Configuring IPv6 on Cisco Switch 3750V2

IPv6 addressing and unicast routing are disable by default on Cisco switches, all  those features has to be enabled before we can configure them.

Here is default IPv6 configuration:

Feature	Default Setting
SDM template	Advance desktop. Default is advanced template
IPv6 routing	Disabled globally and on all interfaces
CEFv6 or dCEFv6	Disabled (IPv4 CEF and dCEF are enabled by default) Note    When IPv6 routing is enabled, CEFv6 and dCEF6 are automatically enabled.
IPv6 addresses	None configured

No, SDM is not Security Device Manager, this actually stand for Switch Database Manager.

SDM templates are used to configure system resources in the switch to optimize support for specific features and to balance resources, in this case we are going to use for IPv6. For more details about SDM template go to: Cisco doc about SDM Template

HSRP Configuration

This going to be straightforward configuration. But at beginning lets see some default values for HSRP and states of device with enabled HSRP.

Default HSRP Configuration

Feature	Default Setting
HSRP groups	None configured
Standby group number	0
Standby MAC address	System assigned as: 0000.0c07.acXX, where XX is the HSRP group number. The HSRP Version 2 uses a new MAC address range 0000.0C9F.F000 to 0000.0C9F.FFFF. Your MAC address corresponds to the standby group number
Standby priority	100
Standby delay	0 (no delay)
Standby track interface priority	10
Standby hello time	3 seconds
Standby holdtime	10 seconds

HSRP States

When in operation, HSRP devices are configured into one of many states:

• Active – This is the state of the device that is actively forwarding traffic.
• Init or Disabled – This is the state of a device that is not yet ready or able to participate in HSRP.
• Learn – This is the state of a device that has not yet determined the virtual IP address and has not yet seen a hello message from an active device.
• Listen – This is the state of a device that is receiving hello messages.
• Speak – This is the state of a device that is sending and receiving hello messages.
• Standby – This is the state of a device that is prepared to take over the traffic forwarding duties from the active device.