Replacing an NPU1 C with an NPU1 D
both slots cleared before an NPU1 D is inserted. This means that Ethernet
Switch Protection does not protect the NE during the replacement.
Replacing an NPU1 C interrupts the following traffic types:
• Traffic connected to the PDH Interfaces at the NPU1 C front panel
• Traffic connected to the Ethernet Interfaces at the NPU1 C front panel
• Traffic routed through the NPU1 C for robbed timeslot DCN connections
• Ethernet traffic connected through the NPU1 C backplane
• DCN connections to all far-end NEs
4.3.1 Removing an NPU1 C
Caution!
Electrostatic Discharge (ESD) may damage the equipment. Always use an
approved ESD wrist strap to avoid damage to components fitted on printed
circuit boards.
To minimize downtime when removing two NPU1 C units configured for
Ethernet Switch Protection, do as follows:
1. Set the Ethernet Switch in the NPU in the primary slot to active.
2. Remove the NPU in the secondary slot according to the procedure
described in Section 4.3.1.2 on page 10.
3. Remove the NPU in the primary slot according to the procedure described
in Section 4.3.1.1 on page 8.
4.3.1.1 Removing an NPU1 C from the Primary Slot
Remove an NPU1 C from the primary slot by performing the following steps:
1. Clean any switch ports connected to the NPU1 C by assuring that the
following conditions are met:
• The port is not a member of any VLAN. See Configuring an Ethernet
Layer 2 Connection, Reference [17].
• The port is not a member of any LAG. See Configuring Link Aggregation
Groups (LAG), Reference [18].
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107/1543-HRA 901 20-V11 Uen B | 2015-12-01
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