Enabling Sending Icmpv6 Redirect Messages; Displaying And Maintaining Ipv6 Basics - HP 5920 Series Configuration Manual

Step
1. Enter system view.
2. Enable sending ICMPv6 time
exceeded messages.

Enabling sending ICMPv6 redirect messages

Upon receiving a packet from a host, the device sends an ICMPv6 redirect message to inform a better
next hop to the host when the following conditions are satisfied:
• The interface receiving the packet is the interface forwarding the packet.
The selected route is not created or modified by any ICMPv6 redirect message.
•
The selected route is not a default route.
•
• The forwarded packet does not contain the routing extension header.
The ICMPv6 redirect function simplifies host management by enabling hosts that hold few routes to
gradually optimize their routing table. However, to avoid adding too many routes on hosts, this function
is disabled by default.
To enable sending ICMPv6 redirect messages:
Step
1. Enter system view.
2. Enable sending ICMPv6 redirect
messages.

Displaying and maintaining IPv6 basics

Execute display commands in any view and reset commands in user view.
Task
Display IPv6 FIB entries.
Display the IPv6 information for the
interface.
Display the IPv6 prefix information for the
interface.
Display neighbor information.
Display the total number of neighbor
entries.
Display the neighbor information for a
specific VPN.
Command
system-view
ipv6 hoplimit-expires enable
Command
system-view
ipv6 redirects enable
Command
display ipv6 fib [ vpn-instance vpn-instance-name ] [ ipv6-address
[ prefix-length ] ]
display ipv6 interface [ interface-type [ interface-number ] ] [ brief ]
display ipv6 interface interface-type interface-number prefix
display ipv6 neighbors { { ipv6-address | all | dynamic | static }
[ slot slot-number ] | interface interface-type interface-number |
vlan vlan-id } [ verbose ]
display ipv6 neighbors { { all | dynamic | static } [ slot
slot-number ] | interface interface-type interface-number | vlan
vlan-id } count
display ipv6 neighbors vpn-instance vpn-instance-name [ count ]
129
Remarks
N/A
The default setting is disabled.
Remarks
N/A
By default, sending ICMPv6
redirect messages is disabled.