Migrating X.25 over PSI to X.25 over TCP/IP (XOT)

9 Migrating X.25 over PSI to XOT
XOT is supported on Ethernet cards. This section discusses how to migrate X.25 over PSI to XOT,
using Ethernet cards. The migration of X.25 over PSI to XOT involves the following:
• Hardware migration
• Configuration migration
• Application migration
Hardware Migration
The following hardware elements, which are a part of the X.25 network, are impacted in the
migration process:
• Cards
The HP-UX X.25 PSI card (Part numbers J3525A or J3526A) is replaced with a supported
LAN card. The supported Ethernet cards are Fast Ethernet cards, Gigabit Ethernet and 10
Gigabit Ethernet cards, in both HP Integrity Blade and HP Integrity Rack server models.
• Cables
The X.25 cable used with the X.25 PSI card is replaced with a LAN cable, which is compatible
with the LAN adapter used.
• Switches and routers
In X.25 over PSI, an X.25 switch is used as the DCE. The DCE routes X.25 to the remote DTE.
For XOT, no additional routing equipment is required as the X.25 packets emanating from
the DTE would be encapsulated within a TCP/IP packet and can be routed across a TCP/IP
network. The peer for an XOT client could be any of the following:
◦ A X.25 host which understands only X.25/LAPB protocol. In this case, a routing equipment
capable of converting TCP/IP (XOT Packet) to X.25/LAPB protocol would be required.
◦ A X.25 host which understands only XOL(ISO – 8881 Standard) In this case, a routing
equipment capable of converting TCP/IP (XOT packet) to XOL protocol would be required.
◦ A X.25 host which understands only XOT protocol(RFC 1613)
NOTE: HP-UX XOT supports all routers that conform to RFC 1613. Configurations
explained in this whitepaper were validated with Cisco 2851 Router model.
12 Migrating X.25 over PSI to XOT