Alcatel-Lucent 9500 MXC User Manual page 501

3DB 23063 ADAA - Rev 004 July 2007
15. A unique IP address must be entered for the IDU partners (each must be seen
as a separate device on the management network).
• The network portion of the IP address must be common. The host portion
must be unique (both IDUs are on the same LAN).
• OSPF or RIP should be selected. Static routing can be used but care must be
exercised within a network of two or more hops of protected IDUs in the
event the IDU providing the cabled Ethernet NMS connection to the next
hop is powered-down/withdrawn and it is necessary to transfer the cable to
its partner IDU.
16. For IDUI 155o, and for IDU 20x with protected capacities to 20xE1 or
16xDS1, two tributary protection options are provided; Tributary Protection
(TT), and Tributary Always On (TA). Tributary Protection is normally used.
For the IDU 20x a third option is provided on capacities above 20xE1 or
16xDS1: Hot Standby: Non-protected Tributary.
• For a Tributary Protected selection, "Y" split/merge trib cable assemblies
must be used. Trib-in (from customer) is connected to both IDUs, but only
the online Tx IDU transmits. Trib-out (to customer) connects data from the
online receiver only; the standby trib-out function is muted.
• For Tributary Always-On option (TA selection), standard trib cable
assemblies are used to connect each IDU to the customer equipment. Trib-in
(from customer) is connected to both IDUs, but only the online Tx IDU
transmits (as for a TT selection). Trib-out (to customer) connects received
data from both the online and standby IDUs; the customer equipment
provides selection of the receive stream.
• For IDU 20x, Hot Standby: Non-protected Tributary, must be selected
where the IDUs are used for capacities above 20xE1 or 16xDS1.
17. LOS on any trib interface is a switching condition. Ensure all traffic-carrying
tribs are commissioned (commissioned tick-box for relevant trib(s) in
Plug-ins screen is ticked). Equally, ensure all tribs not carrying traffic are not
commissioned (not ticked). Except that LOS is not a switching condition for
IDU 20x when configured for capacities above 20xE1 / 16xDS1.
18. Once a protected pairing is configured, one IDU may be withdrawn from
service (power off) without affecting their protection configuration.
19. When a failed IDU is repaired or replaced it immediately becomes available
(after start-up) for protection service, providing the original CompactFlash
card is installed.
20. A protection guard timer mechanism prevents protection switching
oscillation. Refer to Switching Guard Times on page 3-93, Volume II,
Chapter 3.
9500 MXC User Manual
Vol. IV-8-19