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Configuring ARP

About ARP

ARP message format

ARP operating mechanism

ARP entry types

ARP tasks at a glance

Configuring a static ARP entry

Configuring a short static ARP entry

Configuring a long static ARP entry

Configuring a multiport ARP entry

Configuring features for dynamic ARP entries

Setting the dynamic ARP learning limit for a device

Setting the dynamic ARP learning limit for an interface

Setting the aging timer for dynamic ARP entries

Enabling dynamic ARP entry check

Performing ARP entry synchronization

Configuring a customer-side or network-side port

Enabling ARP logging

Configuring gratuitous ARP

About gratuitous ARP

IP conflict detection

Gratuitous ARP packet learning

Periodic sending of gratuitous ARP packets

Gratuitous ARP tasks at a glance

Enabling IP conflict notification

Enabling gratuitous ARP packet learning

Enabling periodic sending of gratuitous ARP packets

Enabling sending gratuitous ARP packets for ARP requests with sender IP address on a different subnet

Configuring gratuitous ARP packet retransmission for the device MAC address change

Configuring proxy ARP

About proxy ARP

Enabling common proxy ARP

Enabling local proxy ARP

Display and maintenance commands for proxy ARP

Common proxy ARP configuration example

Example: Configuring common proxy ARP

Configuring ARP snooping

About ARP snooping

Creation of ARP snooping entries

Aging of ARP snooping entries

Protection for ARP snooping

Enabling ARP snooping

Display and maintenance commands for ARP snooping

Configuring ARP fast-reply

About ARP fast-reply

Enabling ARP fast-reply

ARP fast-reply configuration example

Example: Configuring ARP fast-reply

Configuring ARP direct route advertisement

About ARP direct route advertisement

Mechanism of ARP direct route advertisement

Cooperation with BGP

Enabling ARP direct route advertisement

Configuring IP addressing

About IP addressing

IP address representation and classes

Special IP addresses

Subnetting and masking

IP address assignment

Assigning an IP address to an interface

Configuring IP unnumbered

Display and maintenance commands for IP addressing

IP addressing configuration examples

Example: Manually specifying an IP address

DHCP overview

DHCP network model

DHCP address allocation

Allocation mechanisms

IP address allocation process

IP address lease extension

DHCP message format

DHCP options

Common DHCP options

Custom DHCP options

Vendor-specific option (Option 43)

Relay agent option (Option 82)

Option 184

Protocols and standards

Configuring the DHCP server

About DHCP server

DHCP address assignment mechanisms

Principles for selecting an address pool

IP address allocation sequence

DHCP server tasks at a glance

Creating a DHCP user class

Configuring an address pool on the DHCP server

DHCP address pool tasks at a glance

Creating a DHCP address pool

Specifying a primary subnet and multiple address ranges in a DHCP address pool

Specifying a primary subnet and multiple secondary subnets in a DHCP address pool

Configuring a static binding in a DHCP address pool

Specifying gateways for DHCP clients

Specifying a domain name suffix for DHCP clients

Specifying DNS servers for DHCP clients

Specifying WINS servers and NetBIOS node type for DHCP clients

Specifying BIMS server for DHCP clients

Specifying the configuration file for DHCP client automatic configuration

Specifying a server for DHCP clients

Configuring Option 184 parameters for DHCP clients

Customizing DHCP options

Applying a DHCP address pool to a VPN instance

Configuring the DHCP user class whitelist

Applying an address pool to an interface

Configuring a DHCP policy for dynamic assignment

Enabling DHCP

Enabling the DHCP server on an interface

Configuring IP address conflict detection

Enabling handling of Option 82

Configuring the DHCP server security features

Restrictions and guidelines

Configuring DHCP starvation attack protection

Configuring DHCP server compatibility

Configuring the DHCP server to always broadcast responses

Configuring the DHCP server to ignore BOOTP requests

Configuring the DHCP server to send BOOTP responses in RFC 1048 format

Setting the DSCP value for DHCP packets sent by the DHCP server

Configuring DHCP binding auto backup

Enabling client offline detection on the DHCP server

Configuring address pool usage alarming

Enabling DHCP logging on the DHCP server

Display and maintenance commands for DHCP server

DHCP server configuration examples

Example: Configuring static IP address assignment

Example: Configuring dynamic IP address assignment

Example: Configuring DHCP user class

Example: Configuring DHCP user class whitelist

Example: Configuring primary and secondary subnets

Example: Customizing DHCP option

Troubleshooting DHCP server configuration

Failure to obtain a non-conflicting IP address

Configuring the DHCP relay agent

About DHCP relay agent

DHCP relay agent operation

DHCP relay agent support for Option 82

DHCP relay agent support for MCE

DHCP relay agent tasks at a glance

Enabling DHCP

Enabling the DHCP relay agent on an interface

Specifying DHCP servers

Specifying DHCP servers on a relay agent

Configuring a DHCP address pool on a DHCP relay agent

Specifying the DHCP server selecting algorithm

Configuring the DHCP relay agent security features

Enabling the DHCP relay agent to record relay entries

Enabling periodic refresh of dynamic relay entries

Enabling DHCP starvation attack protection

Enabling DHCP server proxy on the DHCP relay agent

Enabling client offline detection on the DHCP relay agent

Configuring the DHCP relay agent to release an IP address

Configuring DHCP relay agent support for Option 82

Setting the DSCP value for DHCP packets sent by the DHCP relay agent

Specifying the DHCP relay agent address for the giaddr field

Manually specifying the DHCP relay agent address for the giaddr field

Configuring smart relay to specify the DHCP relay agent address for the giaddr field

Specifying the source IP address for relayed DHCP requests

Discarding DHCP requests that are delivered from VXLAN tunnels

Display and maintenance commands for DHCP relay agent

DHCP relay agent configuration examples

Example: Configuring basic DHCP relay agent

Example: Configuring Option 82

Example: Configuring DHCP server selection

Troubleshooting DHCP relay agent configuration

Failure of DHCP clients to obtain configuration parameters through the DHCP relay agent

Configuring the DHCP client

About DHCP client

Restrictions and guidelines: DHCP client configuration

DHCP client tasks at a glance

Enabling the DHCP client on an interface

Configuring a DHCP client ID for an interface

Enabling duplicated address detection

Setting the DSCP value for DHCP packets sent by the DHCP client

Display and maintenance commands for DHCP client

DHCP client configuration examples

Example: Configuring DHCP client

Configuring DHCP snooping

About DHCP snooping

Application of trusted and untrusted ports

DHCP snooping support for Option 82

Restrictions and guidelines: DHCP snooping configuration

DHCP snooping tasks at a glance

Configuring basic DHCP snooping features

Configuring basic DHCP snooping features in a common network

Configuring basic DHCP snooping features in a VXLAN network

Configuring DHCP snooping support for Option 82

Configuring DHCP snooping entry auto backup

Setting the maximum number of DHCP snooping entries

Configuring DHCP packet rate limit

Configuring DHCP snooping security features

Enabling DHCP starvation attack protection

Enabling DHCP-REQUEST attack protection

Configuring a DHCP packet blocking port

Enabling DHCP snooping logging

Disabling DHCP snooping on an interface

Display and maintenance commands for DHCP snooping

DHCP snooping configuration examples

Example: Configuring basic DHCP snooping features globally

Example: Configuring basic DHCP snooping features for a VLAN

Example: Configuring DHCP snooping support for Option 82

Configuring the BOOTP client

About BOOTP client

BOOTP client application

Obtaining an IP address dynamically

Protocols and standards

Configuring an interface to use BOOTP for IP address acquisition

Display and maintenance commands for BOOTP client

BOOTP client configuration examples

Example: Configuring BOOTP client

Configuring DNS

About DNS

Types of DNS services

Static domain name resolution

Dynamic domain name resolution

DNS proxy

DNS spoofing

DNS tasks at a glance

Configuring the DNS client

Configuring static domain name resolution

Configuring dynamic domain name resolution

Configuring the DNS proxy

Configuring DNS spoofing

Specifying the source interface for DNS packets

Configuring the DNS trusted interface

Setting the DSCP value for outgoing DNS packets

Display and maintenance commands for DNS

IPv4 DNS configuration examples

Example: Configuring static domain name resolution

Example: Configuring dynamic domain name resolution

Example: Configuring DNS proxy

IPv6 DNS configuration examples

Example: Configuring static domain name resolution

Example: Configuring dynamic domain name resolution

Example: Configuring DNS proxy

Troubleshooting DNS configuration

Failure to resolve IPv4 addresses

Failure to resolve IPv6 addresses

Configuring DDNS

About DDNS

Restrictions and guidelines: DDNS configuration

DDNS client tasks at a glance

Configuring a DDNS policy

Applying the DDNS policy to an interface

Setting the DSCP value for outgoing DDNS packets

Display and maintenance commands for DDNS

DDNS configuration examples

Example: Configuring DDNS with www.3322.org

Example: Configuring DDNS with PeanutHull server

Configuring IP forwarding basic settings

About FIB table

Saving the IP forwarding entries to a file

Display and maintenance commands for FIB table

Configuring load sharing

About load sharing

Configuring load sharing mode

Enabling IPv4 bandwidth-based load sharing

Enabling local-first load sharing

Enabling symmetric load sharing

Display and maintenance commands for load sharing

Loading sharing configuration examples

Example: Configuring load sharing based on source and destination addresses

Configuring fast forwarding

About fast forwarding

Restrictions and guidelines: Fast forwarding configuration

Configuring the aging time for fast forwarding entries

Configuring fast forwarding load sharing

Display and maintenance commands for fast forwarding

Displaying the adjacency table

About the adjacency table

Display and maintenance commands for adjacency table

Configuring IRDP

About IRDP

IRDP operation

Protocols and standards

IRDP tasks at a glance

Restrictions and guidelines: IRDP configuration

Enabling IRDP

Specifying the preference of advertised IP addresses

Setting the lifetime of advertised IP addresses

Setting the advertising intervals

Specifying the multicast address as the destination address for RAs

Specifying a proxy-advertised IP address

IRDP configuration examples

Example: Configuring IRDP

Optimizing IP performance

IP performance optimization tasks at a glance

Enabling an interface to forward directed broadcasts destined for the directly connected network

About forwarding broadcasts destined for the directly connected network

Procedure

Example: Enabling an interface to forward directed broadcasts destined for the directly connected network

Setting the MTU of IPv4 packets sent over an interface

Enabling IPv4 local fragment reassembly

Enabling sending ICMP error messages

About sending ICMP error messages

Enabling sending ICMP redirect messages

Enabling sending ICMP time exceeded messages

Enable sending ICMP destination unreachable messages

Configuring rate limit for ICMP error messages

Disabling forwarding ICMP fragments

Specifying the source address for ICMP packets

Setting TCP MSS for an interface

Configuring TCP path MTU discovery

Enabling SYN Cookie

Setting the TCP buffer size

Setting TCP timers

Display and maintenance commands for IP performance optimization

Configuring UDP helper

About UDP helper

Configuring UDP helper to convert broadcast to unicast

Configuring UDP helper to convert broadcast to multicast

Display and maintenance commands for UDP helper

UDP helper configuration examples

Example: Configuring UDP helper to convert broadcast to unicast

Example: Configuring UDP helper to convert broadcast to multicast

Configuring basic IPv6 settings

About IPv6

IPv6 features

IPv6 addresses

IPv6 path MTU discovery

IPv6 transition technologies

Protocols and standards

IPv6 basics tasks at a glance

Configuring an IPv6 global unicast address

About IPv6 global unicast address

Generating an EUI-64 IPv6 address

Manually assigning an IPv6 global unicast address

Stateless address autoconfiguration

Configuring prefix-specific address autoconfiguration

Configuring an IPv6 link-local address

About IPv6 link-local address

Restrictions and guidelines

Configuring automatic generation of an IPv6 link-local address for an interface

Manually assigning an IPv6 link-local address to an interface

Configuring an IPv6 anycast address

Configuring path MTU discovery

Setting the interface MTU

Setting a static path MTU for an IPv6 address

Setting the aging time for dynamic path MTUs

Controlling sending ICMPv6 messages

Configuring the rate limit for ICMPv6 error messages

Enabling replying to multicast echo requests

Enabling sending ICMPv6 destination unreachable messages

Enabling sending ICMPv6 time exceeded messages

Enabling sending ICMPv6 redirect messages

Specifying the source address for ICMPv6 packets

Enabling IPv6 local fragment reassembly

Configuring IPv6 bandwidth-based load sharing

Display and maintenance commands for IPv6 basics

Basic IPv6 settings configuration examples

Example: Configuring basic IPv6 settings

Configuring IPv6 neighbor discovery

About IPv6 neighbor discovery

ICMPv6 messages used by IPv6 neighbor discovery

Address resolution

Neighbor reachability detection

Duplicate address detection

Router/prefix discovery and stateless address autoconfiguration

Redirection

Protocols and standards

IPv6 neighbor discovery tasks at a glance

Configuring a static neighbor entry

Setting the dynamic neighbor learning limit on an interface

Setting the aging timer for ND entries in stale state

Minimizing link-local ND entries

Setting the hop limit

Configuring RA message sending and parameters

About RA message parameters

Restrictions and guidelines

Enabling the sending of RA messages

Configuring parameters for RA messages

Setting the maximum number of attempts to send an NS message for DAD

Enabling ND proxy

About ND proxy

Enabling common ND proxy

Enabling local ND proxy

Configuring a customer-side or a network-side port

Display and maintenance commands for IPv6 ND

DHCPv6 overview

DHCPv6 address/prefix assignment

Rapid assignment involving two messages

Assignment involving four messages

Address/prefix lease renewal

Stateless DHCPv6

DHCPv6 options

Option 18

Option 37

Protocols and standards

Configuring the DHCPv6 server

About DHCPv6 server

IPv6 address assignment

IPv6 prefix assignment

Concepts

DHCPv6 address pool

IPv6 address/prefix allocation sequence

DHCPv6 server tasks at a glance

Configuring IPv6 prefix assignment

Configuring IPv6 address assignment

Configuring network parameters assignment

About network parameters assignment

Configuring network parameters in a DHCPv6 address pool

Configuring network parameters in a DHCPv6 option group

Configuring the DHCPv6 server on an interface

Configuring a DHCPv6 policy for IPv6 address and prefix assignment

Setting the DSCP value for DHCPv6 packets sent by the DHCPv6 server

Configuring DHCPv6 binding auto backup

Enabling the DHCPv6 server to advertise IPv6 prefixes

Applying a DHCPv6 address pool to a VPN instance

Enabling DHCPv6 logging on the DHCPv6 server

Display and maintenance commands for DHCPv6 server

DHCPv6 server configuration examples

Example: Configuring dynamic IPv6 prefix assignment

Example: Configuring dynamic IPv6 address assignment

Configuring the DHCPv6 relay agent

About DHCPv6 relay agent

Typical application

DHCPv6 relay agent operating process

DHCPv6 relay agent tasks at a glance

Enabling the DHCPv6 relay agent on an interface

Specifying DHCPv6 servers on the relay agent

Specifying DHCPv6 server IP addresses

Specifying DHCPv6 servers for a DHCPv6 address pool on the DHCPv6 relay agent

Specifying a gateway address for DHCPv6 clients

Setting the DSCP value for DHCPv6 packets sent by the DHCPv6 relay agent

Specifying a padding mode for the Interface-ID option

Enabling the DHCPv6 relay agent to advertise IPv6 prefixes

Specifying the source IPv6 address for relayed DHCPv6 requests

Configuring DHCPv6 relay security features

Enabling the DHCPv6 relay agent to record relay entries

Enabling IPv6 release notification

Enabling client offline detection

Discarding DHCPv6 requests that are delivered from VXLAN tunnels

Display and maintenance commands for DHCPv6 relay agent

DHCPv6 relay agent configuration examples

Example: Configuring DHCPv6 relay agent

Configuring the DHCPv6 client

About the DHCPv6 client

Restrictions and guidelines: DHCPv6 client configuration

DHCPv6 client tasks at a glance

Configuring the DHCPv6 client DUID

Configuring IPv6 address acquisition

Configuring IPv6 prefix acquisition

Configuring IPv6 address and prefix acquisition

Configuring acquisition of configuration parameters except IP addresses and prefixes

Setting the DSCP value for DHCPv6 packets sent by the DHCPv6 client

Display and maintenance commands for DHCPv6 client

DHCPv6 client configuration examples

Example: Configuring IPv6 address acquisition

Example: Configuring IPv6 prefix acquisition

Example: Configuring IPv6 address and prefix acquisition

Example: Configuring stateless DHCPv6

Configuring DHCPv6 snooping

About DHCPv6 snooping

Application of trusted and untrusted ports

Restrictions and guidelines: DHCPv6 snooping configuration

DHCPv6 snooping tasks at a glance

Configuring basic DHCPv6 snooping features

Configuring basic DHCPv6 snooping features in a common network

Configuring DHCP snooping support for Option 18

Configuring DHCP snooping support for Option 37

Configuring DHCPv6 snooping entry auto backup

Setting the maximum number of DHCPv6 snooping entries

Configuring DHCPv6 packet rate limit

Enabling DHCPv6-REQUEST check

Configuring a DHCPv6 packet blocking port

Enabling DHCPv6 snooping logging

Display and maintenance commands for DHCPv6 snooping

DHCPv6 snooping configuration examples

Example: Configuring DHCPv6 snooping

Configuring IPv6 fast forwarding

About IPv6 fast forwarding

Configuring the aging time for IPv6 fast forwarding entries

Configuring IPv6 fast forwarding load sharing

Display and maintenance commands for IPv6 fast forwarding

Configuring tunneling

About tunneling

Supported tunneling technologies

Restrictions and guidelines: Tunnel interface configuration

Prerequisites for tunnel configuration

Configuring a tunnel interface

About tunnel interface configuration

Tunnel interface configuration tasks at a glance

Creating a tunnel interface

Specifying traffic processing slots for the tunnel interface

Configuring parameters for tunneled packets

Specifying the tunnel destination VPN instance

Restoring the default settings of the tunnel interface

Adding TUNNEL to the PHY_UPDOWN log mnemonic for tunnel interfaces

Display and maintenance commands for tunnel interface configuration

Troubleshooting tunnel interface configuration

Tunnel interface not up

IPv6 over IPv4 tunneling

About IPv6 over IPv4 tunneling

Implementation

IPv6 over IPv4 tunneling tasks at a glance

Configuring an IPv6 over IPv4 tunnel

Restrictions and guidelines

Procedure

Example: Configuring an IPv6 over IPv4 tunnel

Enabling dropping IPv6 packets that use IPv4-compatible IPv6 addresses

IPv4 over IPv4 tunneling

About IPv4 over IPv4 tunneling

Restrictions and guidelines: IPv4 over IPv4 tunnel configuration

Configuring an IPv4 over IPv4 tunnel

IPv4 over IPv4 tunnel configuration examples

Example: Configuring an IPv4 over IPv4 tunnel

Configuring GRE

About GRE

GRE encapsulation format

GRE tunnel operating principle

GRE application scenarios

Protocols and standards

Restrictions and guidelines: GRE configuration

Prerequisites for GRE

Configuring a GRE/IPv4 tunnel

Enabling dropping IPv6 packets that use IPv4-compatible IPv6 addresses

Display and maintenance commands for GRE

GRE configuration examples

Example: Configuring an IPv4 over IPv4 GRE tunnel

Troubleshooting GRE

Hosts at both ends of a GRE tunnel cannot ping each other

Document conventions and icons

Conventions

Network topology icons

Support and other resources

Accessing Hewlett Packard Enterprise Support

Accessing updates

Websites

Customer self repair

Remote support

Documentation feedback