Configuration Guide for Cisco NCS 1004, IOS XR Release 25.x.x

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Configuration Guide for Cisco NCS 1004, IOS XR Release 25.x.x

FlexO GID and IID overview

Updated: July 31, 2026

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This section explains explains how Flexible OTN (FlexO) Group Identifications (GIDs) and Instance Identifications (IIDs) enable flexible grouping and unique identification of interfaces on OTN-XP and QXP cards for the NCS 1004.

A FlexO GID and IID is a grouping and identification mechanism that

  • enables grouping of standard lower-rate FlexO interfaces for the transport of OTUCn signals,

  • provides a mechanism to uniquely distinguish both FlexO interface groups (GIDs) and their individual members (IIDs), and

  • ensures interoperability and configuration flexibility on trunk ports of OTN-XP and QXP cards for the NCS 1004.

In the 4x100G-MXP-400G-TXP LC mode, the OTN-XP card uses flexible OTN (flexO) interfaces on trunk ports. These flexO interfaces provide a flexible and interoperable mechanism to transport OTUCn signals by grouping standard lower rate interfaces. Each flexO interface group is identified by a flexO group identification (GID) number, which ranges 1–1,048,576. Each member of a flexO group is identified by a flexO instance identification (IID) number, which ranges 1–254.

From Release 7.3.1, FlexO GID and IID configurations are supported on the CoherentDSP controller for the OTN-XP card.

From Release 7.10.1, FlexO GID and IID configurations are supported on the CoherentDSP controller for the QXP card.

Configure FlexO GID and IID

Configure FlexO GID and IID parameters on a CoherentDSP controller for your OTN-XP card to support correct trunk bandwidth and controller operation.
Note

Configure the IID number based on the trunk bandwidth. Add 1, 2, 3, or 4 IID numbers for 100G, 200G, 300G, and 400G trunk bandwidth, respectively. For 400G inverse muxponder, the GID must be the same on both port 12 and port 13, and the IIDs must be in incremental order.

Follow these steps to configure and verify FlexO GID and IID on CoherentDSP controllers:

Procedure

1.

Run the configure controller coherentDSP flexo gid<gid-no> iid <iid-no> command to configure flexO GID and IID on the coherentDSP controller.

Note

You must configure the iid number based on the trunk bandwidth. You must add 1, 2, 3, and 4 iid numbers for 100G, 200G, 300G, and 400G respectively.

Example:

This sample shows how to configure flexO GID and IID on the CoherentDSP controller:


RP/0/RP0/CPU0:ios#configure
RP/0/RP0/CPU0:ios(config)#controller coherentDSP0/2/0/12
RP/0/RP0/CPU0:ios(config-CoDSP)#flexo
RP/0/RP0/CPU0:ios(config-CoDSP)#gid 2 iid 5,6,7,8
RP/0/RP0/CPU0:ios(config-CoDSP)#commit
2.

Run the show controllers coherentDSP command to verify the FlexO GID and IID.

Example:

This sample shows the flexO GID and IID configuration on the CoherentDSP controller.


RP/0/RP0/CPU0:ios#show controllers coherentDSP 0/2/0/12                                                                                    
Tue Jan 12 11:26:08.235 UTC  
Port : CoherentDSP 0/2/0/12
Controller State : Up
Inherited Secondary State : Normal
Configured Secondary State : Normal
Derived State : In Service
Loopback mode : None
BER Thresholds : SF = 1.0E-5 SD = 1.0E-7
Performance Monitoring : Enable
Bandwidth : 400.0Gb/s

Alarm Information:
LOS = 0 LOF = 3 LOM = 0
OOF = 3 OOM = 0 AIS = 0
IAE = 0 BIAE = 0 SF_BER = 0
SD_BER = 0 BDI = 0 TIM = 0
FECMISMATCH = 0 FEC-UNC = 0 FLEXO_GIDM = 1
FLEXO-MM = 1 FLEXO-LOM = 0 FLEXO-RDI = 3
FLEXO-LOF = 0 
Detected Alarms : None

Bit Error Rate Information
PREFEC BER : 6.43E-04 
POSTFEC BER : 0.00E+00 

TTI :
Remote hostname : ios
Remote interface : CoherentDSP 0/0/0/13
Remote IP addr : 0.0.0.0

FEC mode : O_FEC

Flexo-Mode : Enable
Flexo Details:
Tx GID : 2
TX IID : 5,6,7,8, 
Rx GID : 2
RX IID 5,6,7,8, 

AINS Soak : None
AINS Timer : 0h, 0m
AINS remaining time : 0 seconds

The FlexO GID and IID are configured. You can confirm correct values in the Flexo Details section of the controller output.