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Introduction

Purpose 

The purpose of this document is to define the process for QOIU7 to OIU8 card replacement and ensuring continuity of services after the upgrade.

Document Revisions

Related Documentation

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Feature Comparisons of OIU Cards

Note: The primary mechanism for detecting loopbacks on the OIU8 for Access ports or end stations should always have at a minimum loopback detection enabled.  RSTP is resource intensive and should only be enabled on ports that are expected to be participating in the RSTP Topology such as when there is a downstream switch or device that is sending RSTP messages.  Ports with loopback enabled but RSTP off will detect BPDU packets and set an Access Violation: BPDU violation alarm.  If "Auto Disable is enabled in the NAC profile block the port for the duration of the Auto Re-enable Timeout.

OIU8 Installation/Card Replacements

Hardware Assembly for OIU8

The increased length of the OIU8 requires the replacement of the Front Door assembly.

Parts Required:

• 4125061-FSDR - FlexSym Door 19" 1150 Chassis

Tools Required:

• #3 Phillips Head Screwdriver (Hinge)
• 3/8" Nut Driver (Ground Wire)
• 5/16" Nut Driver (Hinge)
• 3/32" Flat Head Screwdriver (Hinge removal wedge)
• Hammer
  
  
   

Remove Door Assembly

1. Remove the Ground wire secured by a screw and washer using a 3/8" Nut Driver.
   
   
    

   Note: The screws attaching the two door hinges are floating and will have to be secured to remove their castle nuts.

2. To remove the castle nut, a small screwdriver (3/32" blade) or equivalent is placed between the flat head screw and the hinge, then wedged, Using a tap from a hammer to lock the screw so the castle nut can be removed.
   
   
    
3. After the screw is secured, remove the two castle head nuts and washers using a 5/16" nut driver or open-end wrench.
   
   
    
4. Remove the last two Phillips head screws and washers to remove the door from the 1150E assembly using the #3 Phillips head screwdriver. 
   
   
    
5. Swap out the two female hinges on the 1150E assembly with the ones provided with the flat head screw epoxied in.

Install New Door

1. Secure the new door on the two hinges with two external tooth lock washers and nuts using a 5/16" nut driver or open-end wrench.
   
   
    
2. Finish securing the door with the two washers and Phillips head screws using the #3 Phillips head screwdriver. 
3. Install the ground wire with a washer and screw using a 3/8" Nut Driver.

Software Pre-requisites for OIU8

The OIU8 requires a minimum software release SR31.3_603097 OLT load (System Release SR31.3.43).  Both the EMS and OLT must be upgrade to this release prior to installing or replacing any cards with an OIU8.  The latest releases can be obtained from the Tellabs Nexus Portal for any customer with a portal login at: https://nexus.tellabs.com/support/downloads.

Warning: The SR31.3.43 cannot detect loopbacks between QOIU7 cards an OIU8 cards.  It is critical that the network be scrubbed of any loopbacks between ports prior to the use of the OIU8.  A future release SR31.3.44 will support this capability.  Loopbacks between OIU8 cards are detected properly as are loopbacks on QOIU7 cards.

Preparation for QOIU7 to OIU8 Swaps

Customers with existing QOIU7s and GPON service that want to simply swap out the cards can transition to using the new cards with only a few preparatory steps: 

1. Ensure that the minimum release version specified above is installed.
2. It is a good idea to place the OIU8 into a spare slot of the OLT running the correct release prior to swapping with the QOIU7 and allowing it to upgrade.  This will minimize any outage time by getting the correct software release onto the card.  If this is not done, the outage will include the time to download the card which can lengthen the outage by 20-30 minutes.
3. Update any Port profiles to utilize Loopback Detection if it is not already enabled.  Alarms should be checked after any card replacement to ensure that any port loops are removed from the system.

It is also recommended that the NAC profiles include Auto Disable so that any looped ports are disabled and prevented from causing loops.

After removal of the QOIU7 card and replacement with an OIU8 card, all GPON service should be maintained.  The card will begin returning to service after several minutes.  The existing service will be placed onto the first 4 ports of the card, leaving 4 additional ports for GPON or XGS-PON service.

Preparation for New XGS-PON Service or OIU8 Installation to a new Slot

Often when installing the OIU8, additional XGS-PON service will be added or possibly pre-configured.

Upon installation of a new slot that did not previously have QOIU7 service configured, the OIU8 will default to XGS-PON configuration of all PONs.  All PONs should be verified for the correct PON mode prior to attempting to configure service on those PONs.

Upon PON card installation, the defaultXGSPON profile will be assigned.  If the PON port type does not match the desired type, a new profile should be created with the correct PON type. 

Adjacent even/odd ports must be configured to the same mode.  i.e. Ports 1/2 must be the same type, for example XGS-PON, but the next 2 ports can be a different type, for example ports 3/4 can be GPON.

FEC On is recommended for all XGS-PON ports to ensure the highest quality connection and help give additional engineering margin.  This will reduce the PON throughput to slightly over 8 Gb/s but for most installations that is more than sufficient.

Copying or Moving of PON Ports to an OIU8

Often, when moving from an QOIU7 to an OIU8, customers will install the new OIU8 card in an unused slot and pre-stage all the configuration, enabling a rapid transition to service on the new card when the cable is moved.  The system supports either Copying or Moving of PONs from one card to another.  

Prior to the Copy / Move you should assign the proper profile to the PON ports to match that of the PON port it is coming from.  The default PON profile on a newly installed card is XGS-PON unless the slot was previously configured.  

PON Port profile assignments are done as follows: 

Copy / Move is found on the right-click menu of each PON.  Move will move the ONTs to the new PON and delete the ONTs on the original PON once the move is complete.

Once the target is selected, the user can select either the Copy or Move button on the bottom of the dialog.

Differences between QOIU7 and OIU8 Behavior

Max MACs handling

The Max MACs handling for an OIU8 card is different than that of a QOIU7 card.  On a QOIU7 card, the NAC profile Max MACs field can be used for non 802.1x / MAB ports to limit the number of learned MACs on a port.

The OIU8 card performs this same function by using the ACL Max MACs setting.  To enable limiting the number of learned MACs on a UNI port hosted by the OIU8 card, the following steps should be performed.

• Set the VLAN ACL mode to Basic ACL Default Deny (this will block users by default).
• Add an ACL rule to the service profiles that have Max MACs set.  

The ACL rule would look something like the screenshot below: 

The ACL should be an ANY MAC ACL, and the Max MACs setting should be set to the desired number of MACs on the port.  The OLT will now enforce the number of macs learned on that port.

Loopback Detection

The OIU8 primarily uses Multicast Loopback packets to detect loops on ONT UNI ports.  The QOIU7 uses a different mechanism for the detection of loops.   It is important, unless there are specific network reasons not to enable Loopback detection, that you enable it on all ports.  This will help ensure the network remains loop-free and that any detected issues are blocked.  It is recommended that loopback detection always be enabled on all ports and this is the current default setting.

Post Installation Checks

The following checks should be performed after service has been placed on the OIU8 to ensure proper operation/service: 

• Mismatch Equipment Alarm (MEA) - Ensure no Mismatch Alarms exist for any OIU8 lasers indicating an improperly configured PON profile where the PON Type and installed Laser do not match.
• Access Violation (Loopback) - Ensure no Access Violation loopback alarms exist. Loopback detection indicates physically looped ports. The ports will be blocked. The alarm will include the location of the loopback and MAC address. Verify Loop detection is enabled in Ethernet Port Profile. 
• Access Violation (BPDU Guard) - Look for Access Violation BPDU Guard alarms on the system.  BPDU Guard will be performed on all ports with RSTP Disabled.  All ports with RSTP enabled will follow the BPDU guard configuration. Ports detecting BPDUs indicate a downstream switch and RSTP should be enabled, or the switch removed. RSTP on UNI ports should only be used on UNI ports where the attached device will have RSTP active and join the network topology.