Reference Guide

Disable duplicate address discovery
OS10(config)# interface ethernet 1/1/1
OS10(conf-if-eth1/1/1)# ipv6 nd dad disable
Disable IPv6 for duplicate link-local address
OS10(config)# interface ethernet 1/1/1
OS10(conf-if-eth1/1/1)# ipv6 nd dad disable-ipv6-on-dad-failure
Static IPv6 routing
To dene an explicit route between two IPv6 networking devices, congure a static route on an interface. Static routing is useful for smaller
networks with only one path to an outside network, or to provide security for certain trac types in a larger network.
• Enter the static routing information including the IPv6 address and mask in x:x:x:x::x format in CONFIGURATION mode—prex length
0 to 64.
ipv6 route ipv6–prefix/mask {next-hop | interface interface [route-preference]}
• next-hop — Enter the next-hop IPv6 address in x:x:x:x::x format.
• interface interface — Enter the interface type then the slot/port or number information.
• route-preference — (Optional) Enter a route-preference range—1 to 255.
After you congure a static IPv6 route, congure the forwarding router’s address on the interface. The IPv6 neighbor interface must have
an IPv6 address congured.
Congure IPv6 static routing and view conguration
OS10(config)# ipv6 route 2111:dddd:0eee::22/128 2001:db86:0fff::2
OS10(config)# do show ipv6 route static
Codes: C - connected
S - static
B - BGP, IN - internal BGP, EX - external BGP
O - OSPF,IA - OSPF inter area, N1 - OSPF NSSA external type 1,
N2 - OSPF NSSA external type 2, E1 - OSPF external type 1,
E2 - OSPF external type 2, > - non-active route
Gateway of last resort is not set
Destination Gateway Dist/Metric Last Change
--------------------------------------------------------------------------
S 2111:dddd:eee::22/12via 2001:db86:fff::2 ethernet1/1/1 1/1 00:01:24
IPv6 destination unreachable
By default, when no matching entry for an IPv6 route is found in the IPv6 routing table, a packet is dropped and no error message is sent.
You can enable the capability to send an IPv6 destination unreachable error message to the source without dropping the
packet.
Enable IPv6 unreachable destination messaging
OS10(config)# interface ethernet 1/1/8
OS10(conf-if-eth1/1/8)# ipv6 unreachables
Layer 3
317