L3 Switch 3560 IPv6 Autoconfig

satishtech

Trying to assign a Host an IPv6 IP address.
Not working, could anyone try it on real switches
and see if it works.

L3 Switch:
ipv6 unicast-routing
interface Vlan1
no ip address
ipv6 address 2000::1/64
ipv6 enable
shutdown

theodoxa

Try:

SW1# show sdm prefer

It needs to be using an IPv4 and IPv6 Dual Stack SDM Template.

SW1(config)# sdm prefer dual-ipv4-and-ipv6 default

SW1(config)# sdm prefer dual-ipv4-and-ipv6 routing

SW1(config)# sdm prefer dual-ipv4-and-ipv6 vlan

Default: Can Learn 2048 MAC Addresses, NO Policy Routing
Routing: Can Learn 1536 MAC Addresses, Supports Policy Routing
VLAN: Can Learn 8192 MAC Addresses, NO IPv4 or IPv6 Unicast Routing, NO Policy Routing

Basically, each SDM template partitions the hardware tables slightly differently. Default tries to balance Routing and Switching support, while Routing favors Layer 3 at the expense of Layer 2, and VLAN makes the switch essentially a Layer 2 Switch. Only the Routing Template supports Policy Routing. For a lab, all 3 templates support more than enough MAC Addresses, so I would go with the Routing template for full Layer 3 functionality.

[EDIT] You will need to save the configuration and reload the switch after changing the SDM Template in order for the new template to take effect.

koz24

He's using Packet Tracer so he won't be able to run those commands. I can try it later but I'm sure it'll work. PT seems to have limited IPV6 support.

Time to ditch PT and get a better solution.