NS X.25 Migration: NS 3000/V to NS 3000/iX
Differences in X.25 Support
Differences in X.25 Support
There are differences in X.25 support between NS 3000/V and
NS 3000/iX which need to be considered when you migrate as described in the following paragraphs.
1980 Versus 1984 CCITT
NS 3000/V supports CCITT 1980 and NS 3000/iX supports both 1980 and 1984.
General Level 3 Differences
In MPE V X.25, a Reset is sent to initialize or clear a Permanent Virtual Circuit. In MPE/iX X.25, a Reset is not sent to initialize or clear a Permanent Virtual Circuit.
MPE V X.25 has a timeout on an interrupt collision. MPE/iX X.25 does not.
Level 3 Access with NetIPC
In addition to the X.25 features supported on NS 3000/V, NetIPC 3000/XL provides the following CCITT 1984 features:
•Fast select facility.
•The capability of modifying and reading the facility field in call packets.
•A new option in IPCDEST (called the destination network address option) allows you to directly specify an X.25 address or PVC number instead of a remote node name. See the NetIPC 3000/XL Programmers Reference Manual for more information. If using this feature, you can configure POOL as an X.25 Address Key with its security option set to “O” (outbound) in the X.25 SVC Address Key Paths screen to allow outbound calls to any destination address.
•IPCCONTROL request 12, reason for error or event, on NS 3000/V can return 14 (network shutdown), 15 (restart sent by local network), 16 (level 2 failure), 17 (restart sent by local protocol module), and 18 (restart packet received). IPCCONTROL on
NS 3000/XL only returns 10 (Clear), 11 (Reset), or 12 (Interrupt).
•In NS 3000/V, IPCSHUTDOWN does not complete until a clear confirmation arrives. In NS 3000/XL, IPCSHUTDOWN completes immediately.
•In NS 3000/V, IPCCREATE requires that the network name be padded with nulls. In NS 3000/XL, IPCCREATE requires the network name be
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