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Overview of IBM Networking
Cisco Transaction Connection
BC-239
Cisco IOS Bridging and IBM Networking Configuration Guide
78-11737-02
same LAN. When using native LAN support, SNASw responds only to requests that target the MAC
address configured on the local interface. Virtual Token Ring and SRB allow SNASw to respond to
multiple MAC addresses over the same physical interface.
Connection to Frame Relay Transport Technologies
Virtual Token Ring and SRB connect SNASw to a SNA Frame Relay infrastructure. FRAS host and SRB
Frame Relay are configured to connect virtual Token Ring interfaces that offer SNASw support for
Frame Relay boundary access node (BAN) or boundary network node (BNN) technology.
Connection to Channel Interface Processor and Channel Port Adapter
Virtual Token Ring and SRB can be used to connect SNASw to the Channel Interface Processor (CIP)
or Channel Port Adapter (CPA) in routers that support those interfaces.
Virtual Data-Link Control
SNASw uses Virtual Data-Link Control (VDLC) to connect to DLSw+ transport and local switching
technologies. VDLC is used for a number of connectivity options, including the following two:
• Transport over DLSw+ Supported Media, page 239
• DLC Switching Support for Access to SDLC and QLLC, page 239
Transport over DLSw+ Supported Media
Using VDLC, SNASw gains full access to the DLSw+ transport facilities, including DLSw+ transport
over IP networks, DLSw+ transport over direct interfaces, and DLSw+ support of direct Frame Relay
encapsulation (without using IP).
DLC Switching Support for Access to SDLC and QLLC
Through VDLC, SNASw gains access to devices connecting through SDLC and QLLC. This access
allows devices connecting through SDLC and QLLC access to SNASw.
Native IP Data-Link Control (HPR/IP)
SNASw support for the EE function provides direct HPR over UDP connectivity. This support is
configured for any interface that has a configured IP address. HPR/IP uses the interface IP address as the
source address for IP traffic originating from this node.
Cisco Transaction Connection
This section contains the following topics:
• CTRC and CICS, page 240
• CTRC and DB2, page 241
• Benefits of CTRC, page 242