IPv6 L3 Routing

[Andy Saunders]

Hi

Im trying to setup IPv6 inter vlan routing in my lab on a C3750

version 12.2

loaded with sdm prefer dual-ipv4-and-ipv6 default

Any devices i plug in to its vlan get the correct unique local IPv6 address

Do i just need to use RIP or EIGRP for the routing? or am i missing something fundamental with using a L3 switch?

Current setup is 

ipv6 unicast-routing

interface FastEthernet1/0/1

switchport access vlan 100

switchport mode access

!

interface FastEthernet1/0/2

switchport access vlan 100

switchport mode access

interface FastEthernet1/0/5

switchport access vlan 200

switchport mode access

!

interface FastEthernet1/0/6

switchport access vlan 200

switchport mode access

interface Vlan100

no ip address

ipv6 address FD2E:339B:A150:100::/64 eui-64

ipv6 enable

ipv6 nd ra interval 10

!

interface Vlan200

no ip address

ipv6 address FD2E:339B:A150:200::/64 eui-64

ipv6 enable

ipv6 nd ra interval 10

[Reza Sharifi · Accepted solution]

Hi,

If you are using multiple vlans using the same switch, there is no need for any routing protocols. The vlans are connected interfaces and the routing should work between vlans.  For ipv6, your need "IP Service"license installed. "sh ver" will show you what license you have.

HTH

[Andy Saunders]

Hi

I do have the IP Services licence installed, but cant ping between vlans

Any idea what ive missed?

[Reza Sharifi]

Hi,

Can you post the output of "sh sdm prefer"?

Also, have you configured sdm prefer routing?

HTH

[Andy Saunders]

configured with sdm prefer dual-ipv4-and-ipv6 default

#sh sdm prefer
The current template is "desktop IPv4 and IPv6 default" template.
The selected template optimizes the resources in
the switch to support this level of features for
8 routed interfaces and 1024 VLANs.

number of unicast mac addresses: 2K
number of IPv4 IGMP groups + multicast routes: 1K
number of IPv4 unicast routes: 3K
number of directly-connected IPv4 hosts: 2K
number of indirect IPv4 routes: 1K
number of IPv6 multicast groups: 1.125k
number of directly-connected IPv6 addresses: 2K
number of indirect IPv6 unicast routes: 1K
number of IPv4 policy based routing aces: 0
number of IPv4/MAC qos aces: 0.5K
number of IPv4/MAC security aces: 1K
number of IPv6 policy based routing aces: 0
number of IPv6 qos aces: 0.625k
number of IPv6 security aces: 0.5K

[Reza Sharifi]

Not sure what version you are running but have a look the config guide for 12.2(55)

https://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst3750/software/release/12-2_55_se/configuration/guide/scg3750/swipv6.html

HTH

[Andy Saunders]

thanks for all the help, in the end it was my fault, my PC has two NIC's both on different IPv6 networks, disabled one of them and routing worked first time.

Ive spent on and off all days hunting the problem, sorry to waste yours

Andy

[Reza Sharifi]

No problem Andy.

Glad to know its all working now.

Reza