diff --git a/app/pages/system/silos/SiloIpPoolsTab.tsx b/app/pages/system/silos/SiloIpPoolsTab.tsx
index 7750d816c..cbb7b13dc 100644
--- a/app/pages/system/silos/SiloIpPoolsTab.tsx
+++ b/app/pages/system/silos/SiloIpPoolsTab.tsx
@@ -24,6 +24,7 @@ import {
 import { Networking24Icon } from '@oxide/design-system/icons/react'
 import { Badge } from '@oxide/design-system/ui'
 
+import { CheckboxField } from '~/components/form/fields/CheckboxField'
 import { ComboboxField } from '~/components/form/fields/ComboboxField'
 import { HL } from '~/components/HL'
 import { IpVersionBadge } from '~/components/IpVersionBadge'
@@ -263,9 +264,10 @@ export const handle = makeCrumb('IP Pools')
 
 type LinkPoolFormValues = {
   pool: string | undefined
+  isDefault: boolean
 }
 
-const defaultValues: LinkPoolFormValues = { pool: undefined }
+const defaultValues: LinkPoolFormValues = { pool: undefined, isDefault: false }
 
 function LinkPoolModal({ onDismiss }: { onDismiss: () => void }) {
   const { silo } = useSiloSelector()
@@ -282,9 +284,9 @@ function LinkPoolModal({ onDismiss }: { onDismiss: () => void }) {
     },
   })
 
-  function onSubmit({ pool }: LinkPoolFormValues) {
+  function onSubmit({ pool, isDefault }: LinkPoolFormValues) {
     if (!pool) return // can't happen, silo is required
-    linkPool.mutate({ path: { pool }, body: { silo, isDefault: false } })
+    linkPool.mutate({ path: { pool }, body: { silo, isDefault } })
   }
 
   const allLinkedPools = useQuery(allSiloPoolsQuery(silo).optionsFn())
@@ -334,6 +336,10 @@ function LinkPoolModal({ onDismiss }: { onDismiss: () => void }) {
               required
               control={control}
             />
+
+            <CheckboxField name="isDefault" control={control}>
+              Make default IP pool for silo
+            </CheckboxField>
           </form>
         </Modal.Section>
       </Modal.Body>
diff --git a/app/pages/system/silos/SiloSubnetPoolsTab.tsx b/app/pages/system/silos/SiloSubnetPoolsTab.tsx
index 349d42fb4..23bc07c98 100644
--- a/app/pages/system/silos/SiloSubnetPoolsTab.tsx
+++ b/app/pages/system/silos/SiloSubnetPoolsTab.tsx
@@ -24,6 +24,7 @@ import {
 import { Networking24Icon } from '@oxide/design-system/icons/react'
 import { Badge } from '@oxide/design-system/ui'
 
+import { CheckboxField } from '~/components/form/fields/CheckboxField'
 import { ComboboxField } from '~/components/form/fields/ComboboxField'
 import { HL } from '~/components/HL'
 import { IpVersionBadge } from '~/components/IpVersionBadge'
@@ -252,9 +253,10 @@ export const handle = makeCrumb('Subnet Pools')
 
 type LinkPoolFormValues = {
   pool: string | undefined
+  isDefault: boolean
 }
 
-const defaultValues: LinkPoolFormValues = { pool: undefined }
+const defaultValues: LinkPoolFormValues = { pool: undefined, isDefault: false }
 
 function LinkPoolModal({ onDismiss }: { onDismiss: () => void }) {
   const { silo } = useSiloSelector()
@@ -271,9 +273,9 @@ function LinkPoolModal({ onDismiss }: { onDismiss: () => void }) {
     },
   })
 
-  function onSubmit({ pool }: LinkPoolFormValues) {
+  function onSubmit({ pool, isDefault }: LinkPoolFormValues) {
     if (!pool) return
-    linkPool.mutate({ path: { pool }, body: { silo, isDefault: false } })
+    linkPool.mutate({ path: { pool }, body: { silo, isDefault } })
   }
 
   const allLinkedPools = useQuery(allSiloPoolsQuery(silo).optionsFn())
@@ -320,6 +322,10 @@ function LinkPoolModal({ onDismiss }: { onDismiss: () => void }) {
               required
               control={control}
             />
+
+            <CheckboxField name="isDefault" control={control}>
+              Make default subnet pool for silo
+            </CheckboxField>
           </form>
         </Modal.Section>
       </Modal.Body>