Enable Cross-rack Pairing
Verify System Readiness
Enable Inter-rack Pairing Mode
Enable Inter-rack Pairing in Multi-SDR Configuration
Manually Initiate Re-pair
Use Cases for Re-pairing RP
- Use Case: Automatic Re-pairing Algorithm
- Use Case: Manual Re-pairing Algorithm
Process Placement after a Pairing Change

Enable Cross-rack Pairing

Cross-rack (or inter-rack) pairing allows pairing route processors (RP) between racks to provide high availability (HA) against rack failures. The RP of one rack is paired with the RP on the next rack. The pairing is determined by the SDR manager through a daisy chain algorithm. The XR process manager breaks or creates a new pair based on the pairing algorithm decided by the SDR manager. The algorithm is executed only on the discovered set of nodes. The pairing remains consistent as long as the set of nodes that were discovered is constant.

Figure 1. Inter-rack pairing using daisy chain algorithm

Only the racks with dual RPs (an RP on both slots of rack) are considered for inter-rack pairing.

The pairing algorithm is triggered automatically when:

a rack is inserted
a change in chassis configuration is committed
RP card is inserted
re-pair command is manually executed
change in configuration between inter-rack to intra-rack pairing, and vice versa

Cross rack pairing is not supported on racks when:

inserted into the system with only one RP
transitions to a state of single RP, and a change in cross-rack pairing is triggered either manually or automatically. An example of automatic and manual trigger are:
- a re-pair is automatically initiated when a rack or an RP is added or deleted from the configuration
- user can trigger a re-pair after online insertion or removal (OIR) of an RP

For more information about scenarios that initiate automatic and manual re-pair of RPs, see Use Cases for Re-pairing RP.

Verify System Readiness

The system must be ready before and after enabling inter-rack pairing. Run these commands to improve debuggability and compare their output to expected behavior. This ensures that the system is ready, and any changes in System Admin are reflected in XR VMs.

Description Commands

Verify that all nodes are in OPERATIONAL state, a standby RP is available and in READY state.

SysAdmin VM:

show sdr default-sdr pairing

show platform

show platform slice

show vm

show version

show inventory

show log

show install log

show run

dir harddisk:

XR-VM:

show redundancy

show redundancy summary

show platform vm

show placement program all

show health gsp

show health sysdb

show platform

show log

show install log

show run

show placement reoptimize

cfs check

dir harddisk:

Verify the fabric health and system environment. Ensure all fabric planes are UP, and fan speed is not zero.

Note

A power module in FAILED state may not indicate a problem. A power module that is inserted and powered Off will appear as failed.

SysAdmin VM:

show controller fabric health

show controller fabric plane all

show alarms detail

show environment power

show environment fan

show environment temp

Verify the current packages installed on the device.

SysAdmin (Calvados) VM:

show install active

show install committed

show install inactive

show install repository

XR-VM:

show install active

show install committed

show install inactive

show install repository

Enable Inter-rack Pairing Mode

The pairing mode is a SDR configurable option. The default mode is intra-rack, and the pairing algorithm is run when inter-rack (also known as cross-rack) pairing mode is enabled.

Note

Traffic loss may occur when moving between inter-rack and intra-rack pairing modes. All cross-rack related triggers must be done in a maintenance window. For more information about scenarios that initiate automatic and manual re-pair of RPs, see Use Cases for Re-pairing RP.

Before you begin

Verify the status of the system. For more information, see Verify System Readiness.

SUMMARY STEPS

conf
sdr default-sdr pairing-mode inter-rack
end
show sdr default-sdr pairing

DETAILED STEPS

	Command or Action	Purpose
Step 1	conf Example: `sysadmin-vm:0_RP0#conf`	Enter System Admin Config mode.
Step 2	sdr default-sdr pairing-mode inter-rack Example: `sysadmin-vm:0_RP0(config)# sdr default-sdr pairing-mode inter-rack`	Enable inter-rack pairing mode.
Step 3	end Example: `Uncommitted changes found, commit them? [yes/no/CANCEL] yes Commit complete.`	Commit the changes.
Step 4	show sdr default-sdr pairing Example: `sysadmin-vm:0_RP0# show sdr default-sdr pairing Pairing Mode INTER-RACK SDR Lead Node 0 0/RP0 Node 1 1/RP1 Pairs Pair Name Pair0 Node 0 0/RP0 Node 1 1/RP1 Pairs Pair Name Pair1 Node 0 1/RP0 Node 1 2/RP1 Pairs Pair Name Pair2 Node 0 2/RP0 Node 1 0/RP1`	Verify that the pairing is inter-rack and the partner nodes are on different racks.

Enable Inter-rack Pairing in Multi-SDR Configuration

This task shows how to enable inter-rack pairing mode in a multi-SDR configuration.

SUMMARY STEPS

show running-config sdr
show sdr default-sdr pairing
conf
no sdr default-sdr
sdr <sdr-name>
show running-config sdr
show sdr <sdr-name> pairing

DETAILED STEPS

	Command or Action	Purpose
Step 1	show running-config sdr Example: `sysadmin-vm:0_RP0# show running-config sdr sdr default-sdr pairing-mode intra-rack location all ! !`	Show the running configuration for the SDR.
Step 2	show sdr default-sdr pairing Example: `sysadmin-vm:0_RP0# show sdr default-sdr pairing Pairing Mode INTRA-RACK SDR Lead Node 0 0/RP0 Node 1 0/RP1 Pairs Pair Name Pair0 Node 0 0/RP0 Node 1 0/RP1 Pairs Pair Name Pair1 Node 0 1/RP0 Node 1 1/RP1 Pairs Pair Name Pair2 Node 0 3/RP0 Node 1 3/RP1`	Display the default pairing in the SDR.
Step 3	conf Example: `sysadmin-vm:0_RP0# conf Entering configuration mode terminal`	Enter the configuration mode.
Step 4	no sdr default-sdr Example: `sysadmin-vm:0_RP0(config)# no sdr default-sdr sysadmin-vm:0_RP0(config)# commit Commit complete.`	Remove the default SDR.
Step 5	sdr <sdr-name> Example: sysadmin-vm:0_RP0(config)# sdr abc sysadmin-vm:0_RP0(config-sdr-abc)# pairing-mode inter-rack sysadmin-vm:0_RP0(config-sdr-abc)# location 0/RP0 sysadmin-vm:0_RP0(config-location-0/RP0)# location 0/RP1 sysadmin-vm:0_RP0(config-location-0/RP1)# location 1/RP0 sysadmin-vm:0_RP0(config-location-1/RP0)# location 1/RP1 sysadmin-vm:0_RP0(config-location-1/RP1)# sdr xyz sysadmin-vm:0_RP0(config-sdr-xyz)# pairing-mode inter-rack sysadmin-vm:0_RP0(config-sdr-xyz)# location 0/RP0 sysadmin-vm:0_RP0(config-location-0/RP0)# location 0/RP1 sysadmin-vm:0_RP0(config-location-0/RP1)# commit Commit complete.	Configure two new SDRs with pairing set to inter-rack mode.
Step 6	show running-config sdr Example: `sysadmin-vm:0_RP0# show running-config sdr sdr abc pairing-mode inter-rack location 0/RP0 ! location 0/RP1 ! location 1/RP0 ! location 1/RP1 ! ! sdr xyz pairing-mode inter-rack location 0/RP0 ! location 0/RP1 ! !`	Verify that the new SDRs are included in the multi-SDR configuration.
Step 7	show sdr <sdr-name> pairing Example: `sysadmin-vm:0_RP0# show sdr abc pairing Pairing Mode INTER-RACK SDR Lead Node 0 0/RP0 Node 1 1/RP1 Pairs Pair Name Pair0 Node 0 0/RP0 Node 1 1/RP1 Pairs Pair Name Pair1 Node 0 1/RP0 Node 1 0/RP1 sysadmin-vm:0_RP0# show sdr xyz pairing Pairing Mode INTER-RACK SDR Lead Node 0 0/RP0 Node 1 0/RP1 Pairs Pair Name Pair0 Node 0 0/RP0 Node 1 0/RP1`	Verify that the new SDRs are paired in the inter-rack pairing mode.

Manually Initiate Re-pair

The user can manually initiate a re-calculation of the inter-rack pairing algorithm. This task changes the pairing based on the current state of the card inventory.

SUMMARY STEPS

sdr default-sdr re_pair
show sdr default-sdr pairing

DETAILED STEPS

Command or Action Purpose

Step 1

sdr default-sdr re_pair

Example:

sysadmin-vm:0_RP1# sdr default-sdr re_pair
Current Configuration
    0/RP0 1/RP1
    1/RP0 2/RP1
    2/RP0 0/RP1
Re_Paired Configuration
    0/RP0 1/RP1
    1/RP0 0/RP1
Would you like to proceed ? [yes/no]:  yes
Proceeding with action

Display the prediction of change in the re-pair configuration. Observe that rack 2 is down, and the re_pair command optimizes the pairing based on this change.

Note

Proceeding with the re-pair action even when the re_pair command does not predict any changes does not affect the system.

Step 2

show sdr default-sdr pairing

Example:

sysadmin-vm:0_RP0#show sdr default-sdr pairing 
 Pairing Mode  INTER-RACK
 SDR Lead
   Node 0 0/RP0
   Node 1 1/RP1
 Pairs
   Pair Name Pair0
    Node 0   0/RP0
    Node 1   1/RP1
 Pairs
   Pair Name Pair1
    Node 0   1/RP0
    Node 1   0/RP1

Verify that the pairing shows the updated configuration.

Use Cases for Re-pairing RP

In this section, certain use cases with automatic and manual re-pairing of RPs are described.

Use Case: Automatic Re-pairing Algorithm

Insert a Rack Online

This task shows the automatic recalculation of pairing algorithm when a rack is inserted online. For more information about installing RP cards, see Cisco ASR 9000 Series Aggregation Services Router Hardware Installation Guide.

SUMMARY STEPS

show chassis
show redundancy summary
show sdr default-sdr pairing
show running-config chassis
conf
chassis serial <serial-number> rack 1
commit
Insert the rack.
show chassis
show sdr default-sdr pairing
show redundancy summary
show running-config chassis

DETAILED STEPS

	Command or Action	Purpose
Step 1	show chassis Example: `sysadmin-vm:F1_SC0# show chassis Serial Num Rack Num Rack Type Rack State Data Plane Ctrl Plane ---------------------------------------------------------------------------------------------- FLM171662RX 0 LCC UP CONN CONN FMP17260280 F1 FCC UP CONN CONN`	Shows the chassis details including the chassis serial number. In the example, observe that rack 1 has not been associated with the chassis configuration.
Step 2	show redundancy summary Example: `Router#show redundancy summary Active Node Standby Node ----------- ------------ 0/RP0/CPU0 0/RP1/CPU0 (Node Ready, NSR:Ready)`	View the redundancy summary of the node.
Step 3	show sdr default-sdr pairing Example: `sysadmin-vm:3_RP1# show sdr default-sdr pairing Pairing Mode INTER-RACK SDR Lead Node 0 0/RP0 Node 1 0/RP1 Pairs Pair Name Pair0 Node 0 0/RP0 Node 1 0/RP1`	View the current pairing information.
Step 4	show running-config chassis Example: `sysadmin-vm:F1_SC0# show running-config chassis chassis serial FLM171662RX rack 0 ! chassis serial FMP17260280 rack F1 !`	Check the current chassis configuration.
Step 5	conf Example: `sysadmin-vm:F1_SC0# conf`	Enter the System Admin Config mode.
Step 6	chassis serial <serial-number> rack 1 Example: `sysadmin-vm:F1_SC0(config)# chassis serial FLM171762WW rack 1`	Enter the configuration mode for the chassis with the rack number associated to the chassis.
Step 7	commit Example: `sysadmin-vm:F1_SC0(config)# commit Commit complete.`	Commit the changes.
Step 8	Insert the rack.
Step 9	show chassis Example: `sysadmin-vm:F1_SC0# show chassis Serial Num Rack Num Rack Type Rack State Data Plane Ctrl Plane ---------------------------------------------------------------------------------------------- FLM171662RX 0 LCC UP CONN CONN FLM171762WW 1 LCC UP CONN CONN FMP17260280 F1 FCC UP CONN CONN`	Verify that rack 1 is visible.
Step 10	show sdr default-sdr pairing Example: `sysadmin-vm:3_RP1# show sdr default-sdr pairing Pairing Mode INTER-RACK SDR Lead Node 0 0/RP0 Node 1 1/RP1 Pairs Pair Name Pair0 Node 0 0/RP0 Node 1 1/RP1 Pairs Pair Name Pair1 Node 0 1/RP0 Node 1 0/RP1`	Verify that rack1 is included in the pairing that was automatically updated after inserting the rack.
Step 11	show redundancy summary Example: `Router#show redundancy summary Active Node Standby Node ----------- ------------ 0/RP0/CPU0 1/RP1/CPU0 (Node Ready, NSR:Ready) 1/RP0/CPU0 0/RP1/CPU0 (Node Ready, NSR:Ready)`
Step 12	show running-config chassis Example: `sysadmin-vm:F1_SC0# show running-config chassis chassis serial FLM171662RX rack 0 ! chassis serial FLM171762WW rack 1 ! chassis serial FMP17260280 rack F1 !`	Verify the chassis configuration.

Remove a Rack from System

This task shows the automatic recalculation of pairing algorithm when a rack is deleted from the configuration.

SUMMARY STEPS

show running-config chassis
show chassis
show sdr default-sdr pairing
show redundancy summary
Remove a rack from the system.
show chassis
show sdr default-sdr pairing
show redundancy summary

DETAILED STEPS

	Command or Action	Purpose
Step 1	show running-config chassis Example: `sysadmin-vm:F1_SC0# show running-config chassis chassis serial FLM171662RX rack 0 ! chassis serial FLM171762WW rack 1 ! chassis serial FLM171763M4 rack 2 ! chassis serial FMP12020039 rack 3 ! chassis serial FMP17260280 rack F1`	Display the current configuration of the chassis.
Step 2	show chassis Example: `sysadmin-vm:F1_SC0# show chassis Serial Num Rack Num Rack Type Rack State Data Plane Ctrl Plane ---------------------------------------------------------------------------------------------- FLM171662RX 0 LCC UP CONN CONN FLM171762WW 1 LCC UP CONN CONN FLM171763M4 2 LCC UP CONN CONN FMP12020039 3 LCC UP CONN CONN FMP17260280 F1 FCC UP CONN CONN`	Display the racks and their states.
Step 3	show sdr default-sdr pairing Example: `sysadmin-vm:2_RP0# show sdr default-sdr pairing Pairing Mode INTER-RACK SDR Lead Node 0 0/RP0 Node 1 1/RP1 Pairs Pair Name Pair0 Node 0 0/RP0 Node 1 1/RP1 Pairs Pair Name Pair1 Node 0 1/RP0 Node 1 2/RP1 Pairs Pair Name Pair2 Node 0 2/RP0 Node 1 3/RP1 Pairs Pair Name Pair3 Node 0 3/RP0 Node 1 0/RP1`	View the current active and standby pairing of RPs.
Step 4	show redundancy summary Example: `Router#show redundancy summary Active Node Standby Node ----------- ------------ 1/RP0/CPU0 2/RP1/CPU0 (Node Ready, NSR:Ready) 2/RP0/CPU0 3/RP1/CPU0 (Node Ready, NSR:Ready) 3/RP0/CPU0 0/RP1/CPU0 (Node Ready, NSR:Ready) 0/RP0/CPU0 1/RP1/CPU0 (Node Ready, NSR:Ready)`	Verify node status and pairing.
Step 5	Remove a rack from the system.
Step 6	show chassis Example: `sysadmin-vm:F1_SC0# show chassis Serial Num Rack Num Rack Type Rack State Data Plane Ctrl Plane ---------------------------------------------------------------------------------------------- FLM171662RX 0 LCC UP CONN CONN FLM171763M4 2 LCC UP CONN CONN FMP12020039 3 LCC UP CONN CONN FMP17260280 F1 FCC UP CONN CONN`	Show the chassis configuration. Observe that rack 1 is deleted from the configuration.
Step 7	show sdr default-sdr pairing Example: `sysadmin-vm:2_RP0# show sdr default-sdr pairing Pairing Mode INTER-RACK SDR Lead Node 0 0/RP0 Node 1 2/RP1 Pairs Pair Name Pair0 Node 0 0/RP0 Node 1 2/RP1 Pairs Pair Name Pair2 Node 0 2/RP0 Node 1 3/RP1 Pairs Pair Name Pair3 Node 0 3/RP0 Node 1 0/RP1`	Display the recalculated pairing configuration. Observe that the deleted rack is not included in the new pairing. The XR VMs must reflect the SDR pairing of the RPs.
Step 8	show redundancy summary Example: `Router#show redundancy summary Active Node Standby Node ----------- ------------ 2/RP0/CPU0 3/RP1/CPU0 (Node Ready, NSR:Ready) 3/RP0/CPU0 0/RP1/CPU0 (Node Ready, NSR:Ready) 0/RP0/CPU0 2/RP1/CPU0 (Node Ready, NSR:Ready)`	Verify the node status and pairing.

Insert an RP Online to Create Dual RP

When an RP is inserted to a rack to create a chassis with dual RP, the re-pairing of RPs is automatically recalculated. The dual RP can be created using one of these methods.

Insert an RP

This task shows the automatic recalculation of pairing algorithm when an RP is added online to create a dual RP.

SUMMARY STEPS

show redundancy summary
Insert an RP. Consider that 2/RP0 is inserted.
show sdr default-sdr pairing

DETAILED STEPS

Command or Action Purpose

	Command or Action	Purpose
Step 1	show redundancy summary Example: `Active Node Standby Node ----------- ------------ 0/RP0/CPU0 1/RP1/CPU0 (Node Ready, NSR:Ready) 1/RP0/CPU0 0/RP1/CPU0 (Node Ready, NSR:Ready) 2/RP1/CPU0 N/A`	Verify node status and pairing. In the example, the standby RP 0/RP1 reloads to pair with 1/RP0.
Step 2	Insert an RP. Consider that 2/RP0 is inserted.
Step 3	show sdr default-sdr pairing Example: `sysadmin-vm:2_RP0# show sdr default-sdr pairing Pairing Mode INTER-RACK SDR Lead Node 0 0/RP0 Node 1 1/RP1 Pairs Pair Name Pair0 Node 0 0/RP0 Node 1 1/RP1 Pairs Pair Name Pair2 Node 0 1/RP0 Node 1 2/RP1 Pairs Pair Name Pair3 Node 0 2/RP0 Node 1 0/RP1 RP/0/RP0/CPU0:ios#show redundancy summary Active Node Standby Node ----------- ------------ 0/RP0/CPU0 1/RP1/CPU0 (Node Ready, NSR:Ready) 1/RP0/CPU0 2/RP1/CPU0 (Node Ready, NSR:Ready) 2/RP0/CPU0 0/RP1/CPU0 (Node Ready, NSR:Ready)`	Pairing is automatically recalculated to include rack 2. In the example, observe that 2/RP1 reloads to become the standby RP, and a third pair is created.

Step 1

show redundancy summary

Example:


    Active Node    Standby Node
    -----------    ------------
     0/RP0/CPU0      1/RP1/CPU0 (Node Ready, NSR:Ready)
     1/RP0/CPU0      0/RP1/CPU0 (Node Ready, NSR:Ready)
     2/RP1/CPU0      N/A

Verify node status and pairing. In the example, the standby RP 0/RP1 reloads to pair with 1/RP0.

Step 2

Insert an RP. Consider that 2/RP0 is inserted.

Step 3

show sdr default-sdr pairing

Example:

sysadmin-vm:2_RP0# show sdr default-sdr pairing 
 Pairing Mode  INTER-RACK
 SDR Lead
   Node 0 0/RP0
   Node 1 1/RP1
 Pairs
   Pair Name Pair0
    Node 0   0/RP0
    Node 1   1/RP1
 Pairs
   Pair Name Pair2
    Node 0   1/RP0
    Node 1   2/RP1
 Pairs
   Pair Name Pair3
    Node 0   2/RP0
    Node 1   0/RP1

RP/0/RP0/CPU0:ios#show redundancy summary
    Active Node    Standby Node
    -----------    ------------
     0/RP0/CPU0      1/RP1/CPU0 (Node Ready, NSR:Ready)
     1/RP0/CPU0      2/RP1/CPU0 (Node Ready, NSR:Ready)
     2/RP0/CPU0      0/RP1/CPU0 (Node Ready, NSR:Ready)

Pairing is automatically recalculated to include rack 2. In the example, observe that 2/RP1 reloads to become the standby RP, and a third pair is created.

Add an RP to a Named SDR

This task shows the automatic recalculation of pairing algorithm when an RP is added to a named SDR.

SUMMARY STEPS

show running-config sdr
show sdr newsdra pairing
conf
sdr newsdra location 1/RP1
show running-config sdr
show sdr newsdra pairing

DETAILED STEPS

	Command or Action	Purpose
Step 1	show running-config sdr Example: `sysadmin-vm:F1_SC0# show running-config sdr newsdra pairing-mode inter-rack location 0/RP0 ! location 0/RP1 ! location 1/RP0 ! location 2/RP1 ! !`	Display the current configuration of the named SDR.
Step 2	show sdr newsdra pairing Example: `sysadmin-vm:2_RP0# show sdr newsdra pairing Pairing Mode INTER-RACK SDR Lead Node 0 0/RP0 Node 1 0/RP1 Pairs Pair Name Pair0 Node 0 0/RP0 Node 1 0/RP1 Pairs Pair Name Pair2 Node 0 1/RP0 Node 1 NONE Pairs Pair Name Pair3 Node 0 2/RP1 Node 1 NONE`	Observe that rack 1 and rack 2 are not included in pairing because both the racks have a single RP. Inter-rack pairing does not support racks with single RP.
Step 3	conf Example: `sysadmin-vm:F1_SC0# conf Entering configuration mode terminal`	Enter the configuration mode.
Step 4	sdr newsdra location 1/RP1 Example: `sysadmin-vm:F1_SC0(config)# sdr newsdra location 1/RP1 sysadmin-vm:F1_SC0(config-location-1/RP1)# commit Commit complete.`	Add `1/RP1` to the SDR configuration, and commit the configuration.
Step 5	show running-config sdr Example: `sysadmin-vm:F1_SC0# show running-config sdr sdr newsdra pairing-mode inter-rack location 0/RP0 ! location 0/RP1 ! location 1/RP0 ! location 1/RP1 ! location 2/RP1 ! !`	View the updated rack details in the SDR configuration.
Step 6	show sdr newsdra pairing Example: `sysadmin-vm:2_RP0# show sdr newsdra pairing Pairing Mode INTER-RACK SDR Lead Node 0 0/RP0 Node 1 1/RP1 Pairs Pair Name Pair0 Node 0 0/RP0 Node 1 1/RP1 Pairs Pair Name Pair2 Node 0 1/RP0 Node 1 0/RP1 Pairs Pair Name Pair3 Node 0 2/RP1 Node 1 NONE`	Verify the re-paired algorithm. The algorithm has automatically recaluculated to include rack 1 in the pairing.

Use Case: Manual Re-pairing Algorithm

Rack Failure

A re-pair of the RPs can be initiated manually when a rack is not functional. This will re-establish rack level high availability (HA). A rack failure may occur during one or more of these circumstances:

simultaneous hardware or software failure on both RPs in the rack
simultaneous loss of ethernet connectivity from rest of the system on both RPs in the rack
isolation of rack due to fiber cuts
power failure

HA can be re-established by triggering re-calculation of pairing within a maintenance window. This can be done by:

removing the affected rack from the system by deleting it from the chassis configuration using no chassis serial <chassis-serial-number> command
shutting down the rack and running re-pair manually

This section shows the steps for shutting down the rack and running the re-pair manually:

SUMMARY STEPS

show chassis
show running-config chassis
show sdr default-sdr pairing
sdr default-sdr re_pair
show chassis
show running-config chassis
show sdr default-sdr pairing

DETAILED STEPS

	Command or Action	Purpose
Step 1	show chassis Example: `sysadmin-vm:F1_SC0# show chassis Serial Num Rack Num Rack Type Rack State Data Plane Ctrl Plane -------------------------------------------------------------------------- FLM171662RX 0 LCC UP CONN CONN FLM171762WW 1 LCC DOWN CONN CONN FLM171763M4 2 LCC UP CONN CONN`	Show the current chassis configuration. Note that rack 1 has failed and is in DOWN state.
Step 2	show running-config chassis Example: `sysadmin-vm:2_RP0# show running-config chassis chassis serial FLM171662RX rack 0 ! chassis serial FLM171762WW rack 1 ! chassis serial FLM171763M4 rack 2`	Display the current running configuration of the chassis.
Step 3	show sdr default-sdr pairing Example: `sysadmin-vm:2_RP0# show sdr default-sdr pairing Pairing Mode INTER-RACK SDR Lead Node 0 0/RP0 Node 1 1/RP1 Pairs Pair Name Pair0 Node 0 0/RP0 Node 1 1/RP1 Pairs Pair Name Pair1 Node 0 1/RP0 Node 1 2/RP1 Pairs Pair Name Pair2 Node 0 2/RP0 Node 1 0/RP1`	Display the current pairing algorithm of RPs.
Step 4	sdr default-sdr re_pair Example: `sysadmin-vm:0_RP0# sdr default-sdr re_pair Current Configuration Lead Pair: 0/RP0 1/RP1 1/RP0 2/RP1 2/RP0 0/RP1 Re_Paired Configuration Lead Pair: 0/RP0 2/RP1 2/RP0 0/RP1 Would you like to proceed ? [yes/no]: yes Proceeding with action`	Remove rack 1 from the configuration.
Step 5	show chassis Example: `sysadmin-vm:F1_SC0# show chassis Serial Num Rack Num Rack Type Rack State Data Plane Ctrl Plane -------------------------------------------------------------------------- FLM171662RX 0 LCC UP CONN CONN FLM171762WW 1 LCC DOWN CONN CONN FLM171763M4 2 LCC UP CONN CONN`	Display the chassis configuration details.
Step 6	show running-config chassis Example: `sysadmin-vm:2_RP0# show running-config chassis chassis serial FLM171662RX rack 0 ! chassis serial FLM171762WW rack 1 ! chassis serial FLM171763M4 rack 2`	Show the current running configuration of the chassis. Observe that the chassis configuration is unchanged.
Step 7	show sdr default-sdr pairing Example: `sysadmin-vm:2_RP0# show sdr default-sdr pairing Pairing Mode INTER-RACK SDR Lead Node 0 0/RP0 Node 1 2/RP1 Pairs Pair Name Pair0 Node 0 0/RP0 Node 1 2/RP1 Pairs Pair Name Pair1 Node 0 2/RP0 Node 1 0/RP1`	Display the SDR pairing algorithm. The SDR configuration is updated to exclude rack 1.

Remove RP

This task shows manually intitiating the recalculation of pairing algorithm when an RP is removed using online insertion and removal (OIR).

SUMMARY STEPS

show sdr default-sdr pairing
show redundancy summary
Remove an RP using OIR. For example, consider 0/RP0 is removed from the chassis.
show redundancy summary and show sdr default-sdr pairing
sdr default-sdr re_pair
show sdr default-sdr pairing

DETAILED STEPS

	Command or Action	Purpose
Step 1	show sdr default-sdr pairing Example: `sysadmin-vm:3_RP1# show sdr default-sdr pairing Pairing Mode INTER-RACK SDR Lead Node 0 0/RP0 Node 1 0/RP1 Pairs Pair Name Pair0 Node 0 0/RP0 Node 1 1/RP1 Pairs Pair Name Pair1 Node 0 1/RP0 Node 1 0/RP1`	Display the pairing of RPs in the SDR configuration.
Step 2	show redundancy summary Example: `Router#show redundancy summary Active Node Standby Node ----------- ------------ 0/RP0/CPU0 1/RP1/CPU0 1/RP0/CPU0 0/RP1/CPU0 (Node Ready, NSR:Ready)`
Step 3	Remove an RP using OIR. For example, consider 0/RP0 is removed from the chassis.
Step 4	show redundancy summary and show sdr default-sdr pairing Example: `Router#show redundancy summary Active Node Standby Node ----------- ------------ 1/RP1/CPU0 N/A 1/RP0/CPU0 0/RP1/CPU0 (Node Ready, NSR:Ready) sysadmin-vm:3_RP1# show sdr default-sdr pairing Pairing Mode INTER-RACK SDR Lead Node 0 0/RP0 Node 1 1/RP1 Pairs Pair Name Pair0 Node 0 0/RP0 Node 1 1/RP1 Pairs Pair Name Pair1 Node 0 1/RP0 Node 1 0/RP1`	Observe the mismatch between the SDR configuration and the actual state of the nodes.
Step 5	sdr default-sdr re_pair Example: `sysadmin-vm:2_RP0# sdr default-sdr re_pair Current Configuration Lead Pair: 0/RP0 1/RP1 1/RP0 0/RP1 Re_Paired Configuration Lead Pair: 1/RP1 N/A 0/RP0 0/RP1 Would you like to proceed ? [yes/no]: yes Proceeding with action`	Use the re-pair command to solve the mismatch between SDR configuration and state of the nodes.
Step 6	show sdr default-sdr pairing Example: `sysadmin-vm:2_RP0# show sdr default-sdr pairing Pairing Mode INTER-RACK SDR Lead Node 0 1/RP1 Node 1 N/A Pairs Pair Name Pair0 Node 0 1/RP1 Node 1 N/A Pairs Pair Name Pair1 Node 0 0/RP0 Node 1 0/RP1`	Verify that the SDR configuration shows the correct pairing on RPs.

Remove RP from SDR Configuration

This task shows manually initiating the recalculation of pairing algorithm when an RP is removed from SDR configuration.

SUMMARY STEPS

show running-config sdr abc
sh sdr
show sdr abc pairing
show redundancy summary
conf
sdr abc
no location 1/RP1
show running-config sdr abc
show sdr abc pairing
sdr abc re_pair
show sdr abc pairing
show sdr abc reboot-history

DETAILED STEPS

	Command or Action	Purpose
Step 1	show running-config sdr abc Example: `sysadmin-vm:0_RP0# show running-config sdr abc sdr abc pairing-mode inter-rack location 0/RP0 ! location 0/RP1 ! location 1/RP0 ! location 1/RP1 ! !`	Display current SDR configuration.
Step 2	sh sdr Example: sysadmin-vm:0_RP0# sh sdr SDR: abc Location IP Address Status Boot Count Time Started ----------------------------------------------------------------------------- 0/RP0/VM1 192.3.0.4 RUNNING 1 06/26/2017 21:02:23 0/RP1/VM1 192.3.4.4 RUNNING 1 06/26/2017 21:03:09 1/RP0/VM1 192.2.0.4 RUNNING 1 06/26/2017 21:03:26 1/RP1/VM1 192.2.4.4 RUNNING 1 06/26/2017 21:03:36 SDR: abcabc Location IP Address Status Boot Count Time Started ----------------------------------------------------------------------------- 1/RP0/VM2 192.2.0.6 RUNNING 1 06/26/2017 21:14:29 1/RP1/VM2 192.2.4.6 RUNNING 1 06/26/2017 21:14:37 3/RP0/VM1 192.1.0.4 RUNNING 1 06/26/2017 21:14:01 3/RP1/VM1 192.1.4.4 RUNNING 1 06/26/2017 21:15:31 SDR: xyz Location IP Address Status Boot Count Time Started ----------------------------------------------------------------------------- 0/RP0/VM2 192.3.0.6 RUNNING 1 06/26/2017 21:04:15 0/RP1/VM2 192.3.4.6 RUNNING 1 06/26/2017 21:04:38	Display SDR configuration details.
Step 3	show sdr abc pairing Example: `sysadmin-vm:0_RP0# show sdr abc pairing Pairing Mode INTER-RACK SDR Lead Node 0 0/RP0 Node 1 1/RP1 Pairs Pair Name Pair0 Node 0 0/RP0 Node 1 1/RP1 Pairs Pair Name Pair1 Node 0 1/RP0 Node 1 0/RP1`	Verify that inter-rack mode is enabled in the SDR, and the pairing is displayed.
Step 4	show redundancy summary Example: `RP/0/RP0/CPU1:ios#show redundancy summary Active Node Standby Node ----------- ------------ 0/RP1/CPU1 1/RP0/CPU1 (Node Ready, NSR:Not Configured) 0/RP0/CPU1 1/RP1/CPU1 (Node Ready, NSR:Not Configured)`	Disolay summary of the nodes states.
Step 5	conf Example: `sysadmin-vm:0_RP0# conf Entering configuration mode terminal`	Enter configuration mode.
Step 6	sdr abc Example: `sysadmin-vm:0_RP0(config)# sdr abc`	Enter SDR configuration mode.
Step 7	no location 1/RP1 Example: `sysadmin-vm:0_RP0(config-sdr-abc)# no location 1/RP1 sysadmin-vm:0_RP0(config-sdr-abc)# end Mon Jun 26 21:18:32.448 UTC Uncommitted changes found, commit them? [yes/no/CANCEL] yes Commit complete.`	Remove the RP and commit the changes. In this example, the RP 1/RP1 is removed from the `abc` SDR configuration.
Step 8	show running-config sdr abc Example: `sysadmin-vm:0_RP0# show running-config sdr abc sdr abc pairing-mode inter-rack location 0/RP0 ! location 0/RP1 ! location 1/RP0 ! !`	Verify that the SDR inventory has changed.
Step 9	show sdr abc pairing Example: `sysadmin-vm:0_RP0# show sdr abc pairing Pairing Mode INTER-RACK SDR Lead Node 0 0/RP0 Node 1 1/RP1 Pairs Pair Name Pair0 Node 0 0/RP0 Node 1 1/RP1 Pairs Pair Name Pair1 Node 0 1/RP0 Node 1 0/RP1`	View the SDR pairing information after the RP is removed. Observe that pairing is unchanged with the removed RP available in the pairing algorithm. Note that the output of show running-config sdr command in step 8 is different from the output in step 9.
Step 10	sdr abc re_pair Example: `sysadmin-vm:0_RP0# sdr abc re_pair Current Configuration Lead Pair: 0/RP0 1/RP1 1/RP0 0/RP1 Re_Paired Configuration Lead Pair: 0/RP0 0/RP1 1/RP0 Would you like to proceed ? [yes/no]: yes Proceeding with action`	Manually initiate the recalculation of the pairing algorithm.
Step 11	show sdr abc pairing Example: `sysadmin-vm:0_RP0# show sdr abc pairing Pairing Mode INTER-RACK SDR Lead Node 0 0/RP0 Node 1 0/RP1 Pairs Pair Name Pair0 Node 0 0/RP0 Node 1 0/RP1 Pairs Pair Name Pair1 Node 0 1/RP0 Node 1 NONE`	Verify that the pairing is updated to exclude the details of the RP that was removed. Also, run the show redundancy summary command to verify that the XR VMs reflect the changes.
Step 12	show sdr abc reboot-history Example: `sysadmin-vm:0_RP0# show sdr abc reboot-history Reboots Since Location Created Reason --------------------------------------------------------------------- 0/RP0/VM1 1 06/26/2017 21:02:23 FIRST_BOOT 0/RP1/VM1 2 6/26/2017 21:25:23 VM_REQUESTED_GRACEFUL_RELOAD: Src: node0_RP0_CPU1, Partner change from node1_RP1_CPU1 to node0_RP1_CPU1 06/26/2017 21:03:09 FIRST_BOOT 1/RP0/VM1 1 06/26/2017 21:03:26 FIRST_BOOT`	Verify the reboot history of the SDR nodes. The history reflects the changes made to the configuration.

Process Placement after a Pairing Change

You must check the placement reoptimization of configuration before and after a change in pairing algorithm. This maintains HA for configurable processes.This includes moving to inter-rack or intra-rack pairing, running a manual re-pair, or triggering an automatic re_pair scenario. This feature provides the flexibility to decide a change in service placements based on the prediction from process placement.

SUMMARY STEPS

show redundancy summary
show placement reoptimize
placement reoptimize
show placement reoptimize

DETAILED STEPS

	Command or Action	Purpose
Step 1	show redundancy summary Example: `RP/0/RP0/CPU1:ios#show redundancy summary Active Node Standby Node ----------- ------------ 1/RP0/CPU1 N/A 0/RP0/CPU1 0/RP1/CPU1 (Node Ready, NSR:Configured)`	Display the summary of nodes on the configuration.
Step 2	show placement reoptimize Example: Router#show placement reoptimize --------------------------------------------------------------------------- Group-Name Current-Placement Reoptimized-Placement --------------------------------------------------------------------------- central-services 0/RP0/CPU1(0/RP1/CPU1) 0/RP0/CPU1(0/RP1/CPU1) v4-routing 1/RP0/CPU1(NONE) 0/RP0/CPU1(0/RP1/CPU1) netmgmt 1/RP0/CPU1(NONE) 0/RP0/CPU1(0/RP1/CPU1) mcast-routing 0/RP0/CPU1(0/RP1/CPU1) 0/RP0/CPU1(0/RP1/CPU1) v6-routing 1/RP0/CPU1(NONE) 0/RP0/CPU1(0/RP1/CPU1) Group_0_1 0/RP0/CPU1(0/RP1/CPU1) 0/RP0/CPU1(0/RP1/CPU1) Group_0_0 1/RP0/CPU1(NONE) 0/RP0/CPU1(0/RP1/CPU1)	Show current placements and reoptimized placements of services.
Step 3	placement reoptimize Example: RP/0/RP0/CPU1:ios#placement reoptimize --------------------------------------------------------------------------- Group-Name Current-Placement Reoptimized-Placement --------------------------------------------------------------------------- central-services 0/RP0/CPU1(0/RP1/CPU1) 0/RP0/CPU1(0/RP1/CPU1) v4-routing 1/RP0/CPU1(NONE) 0/RP0/CPU1(0/RP1/CPU1) netmgmt 1/RP0/CPU1(NONE) 0/RP0/CPU1(0/RP1/CPU1) mcast-routing 0/RP0/CPU1(0/RP1/CPU1) 0/RP0/CPU1(0/RP1/CPU1) v6-routing 1/RP0/CPU1(NONE) 0/RP0/CPU1(0/RP1/CPU1) Group_0_1 0/RP0/CPU1(0/RP1/CPU1) 0/RP0/CPU1(0/RP1/CPU1) Group_0_0 1/RP0/CPU1(NONE) 0/RP0/CPU1(0/RP1/CPU1) --------------------------------------------------------------------------- Do you want to proceed with the reoptimization[y/n]y Triggering reoptimize Migration running in the background Please don't trigger one more migration	Display the placement reoptimize details.
Step 4	show placement reoptimize Example: Router#show placement reoptimize --------------------------------------------------------------------------- Group-Name Current-Placement Reoptimized-Placement --------------------------------------------------------------------------- central-services 0/RP0/CPU1(0/RP1/CPU1) 0/RP0/CPU1(0/RP1/CPU1) v4-routing 0/RP0/CPU1(0/RP1/CPU1) 0/RP0/CPU1(0/RP1/CPU1) netmgmt 0/RP0/CPU1(0/RP1/CPU1) 0/RP0/CPU1(0/RP1/CPU1) mcast-routing 0/RP0/CPU1(0/RP1/CPU1) 0/RP0/CPU1(0/RP1/CPU1) v6-routing 0/RP0/CPU1(0/RP1/CPU1) 0/RP0/CPU1(0/RP1/CPU1) Group_0_1 0/RP0/CPU1(0/RP1/CPU1) 0/RP0/CPU1(0/RP1/CPU1) Group_0_0 0/RP0/CPU1(0/RP1/CPU1) 0/RP0/CPU1(0/RP1/CPU1) --------------------------------------------------------------------------- No changes predicted. ---------------------------------------------------------------------------	Verify re-optimized placement matches the current placement and no more changes are predicted.

System Setup and Software Installation Guide for Cisco NCS 6000 Series Routers, IOS XR Release 7.2.x

Bias-Free Language

Results

Chapter: Enable Cross-rack Pairing

Enable Cross-rack Pairing

Verify System Readiness

Enable Inter-rack Pairing Mode

Before you begin

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Enable Inter-rack Pairing in Multi-SDR Configuration

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Manually Initiate Re-pair

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Use Cases for Re-pairing RP

Insert a Rack Online

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Remove a Rack from System

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Insert an RP Online to Create Dual RP

Insert an RP

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Add an RP to a Named SDR

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Rack Failure

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Remove RP