Quick Reference Guide

PowerConnect B-Series TI24X Configuration Guide 77
53-1002269-02
Configuring IPv6 neighbor discovery
5
Disabling router advertisement and solicitation messages
Router advertisement and solicitation messages enable a node on a link to discover the routers on
the same link. By default, router advertisement and solicitation messages are permitted on the
device. To disable these messages, configure an IPv6 access control list that denies them. The
following shows an example configuration.
Example
PowerConnect(config)# ipv6 access-list rtradvert
PowerConnect(config)# deny icmp any any router-advertisement
PowerConnect(config)# deny icmp any any router-solicitation
PowerConnect(config)# permit ipv6 any any
IPv6 debug
The debug ipv6 commands enable the collection of information about IPv6 configurations for
troubleshooting.
Syntax: debug ipv6 address cache icmp mld nd packet ra
• address - IPv6 address
• cache - IPv6 cache entry
• icmp - ICMPv6
• nd - neighbor discovery
• packet - IPv6 packet
• ra - router add
Disabling IPv6 on a Layer 2 switch
IPv6 is enabled by default in the Layer 2 switch code. If desired, you can disable IPv6 on a global
basis on a device running the switch code. To do so, enter the following command at the Global
CONFIG level of the CLI.
PowerConnect(config)# no ipv6 enable
Syntax: no ipv6 enable
To re-enable IPv6 after it has been disabled, enter ipv6 enable.
NOTE
IPv6 is disabled by default in the router code and must be configured on each interface that will
support IPv6.
Configuring IPv6 neighbor discovery
The neighbor discovery feature for IPv6 uses IPv6 ICMP messages to do the following:
• Determine the link-layer address of a neighbor on the same link.
• Verify that a neighbor is reachable.
• Track neighbor routers.