Avaya Configuring DECnet Services Bedienungsanleitung PDF herunterladen (Seite 30)

Configuring DECnet Services

1-14

308619-14.00 Rev 00

DECnet IV to V Basic Transition Strategy

Nortel Networks uses a dual-stack approach to support the DECnet IV to V

Transition feature. This approach provides the following advantages:

• Phase IV and Phase V routing are done in parallel. A router routes packets

whose source and destination nodes operate the same phase of DECnet, using

their native routing protocol.

• A router translates a packet when necessary and only once.

• You can transition routers incrementally rather than all at once.

The following strategy allows you to use the DECnet IV to V Transition feature to

support a graceful migration from a Phase IV network to a Phase V network.

All routers run Phase IV with contiguous areas and contiguous Level 2

backbone.

All routers continue to run Phase IV. On an individual basis, routers run Phase

V with the DECnet IV to V Transition feature enabled. All routers running

Phase V are contiguous within areas.

All routers in the routing domain run Phase IV and Phase V with the DECnet

IV to V Transition feature enabled.

Phase IV is turned off on an individual basis; continuity is not necessary at

this point. If Phase IV routing fails for a particular DECnet data packet, then

the router forwards the packet using Phase V.

All routers run Phase V. Only routers with adjacent Phase IV-only end nodes

run Phase IV and Phase V with the DECnet IV to V Transition feature

enabled. A Phase V host runs in Phase IV-compatible mode when it is on the

same local area network (LAN) segment as a Phase IV host.

For details on adding the DECnet IV to V Transition feature and editing the

parameters, refer to Chapter 3.

1 2 ... 25 26 27 28 29 30 31 32 33 34 35 ... 79 80

Keine Kommentare

Avaya Configuring DECnet Services Bedienungsanleitung Seite 30