Getting error Field level validation errors: {value 0 of property arp_limit_per_lr has violated the minimum valid value 5000}

Products

• VMware NSX

Issue/Introduction

The purpose of this KB is to provide steps to change value of arp_limit_per_gateway field in global config.

While configuring TEP and RTEP MTU the following error may be seen- Field level validation errors: {value 0 of property arp_limit_per_lr has violated the minimum valid value 5000}” while changing Global MTU value to <value>.

Environment

VMware NSX-T Data Center

Cause

The error appears because ARP limit per gateway is set to a value below 5000.
See following document for values: Configure the ARP Limit of a Tier-0 or Tier-1 Gateway or Logical Router

Resolution

Check configured value using the following API GET https://nsx-mngr/policy/api/v1/infra/global-config
If arp_limit_per_gateway is set to less than minimum value, update it. The range for arp_limit_per_gateway is 5000 - 50000, default: 50000.

To update arp_limit_per_gateway value:

• Get current configuration values

GET https://<nsx-mngr-fqdn>/policy/api/v1/infra/global-config

If using CLI to run API call use cURL command -
curl -k -u admin -X GET https://<nsx-mngr-fqdn>/policy/api/v1/infra/global-config

• Copy the result from above GET API call and edit the value arp_limit_per_gateway. Use the result as payload and update using following API call-

PUT https://<nsx-mngr-fqdn>/policy/api/v1/infra/global-config

If using CLI to run API call use cURL command. Save the payload in a json file for e.g., config.json -
curl -k -u admin -X PUT -H "Content-Type: application/json" --data "@config.json" https://<nsx-mngr-fqdn>/policy/api/v1/infra/global-config

Sample payload:

{
    "mtu": 8800,
    "fips": {
        "lb_fips_enabled": false,
        "tls_fips_enabled": false
    },
    "l3_forwarding_mode": "IPV4_AND_IPV6",
    "uplink_mtu_threshold": 9000,
    "vdr_mac": "02:50:##:##:44:52",
    "vdr_mac_nested": "02:50:##:##:44:53",
    "allow_changing_vdr_mac_in_use": false,
    "arp_limit_per_gateway": 50000, <--------------
    "external_gateway_bfd": {
        "bfd_profile_path": "/infra/bfd-profiles/default-external-gw-bfd-profile",
        "enable": true
    },
    "lb_ecmp": false,
    "remote_tunnel_physical_mtu": 8900,
    "physical_uplink_mtu": 8900,
    "global_replication_mode_enabled": false,
    "resource_type": "GlobalConfig",
    "id": "global-config",
    "display_name": "default",
    "path": "/infra/global-config",
    "relative_path": "global-config",
    "parent_path": "/infra",
    "unique_id": "0d2a1ad5-####-####-a001-0ab0ff973ff7",
    "realization_id": "0d2a1ad5-####-####-a001-0ab0ff973ff7",
    "marked_for_delete": false,
    "overridden": false,
    "_create_time": 1677809301156,
    "_create_user": "system",
    "_last_modified_time": 1677810814969,
    "_last_modified_user": "admin",
    "_system_owned": false,
    "_protection": "NOT_PROTECTED",
    "_revision": 1
}