Configuring IP Information
Management and IP Interfaces
Cisco Small Business 300 Series Managed Switch Administration Guide  177
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- Dynamic—The default router was dynamically configured.
State—The default router status options are:
- Incomplete—Address resolution is in process. Default router has not yet 
responded.
- Reachable—Positive confirmation was received within the 
Reachable 
Time.
 
- Stale—Previously-known neighboring network is unreachable, and no 
action is taken to verify its reachability until it is necessary to send traffic.
- Delay—Previously-known neighboring network is unreachable. The 
switch is in Delay state for a predefined 
Delay Time.
 If no confirmation is 
received, the state changes to Probe.
- Probe—Neighboring network is unavailable, and Unicast Neighbor 
Solicitation probes are being sent to verify the status.
STEP  2 Click Add to add a static default router. The Add Default Router Page
 
opens.
The window displays the Link Local Interface. The interface can be a port, LAG, 
VLAN, or tunnel.
STEP  3 Enter the static default router IP address in the Default Router IPv6 Address field.
STEP  4 Click Apply. The default router is defined, and the switch is updated.
Configuring IPv6 Tunnels
The ISATAP (Intra-Site Automatic Tunnel Addressing Protocol) enables 
encapsulating IPv6 packets within IPv4 packets for transmission over IPv4 
networks. You must first manually enable and configure an ISATAP tunnel. Then 
you manually define an IPv6 interface at the ISATAP tunnel. Then the switch 
automatically configures the link local IPv6 address to the IPv6 interface.
When defining ISATAP tunnels, note the following: 
• An IPv6 link local address is assigned to the ISATAP interface. The initial IP 
address is assigned to the interface, which is then activated.
• If an ISATAP interface is active, the ISATAP router IPv4 address is resolved 
via DNS by using ISATAP-to-IPv4 mapping. If the ISATAP DNS record is not 
resolved, ISATAP host name-to-address mapping is searched in the host 
mapping table.