Linksys SGE2000 Cisco Small Business SFE/SGE2xxx Series Managed Switches Admin - Page 206
Configuring ISATAP Tunnels, Default Gateway IP Address
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Configuring IP Information IP Addressing 7 • Default Gateway IP Address - Defines the Static Default Gateway IP Address. STEP 3 Define the relevant fields. STEP 4 Click Apply. The Default Gateway is defined, and the device is updated. Configuring ISATAP Tunnels The Intra-Site Automatic Tunnel Access Protocol (ISATAP) enables encapsulating IPv6 packets within IPv4 packets for transmission over IPv4 networks. ISATAP is considered a single IPv6 interface. When enabling ISATAP, the automatically generated Link Local IPv6 address is assigned to the interface and the interface becomes active. When defining ISATAP tunnels, note the following: • IPv6 Link Local address is assigned to the ISATAP interface. The initial IP address is assigned to the interface, and the interface state becomes Active. • If a ISATAP interface is active, the ISATAP router IPv4 address is resolved via DNS by using ISATAP-to-IPv4 mapping. If ISATAP DNS record is not resolved, ISATAP host name-to-address mapping is searched in the host name cache. • When ISATAP router IPv4 address is not resolved via DNS process, the status of the ISATAP IP interface remains Active. The system does not have a default gateway for ISATAP traffic until the DNS procedure is resolved. Cisco Small Business SFE/SGE Managed Switches Administration Guide 197