diff --git a/specification/redis/resource-manager/Microsoft.Cache/stable/2020-12-01/redis.json b/specification/redis/resource-manager/Microsoft.Cache/stable/2020-12-01/redis.json
index c5ba986b1cc3..14263551ae35 100644
--- a/specification/redis/resource-manager/Microsoft.Cache/stable/2020-12-01/redis.json
+++ b/specification/redis/resource-manager/Microsoft.Cache/stable/2020-12-01/redis.json
@@ -1964,6 +1964,17 @@
         },
         "subnetId": {
           "type": "string",
+          "format": "arm-id",
+          "x-ms-arm-id-details": {
+            "allowedResources": [
+              {
+                "type": "Microsoft.Network/virtualNetworks/subnets"
+              },
+              {
+                "type": "Microsoft.ClassicNetwork/virtualNetworks/subnets"
+              }
+            ]
+          },
           "pattern": "^/subscriptions/[^/]*/resourceGroups/[^/]*/providers/Microsoft.(ClassicNetwork|Network)/virtualNetworks/[^/]*/subnets/[^/]*$",
           "description": "The full resource ID of a subnet in a virtual network to deploy the Redis cache in. Example format: /subscriptions/{subscriptionId}/resourceGroups/{resourceGroupName}/Microsoft.{Network|ClassicNetwork}/VirtualNetworks/vnet1/subnets/subnet1"
         },
@@ -2548,6 +2559,14 @@
       "properties": {
         "linkedRedisCacheId": {
           "type": "string",
+          "format": "arm-id",
+          "x-ms-arm-id-details": {
+            "allowedResources": [
+              {
+                "type": "Microsoft.Cache/Redis"
+              }
+            ]
+          },
           "description": "Fully qualified resourceId of the linked redis cache."
         },
         "linkedRedisCacheLocation": {
diff --git a/specification/redis/resource-manager/Microsoft.Cache/stable/2021-06-01/redis.json b/specification/redis/resource-manager/Microsoft.Cache/stable/2021-06-01/redis.json
index c837ed5e377e..be6fef3a0a54 100644
--- a/specification/redis/resource-manager/Microsoft.Cache/stable/2021-06-01/redis.json
+++ b/specification/redis/resource-manager/Microsoft.Cache/stable/2021-06-01/redis.json
@@ -2019,6 +2019,17 @@
         },
         "subnetId": {
           "type": "string",
+          "format": "arm-id",
+          "x-ms-arm-id-details": {
+            "allowedResources": [
+              {
+                "type": "Microsoft.Network/virtualNetworks/subnets"
+              },
+              {
+                "type": "Microsoft.ClassicNetwork/virtualNetworks/subnets"
+              }
+            ]
+          },
           "pattern": "^/subscriptions/[^/]*/resourceGroups/[^/]*/providers/Microsoft.(ClassicNetwork|Network)/virtualNetworks/[^/]*/subnets/[^/]*$",
           "description": "The full resource ID of a subnet in a virtual network to deploy the Redis cache in. Example format: /subscriptions/{subscriptionId}/resourceGroups/{resourceGroupName}/Microsoft.{Network|ClassicNetwork}/VirtualNetworks/vnet1/subnets/subnet1"
         },
@@ -2618,6 +2629,14 @@
       "properties": {
         "linkedRedisCacheId": {
           "type": "string",
+          "format": "arm-id",
+          "x-ms-arm-id-details": {
+            "allowedResources": [
+              {
+                "type": "Microsoft.Cache/Redis"
+              }
+            ]
+          },
           "description": "Fully qualified resourceId of the linked redis cache."
         },
         "linkedRedisCacheLocation": {