
Commands	1237
Remote Monitoring (RMON)	1255
Overview	1255
Commands	1255
Rapid Spanning Tree Protocol (RSTP)	1267
Overview	1267
Commands	1267
Security	1279
Overview	1279
Commands	1279
AAA Accounting Commands	1279
Authorization and Privilege Commands	1282
Authentication and Password Commands	1286
RADIUS Commands	1297
TACACS+ Commands	1302
Port Authentication (802.1X) Commands	1305
Important Points to Remember	1305
SSH Server and SCP Commands	1312
Trace List Commands	1324
Secure DHCP Commands	1334
Service Provider Bridging	1339
Overview	1339
Commands	1339
Important Points to Remember	1339
sFlow	1345
Overview	1345
Important Points to Remember	1345
Commands	1346
SNMP and Syslog	1357
Overview	1357
SNMP Commands	1357
Important Points to Remember	1358
Syslog Commands	1373
SONET	1385
Overview	1385
Commands	1385
S-Series Stacking Commands	1403
Overview	1403
Commands	1403
Storm Control	1411
Overview	1411
Commands	1411
Important Points to Remember	1411
Spanning Tree Protocol (STP)	1419
Overview	1419
Commands	1419
Time and Network Time Protocol (NTP)	1431
Overview	1431
Commands	1431
Uplink Failure Detection (UFD)	1447
Overview	1447
Commands	1447
VLAN Stacking	1457
Overview	1457
Commands	1457
Important Points to Remember	1457
Virtual Routing and Forwarding (VRF)	1467
Overview	1467
Commands	1467
Virtual Router Redundancy Protocol (VRRP)	1477
Overview	1477
IPv4 VRRP Commands	1477
IPv6 VRRP Commands	1491
C-Series Diagnostics and Debugging	1497
Overview	1497
Inter-process Communication Commands	1497
RPM Management Port Commands	1503
Data Path Debugging Commands	1505
Interface Troubleshooting Commands	1508
Advanced ASIC Debugging Commands	1512
ACL and System-Flow Debug Commands	1516
Interface Management Debug Commands	1518
Layer 2 Debug Command	1520
Trace Logging Commands	1521
Offline Diagnostic Commands	1527
PoE Hardware Status Commands	1529
Buffer Tuning Commands	1530
E-Series ExaScale Debugging and Diagnostics	1537
Overview	1537
Diagnostics and Monitoring Commands	1537
Important Points to Remember	1538
Offline Diagnostic Commands	1555
Hardware Commands	1558
E-Series Debugging and Diagnostics	1581
Overview	1581
Diagnostics and Monitoring Commands	1581
Important Points to Remember	1582
Offline Diagnostic Commands	1602
Hardware Commands	1604
S-Series Debugging and Diagnostics	1621
Offline Diagnostic Commands	1621
Important Points to Remember	1621
Buffer Tuning Commands	1623
Hardware Commands	1628
ICMP Message Types	1639
SNMP Traps	1641
Index	1645