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Chapter 9 - Interfaces to Non-VINES Protocols

Introduction

TCP/IP
IPX/SPX
AppleTalk
SNA

TCP/IP Interfaces

TCP/IP Server-to-Server
TCP/IP Routing

TCP/IP Server-to-Server

Note: The TCP/IP protocol type assigned to VINES is 83 (decimal).

Figure 9-1. Tunneling VINES Traffic Through a TCP/IP Network

TCP/IP Routing

Tunnel IP packets between a TCP/IP host and a workstation that runs the VINES Transport version of PC/TCP
Tunnel IP packets between TCP/IP networks through VINES networks

VINES Transport Version of PC/TCP

Figure 9-2. Sample VINES Network with PC/TCP

VINES IP header
VINES IPC short header, which follows the VINES IP header

0x14 - PC/TCP uses this port to send and receive TCP/IP traffic through the VINES network. This value is used as both the source and destination port number in the short IPC header.

0x15 - PC/TCP uses this port to exchange TCP/IP Address Resolution Protocol (ARP) traffic with the server. This value is used as both the source and destination port number in the short IPC header. The ARP header is encapsulated by VINES IP and IPC short headers.

Tunneling TCP/IP Traffic Through VINES Networks

VINES IP header, which follows the IP header
VINES IPC short header, which follows the VINES IP header

Figure 9-3. Tunneling TCP/IP Traffic Through a VINES Network.

1. The packet leaves Foreign Host 1 as an IP packet.

2. When the packet arrives at Server 1, the IP packet is encapsulated in a VINES IP packet (that is, a VINES IP header and a VINES IPC header is added).

3. The packet is routed through VINES to Server 2.

4. When the packet arrives at Server 2, the VINES IP header is stripped off.

5. The packet is routed to its destination via IP.

IPX/SPX Interfaces

Tunneling VINES Traffic Through NetWare Networks

Figure 9-4. Tunneling VINES Traffic Through a NetWare Network

1. Server 3 passes VINES packets to Server 2.

2. Before Server 2 passes packets to the NetWare file server that acts as the gateway to the NetWare network, it surrounds the packets in IPX protocol headers.

3. When Server 1 receives the packets, it strips off the IPX protocol headers so that Workstation 1 can interpret the packets.

Tunneling NetWare Traffic Through VINES Networks

VINES IP header
VINES IPC short header, which follows the VINES IP header

Figure 9-5. NetWare Tunnel Through a VINES Network

1. When ENS Server 1 passes packets to ENS Server 2, ENS Server 1 encapsulates the packets in VINES IP and short IPC protocol headers for transmission through the VINES network.

2. When the packets reach ENS Server 2, ENS Server 2 removes the VINES IP and short IPC headers so that the packets can be forwarded to NetWare File Server 2.

AppleTalk Interface

VINES IP header
VINES IPC short header, which follows the VINES IP header

Figure 9-6. Tunneling AppleTalk Packets

SNA Interface

1. VINES packets are sent from the server to the gateway where headers are appended.

2. On reaching the destination:

- The headers are stripped.

- The packet is routed in the VINES network.

Figure 9-7. Tunneling VINES Traffic Through an SNA Network

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