LLC2

The SNA services LLC2 implementation includes the following key features:

• Type II LLC communication
• SNA LAN communication (including XID and TEST retries)
• Support for primary or secondary link station roles
• Modulo 128 sequence numbering
• Provision of IBM's Dynamic Window Algorithm for controlled restart of I-frame traffic after LAN congestion
• Access to the underlying LANs for router-type applications
• Ethernet and frame relay MAC types:
• Auto-sensing of 802.3 and DIX2 Ethernet frame formats
• Boundary Access Node (BAN)