Nokia T66520, MW1122 user manual Routing, Bridging, Data VCC operation

MW1122 User Manual

connections are used for routing IP traffic, the VBRIDGE interface must be used instead of LAN/WLAN IP addresses. Alternatively, this interface is used in bridge only application when the IP address is required for remote management purposes.

Data VCC operation

MW1122 supports the following encapsulations in each ATM data virtual channel individually:

DRFC2684 LLC encapsulation for bridged IP (ETH-LLC)

DRFC2684 LLC encapsulation for routed IP (IP-LLC)

DRFC2364 Virtual circuit multiplexed PPP over AAL5 (PPP-VC)

DRFC2364 Virtual circuit multiplexed PPP over AAL5 used to tunnel LAN/WLAN/VBRIDGE PPTP packets (TUNNELED-PPP-VC)

If an IP address is given to a virtual channel interface and bridging is enabled at that interface, then IP data at that interface is routed and all other protocols are bridged. The only encapsulation which allows both bridging and routing simultaneously is ETH-LLC. For example, it is possible to route ETH-LLC encapsulated packets and at the same time bridge, for example, PPPoE packets (PPPoE packets are transported directly over Ethernet frame, not within IP packets).

4.2Routing

Routing is based on routing entries in a routing table. Static routes are added via the management interface and dynamic routing is done using RIP and RIPv2. Routing is done between the Ethernet 10Base-T interface, the wireless LAN interface and the virtual channel connection (VCC) of the ATM/ADSL interface. MW1122 supports up to 8 simultaneous VCCs.

MW1122 supports IGMP (Internet Group Management Protocol) proxy receive function for IP multicast applications.

4.3Bridging

Bridging is supported to provide full protocol transparency. Bridging can be used simultaneously with IP routing. MW1122 works as a self-learning bridge supporting up to 1024 MAC addresses. Bridging is done between the Ethernet 10Base-T interface, the wireless LAN

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