IPv6 Service Configuration Guide

introduction introduction internet protocol version 6 (ipv6), also called ip next generation (ipng), is a second generation network layer protocol and an upgraded version of internet protocol version 4 (ipv4) it is designed by the internet engineering task force (ietf) configure the ipv6 address of the interface configure the ipv6 address of the interface table 1 configure ipv6 address of the interface table 1 configure ipv6 address of the interface purpose commands description enter global configuration view configure terminal create interface configuration view interface { ethernet interface name \[ subinterface number ] | link aggregation lag id \[ subinterface number ] | vlan vlan id | loopback loopback id | mgmt 0} configure an ipv6 address of the interface ip address a b/m ipv6 address with subnet mask /127 or /128 is not allowed to be configured in other subnet masks, addresses with the host portion all zeros are not allowed, but all ones are allowed note for the ethernet ports, lagifs and vlanifs, the ipv6 use link local attribute will be enabled automatically after configuring an ipv6 address, that is, the ipv6 link local address will be generated automatically enable auto generation of ipv6 link local address for interfaces enable auto generation of ipv6 link local address for interfaces ipv6 link local addresses are commonly used for neighbor discovery protocols and stateless autoconfiguration there are two ways to generate auto generation the device automatically generates a link local address for an interface based on the link local address prefix (fe80 /10) and the link layer address of the interface manual assignment users manually configure the ipv6 link local address via the method described in docid\ i967vuair8wnnecpvkicf it is recommended to use the auto generation method to avoid link local address conflicts table 2 enable auto generation of ipv6 link local address for interfaces table 2 enable auto generation of ipv6 link local address for interfaces purpose commands description enter global configuration view configure terminal create interface configuration view interface { ethernet interface name \[ subinterface number ] | link aggregation lag id \[ subinterface number ] | vlan vlan id } enable auto generation of ipv6 link local address ipv6 use link local display and maintenance display and maintenance table 3 ipv6 display and maintenance table 3 ipv6 display and maintenance purpose commands description display interfaces with ipv6 addresses show ipv6 interfaces typical configuration example typical configuration example configure slaac configure slaac networking requirements multiple hosts are connected to device a it is expected to configure an ipv6 address on the interface of device a, and notify to the hosts to obtain the ipv6 address in a stateful manner as well as other related configuration information topology procedure \#create a vlan, configure an ipv6 address, and add vlan member sonic# configure terminal sonic(config)# vlan 10 sonic(config vlan 10)# exit sonic(config)# interface vlan 10 sonic(config vlanif 10)# ip address 2001 1/64 sonic(config)# interface ethernet 0/0 sonic(config if 0/0)# switchport access vlan 10 \#enable ra advertisement, advertise ipv6 address prefixes, and set the m and o flag to 1 sonic(config)# radv enable please enter 'radv commit' to take effect sonic(config)# radv commit sonic(config)# interface vlan 10 sonic(config vlanif 10)# radv prefix 2001 /64 please enter 'radv commit' to take effect sonic(config vlanif 10)# radv managed flag please enter 'radv commit' to take effect sonic(config vlanif 10)# radv other config flag please enter 'radv commit' to take effect sonic(config vlanif 10)# radv commit verification \#display radv configuration on device a sonic# show radv enabled true global unicast only false + + + + + + + + + + + + \| interface | prefix | managed flag | otherconfig flag | offlink | no autonomous | link mtu | rdnss | route | preference | maxrtradvinterval | minrtradvinterval | +=============+===========+================+====================+===========+=================+============+=========+======================+=====================+=====================+ \| vlan10 | 2001 /64 | on | on | | | | | | | | + + + + + + + + + + + + \#the hosts can ping the gateway \#check nd neighbors on device a sonic# show ndp 2001 /64 address macaddress iface vlan status \ 2001 210 94ff\ fe00 1 00 10 94 00 00 01 0/4 10 reachable 2001 210 94ff\ fe00 2 00 10 94 00 00 02 0/4 10 reachable 2001 210 94ff\ fe00 3 00 10 94 00 00 03 0/4 10 reachable 2001 210 94ff\ fe00 4 00 10 94 00 00 04 0/4 10 reachable 2001 210 94ff\ fe00 5 00 10 94 00 00 05 0/4 10 reachable 2001 210 94ff\ fe00 6 00 10 94 00 00 06 0/4 10 reachable 2001 210 94ff\ fe00 7 00 10 94 00 00 07 0/4 10 reachable 2001 210 94ff\ fe00 8 00 10 94 00 00 08 0/4 10 reachable 2001 210 94ff\ fe00 9 00 10 94 00 00 09 0/4 10 reachable 2001 210 94ff\ fe00\ a 00 10 94 00 00 0a 0/4 10 reachable 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