Hi Paul,
On QFX-5100, I think we don't support classifier and rewrite configuration on logical unit. We only support it only physical interface, that's why I think you are getting commit error, please refer to following link:
Ethernet Interface Support for Most QFX Series Switches, and QFabric Systems
You cannot apply classifiers or rewrite rules to Layer 2 physical interfaces or to Layer 3 logical interfaces. Table 2 shows on which interfaces you can configure and apply classifiers and rewrite rules.
Table 2: Ethernet Interface Support for Classifier and Rewrite Rule Configuration (QFX5100, QFX5200, EX4600, QFX3500, and QFX3600 Switches, and QFabric Systems)
CoS Classifiers and Rewrite Rules | Layer 2 Physical Interfaces | Layer 2 Logical Interface (Unit 0 Only) | Layer 3 Physical Interfaces (If at Least One Logical Layer 3 Interface Is Defined) | Layer 3 Logical Interfaces |
|---|---|---|---|---|
Fixed classifier | No | Yes | Yes | No |
DSCP classifier | No | Yes | Yes | No |
DSCP IPv6 classifier | No | Yes | Yes | No |
IEEE 802.1p classifier | No | Yes | Yes | No |
EXP classifier | Global classifier, applies only to all switch interfaces that are configured as family mpls. Cannot be configured on individual interfaces. | |||
DSCP rewrite rule | No | Yes | Yes | No |
DSCP IPv6 rewrite rule | No | Yes | Yes | No |
IEEE 802.1p rewrite rule | No | Yes | Yes | No |
EXP rewrite rule | No | Yes | Yes | No |
Hope this helps
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