catalystcenter_ip_pool_reservation incorrectly trigger update on pool with ipv6

[jolstorn]

If a reserved pool has dual stack ipv4 and ipv6 assigned, catalystcenter_ip_pool_reservation will update the resource each run.

  # catalystcenter_ip_pool_reservation.pool_reserved["prep_siteb_borderlink"] will be updated in-place
  ~ resource "catalystcenter_ip_pool_reservation" "pool_reserved" {
        id                 = "17c55d35-d5dd-4d61-9cbd-bc0a64585ac4"
      ~ ipv4_gateway       = "2a05:ec0:cf01:100::201" -> "100.126.24.1"
        name               = "prep_siteb_borderlink"
        # (13 unchanged attributes hidden)
    }

Plan: 0 to add, 1 to change, 0 to destroy.

This happens even though state shows normal values:

[ghrunner@sds-iacmt-01 tf-dnac]$ terraform state show 'catalystcenter_ip_pool_reservation.pool_reserved["prep_siteb_borderlink"]'
# catalystcenter_ip_pool_reservation.pool_reserved["prep_siteb_borderlink"]:
resource "catalystcenter_ip_pool_reservation" "pool_reserved" {
    id                 = "17c55d35-d5dd-4d61-9cbd-bc0a64585ac4"
    ipv4_dhcp_servers  = []
    ipv4_gateway       = "100.126.24.1"
    ipv4_global_pool   = "100.126.24.0/23"
    ipv4_prefix        = true
    ipv4_prefix_length = 23
    ipv4_subnet        = "100.126.24.0"
    ipv6_address_space = true
    ipv6_gateway       = "2a05:ec0:cf01:100::201"
    ipv6_global_pool   = "2a05:ec0:cf01:100::/119"
    ipv6_prefix        = true
    ipv6_prefix_length = 119
    ipv6_subnet        = "2a05:ec0:cf01:100::"
    name               = "prep_siteb_borderlink"
    site_id            = "beef9f65-83be-45fa-bb09-7ee0a1206d14"
    type               = "Generic"
}

Querying catcenter api also show normal values:

{
    "response": [
        {
            "id": "17c55d35-d5dd-4d61-9cbd-bc0a64585ac4",
            "groupName": "prep_siteb_borderlink",
            "ipPools": [
                {
                    "ipPoolName": "prep_siteb_borderlink",
                    "dhcpServerIps": [],
                    "gateways": [
                        "2a05:ec0:cf01:100::201"
                    ],
                    "createTime": 1713529113376,
                    "lastUpdateTime": 1733221320101,
                    "totalIpAddressCount": 512,
                    "usedIpAddressCount": 136,
                    "parentUuid": "a6fafa20-abc5-4f56-9c2f-1ddf220db871",
                    "owner": "DNAC",
                    "shared": true,
                    "overlapping": false,
                    "configureExternalDhcp": false,
                    "usedPercentage": "26",
                    "clientOptions": {},
                    "groupUuid": "17c55d35-d5dd-4d61-9cbd-bc0a64585ac4",
                    "unavailableIpAddressCount": 0,
                    "availableIpAddressCount": 0,
                    "totalAssignableIpAddressCount": 510,
                    "dnsServerIps": [],
                    "hasSubpools": false,
                    "defaultAssignedIpAddressCount": 2,
                    "context": [
                        {
                            "owner": "DNAC",
                            "contextKey": "reserved_by",
                            "contextValue": "DNAC"
                        },
                        {
                            "owner": "DNAC",
                            "contextKey": "siteId",
                            "contextValue": "beef9f65-83be-45fa-bb09-7ee0a1206d14"
                        },
                        {
                            "owner": "DNAC",
                            "contextKey": "slaacSupport",
                            "contextValue": "false"
                        }
                    ],
                    "ipv6": true,
                    "id": "1b09e145-d887-4c13-8059-ad99c067171b",
                    "ipPoolCidr": "2a05:ec0:cf01:100::200/119"
                },
                {
                    "ipPoolName": "prep_siteb_borderlink",
                    "dhcpServerIps": [],
                    "gateways": [
                        "100.126.24.1"
                    ],
                    "createTime": 1701160408661,
                    "lastUpdateTime": 1733221320098,
                    "totalIpAddressCount": 512,
                    "usedIpAddressCount": 136,
                    "parentUuid": "c673ac3b-e4b0-44bf-8388-3f5045855d54",
                    "owner": "DNAC",
                    "shared": true,
                    "overlapping": false,
                    "configureExternalDhcp": false,
                    "usedPercentage": "26",
                    "clientOptions": {},
                    "groupUuid": "17c55d35-d5dd-4d61-9cbd-bc0a64585ac4",
                    "unavailableIpAddressCount": 0,
                    "availableIpAddressCount": 0,
                    "totalAssignableIpAddressCount": 509,
                    "dnsServerIps": [],
                    "hasSubpools": false,
                    "defaultAssignedIpAddressCount": 3,
                    "context": [
                        {
                            "owner": "DNAC",
                            "contextKey": "siteId",
                            "contextValue": "beef9f65-83be-45fa-bb09-7ee0a1206d14"
                        },
                        {
                            "owner": "DNAC",
                            "contextKey": "reserved_by",
                            "contextValue": "DNAC"
                        }
                    ],
                    "ipv6": false,
                    "id": "16f0564f-d890-4050-9629-70d80c688dd5",
                    "ipPoolCidr": "100.126.24.0/23"
                }
            ],
            "siteId": "beef9f65-83be-45fa-bb09-7ee0a1206d14",
            "siteHierarchy": "Global/prep/siteb",
            "type": "generic",
            "groupOwner": "DNAC"
        }
    ],
    "version": "1.0"
}

The change is successful but will be repeated on next apply.

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catalystcenter_ip_pool_reservation.pool_reserved["prep_siteb_borderlink"]: Modifying... [id=17c55d35-d5dd-4d61-9cbd-bc0a64585ac4]
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catalystcenter_ip_pool_reservation.pool_reserved["prep_siteb_borderlink"]: Still modifying... [id=17c55d35-d5dd-4d61-9cbd-bc0a64585ac4, 10s elapsed]
catalystcenter_ip_pool_reservation.pool_reserved["prep_siteb_borderlink"]: Modifications complete after 17s [id=17c55d35-d5dd-4d61-9cbd-bc0a64585ac4]

Apply complete! Resources: 0 added, 1 changed, 0 destroyed.