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SNA Functionality

The following features are provided as part of the SNA services:

Local Termination

Local termination of the link is provided, so that the SNA application does not time out and cancel the local session.

PANL and RFC 1490 BAN Support

All SNA data (whether SDLC or LLC2) are encapsulated into RFC 1490 Boundary Access Node (BAN) frame relay packets prior to being sent out over the WAN. The RFC 1490 BAN packets have the option of being carried over a standard frame relay connection to another Frame Relay Access Device (FRAD) via a PVC, over a Passport Access Network Link (PANL) to a Passport 6400 unit via an SPVC, or another Passport 4400 unit via an SVC.

Multi-Drop Support

Multiple link stations can attach to the same physical port on the Passport 4400 unit.

Local Switching

The ability to locally switch the SNA traffic between local data ports is provided.

Same Destination Packet Combination

Only one PVC, SPVC, or SVC (depending on the type of host) needs to be established to transfer SNA data from an individual Passport 4400 unit to a destination host.

SNA over Ethernet

The SNA over Ethernet service allows SNA applications to co-exist with IP and IPX applications on the same LAN connected to the Passport 4400 unit.

TN3270

TN3270 traffic is passed transparently as IP traffic.


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