Overview: Cisco CRS-3 Flexible PLIM

This chapter describes the flexible PLIM that is supported on the Cisco CRS-3 router and contains the following sections:

Flexible PLIM Summary

The Cisco CRS-3 Flexible PLIM supports SPAs and has four SPA bays available. The Cisco CRS-3 Flexible PLIM has six integrated, 10 GE ports. These ports support multiple framing options, including WAN, LAN, and OTN. These ports also support Tunable DWDM optics, turning the 6-ports into 10 GE IP over DWDM (IPoDWDM) interfaces.

The PLIM mates with its associated modular services card (MSC) through the chassis midplane. Each available SPA provides different interface types and port densities. For a description of the SPAs supported on the Cisco CRS-3 Flexible PLIM, see Chapter 4, “Overview: Cisco CRS Shared Port Adapters.”


Note
The total throughput on the MSC is 107 Mpps. The Cisco CRS-3 Flexible PLIM uses 64 Mpps (60%) for the fixed 10 GE ports, and 43 Mpps (40%) for the SPA (flex) ports. Depending on the traffic, you may experience uneven packet drops between the fixed ports and the flex ports on the PLIM.

Table 1 shows a summary description of the PLIM supported on the Cisco CRS-3 router.

Table 1 PLIM Summary

PLIM

Product Number

Description

Maximum Number of SPAs

Minimum Cisco IOS XR Software

Minimum Hardware Revision

Cisco CRS-3 Flexible PLIM

6-10GE-WLO-FLEX

Cisco CRS Series 6x10GbE OTU2 Flex Interface Module

4 single-width

Release 4.3.0

1.0

Cisco CRS-3 Flexible PLIM Overview

The following sections describe the Cisco CRS-3 Flexible PLIM:

LEDs

The Cisco CRS-3 Flexible PLIM has two LEDs, as shown in the fugure below.

Figure 1. Cisco CRS-3 Flexible PLIM Faceplate

1

PLIM Status LED

2

Port Status LEDs

The table below describes the Cisco CRS-3 Flexible PLIM LEDs.

Table 2 Cisco CRS-3 Flexible PLIM LED

LED Label

Color

State

Meaning

PLIM Status LED

Green

On

The PLIM is powered on and operational.

Amber

On

The PLIM has a problem or is disabled by software.

Off

Off

The PLIM is powered off.

Port Status LED

Green

On

The port is enabled by software and there is a valid link.

Amber

On

The port is disabled by software or there is a problem with the link.

Off

Off

The PLIM is powered off.

Identifying Slots and Subslots for PLIMs and SPAs

The following sections describe PLIM, SPA, and interface numbering:

PLIM Slot Locations on the Cisco CRS-3 Router

A PLIM can be installed in slots 0 through 15 on the Cisco CRS-3 router 16-slot line card chassis and in slots 0 through 7 on the Cisco CRS-3 router 8-slot line card chassis. The figures below show the slot numbering on the front (PLIM side) of the line card chassis.

Figure 2. 16-Slot Line Card Chassis Slot Numbers—Front (PLIM) View

Figure 3. 8-Slot Line Card Chassis Slot Numbers—Front (PLIM) View

For additional information about the slot locations of PLIMs and their associated modular services cards (MSCs), see Cisco CRS Carrier Routing System 16-Slot Line Card Chassis System Description or Cisco CRS Carrier Routing System 8-Slot Line Card Chassis System Description . Both documents are available online from the specific chassis hardware documentation links at the following URL:

http:/​/​www.cisco.com/​en/​US/​products/​ps5763/​prod_​installation_​guides_​list.html

SPA Slot Numbering on the Cisco CRS-3 Flexible PLIM

The Cisco CRS-3 Flexible PLIM accepts four single-width SPAs. The figure below shows a Cisco CRS-3 Flexible PLIM with two 4-Port OC-48c/STM-16 POS/RPR SPAs installed in subslots 1 and 3.

The figures below illustrate the SPA subslot locations on the Cisco CRS-3 Flexible PLIM. The subslot labels are located inside the SPA subslot and are only visible when the SPA is not installed.

Figure 4. Cisco CRS-3 Flexible PLIM—SPAs Installed

1

SPA subslot 1

3

SPA subslot 3

2

SPA subslot 2

4

SPA subslot 4

Figure 5. Cisco CRS-3 Flexible PLIM Subslot Locations

SPA Interface Addresses on PLIMs

SPAs in the Cisco CRS-3 Flexible PLIM running Cisco IOS XR Software Release 4.3.0 use an addressing format that specifies the physical location of the PLIM, SPA, and interface. The interface address format is rack /slot /subslot /port , where:

  • rack —Specifies the rack number, 0 in a single-chassis system.
  • slot —Specifies the slot number in which the Cisco CRS-3 Flexible PLIM is inserted:
    • For the 8-slot line card chassis—0 through 7
    • For the 16-slot line card chassis—0 through 15
  • subslot — Specifies the slot in which the SPA is inserted —1 through 4
  • port —Specifies the interface number that you want to select on the SPA:
    • For the 1-Port OC-192c/STM-64 POS/RPR XFP SPA—0 is the only option
    • For the 4-Port OC-48c/STM-16 POS/RPR SPA—0 through 3
    • For the 8-Port Gigabit Ethernet (V2) SPA—0 through 7

Restrictions

Thermal and high-powered restrictions:

  • 4-slot chassis—No slot restrictions.
  • 8-slot chassis—No slot restrictions.
  • 16-slot chassis (for non-VE chassis)—The Cisco CRS-3 Flexible PLIM is a high-powered PLIM. Cisco CRS high-powered PLIMs are subject to slot placement restrictions on the legacy 16-slot chassis. The following error message appears if these restrictions are not followed:

PLATFORM-SHELFMGRV2-4-HIGH_POWERED_PLIM_NOT_POWERED_ON_IN_LOWER_BAY

The following PLIMs are high-powered PLIMs:

    • CRS-CGSE-PLIM—Cisco CRS Carrier Grade Services Engine (CGSE) PLIM
    • 1OC768-DPSK/C-O—Cisco CRS-1 1xOC768 (C-band) DPSK+ DWDM PLIM (Offset TDC)
    • 6-10GE-WLO-FLEX—Cisco CRS Flexible PLIM
    • 4-40GE-L/OTN—Cisco CRS 4-Port 40 GE LAN/OTN Interface Module

The rules for placement of high-powered PLIMs are:

  1. A FLEX PLIM (6-10GE-WLO-FLEX) in the lower shelf cannot be placed under a CGSE PLIM directly above in the upper shelf.
  2. High-powered PLIMs may only be placed in lower slots if a high-powered PLIM is in the slot directly above or if the slot above is empty.
  3. 16-slot enhanced chassis—No slot restrictions.