diff --git a/packages/joint-core/src/dia/CellView.mjs b/packages/joint-core/src/dia/CellView.mjs
index 621fad69b..5d3ad6f4a 100644
--- a/packages/joint-core/src/dia/CellView.mjs
+++ b/packages/joint-core/src/dia/CellView.mjs
@@ -433,15 +433,20 @@ export const CellView = View.extend({
 
     getLinkEnd: function(magnet, ...args) {
 
-        var model = this.model;
-        var id = model.id;
-        var port = this.findAttribute('port', magnet);
+        const model = this.model;
+        const id = model.id;
+        // Find a node with the `port` attribute set on it.
+        const portNode = this.findAttributeNode('port', magnet);
         // Find a unique `selector` of the element under pointer that is a magnet.
-        var selector = magnet.getAttribute('joint-selector');
+        const selector = magnet.getAttribute('joint-selector');
 
-        var end = { id: id };
+        const end = { id: id };
         if (selector != null) end.magnet = selector;
-        if (port != null) {
+        if (portNode != null) {
+            let port = portNode.getAttribute('port');
+            if (portNode.getAttribute('port-id-type') === 'number') {
+                port = parseInt(port, 10);
+            }
             end.port = port;
             if (!model.hasPort(port) && !selector) {
                 // port created via the `port` attribute (not API)
diff --git a/packages/joint-core/src/dia/ports.mjs b/packages/joint-core/src/dia/ports.mjs
index d3186f0ca..a9ef05527 100644
--- a/packages/joint-core/src/dia/ports.mjs
+++ b/packages/joint-core/src/dia/ports.mjs
@@ -731,6 +731,13 @@ export const elementViewPortPrototype = {
             'port-group': port.group
         });
 
+        // If the port ID is a number, we need to add
+        // extra information to the port element to distinguish
+        // between ports with the same ID but different types.
+        if (util.isNumber(port.id)) {
+            portElement.attr('port-id-type', 'number');
+        }
+
         const labelMarkupDef = this._getPortLabelMarkup(port.label);
         if (Array.isArray(labelMarkupDef)) {
             // JSON Markup
diff --git a/packages/joint-core/src/mvc/View.mjs b/packages/joint-core/src/mvc/View.mjs
index 196461e1b..02ce8dcc9 100644
--- a/packages/joint-core/src/mvc/View.mjs
+++ b/packages/joint-core/src/mvc/View.mjs
@@ -63,23 +63,25 @@ export const View = ViewBase.extend({
         return this;
     },
 
-    findAttribute: function(attributeName, node) {
-
-        var currentNode = node;
-
+    findAttributeNode: function(attributeName, node) {
+        let currentNode = node;
         while (currentNode && currentNode.nodeType === 1) {
-            var attributeValue = currentNode.getAttribute(attributeName);
             // attribute found
-            if (attributeValue) return attributeValue;
+            // (empty value does not count as attribute found)
+            if (currentNode.getAttribute(attributeName)) return currentNode;
             // do not climb up the DOM
             if (currentNode === this.el) return null;
             // try parent node
             currentNode = currentNode.parentNode;
         }
-
         return null;
     },
 
+    findAttribute: function(attributeName, node) {
+        const matchedNode = this.findAttributeNode(attributeName, node);
+        return matchedNode && matchedNode.getAttribute(attributeName);
+    },
+
     // Override the mvc ViewBase `_ensureElement()` method in order to create an
     // svg element (e.g., `<g>`) node that wraps all the nodes of the Cell view.
     // Expose class name setter as a separate method.
diff --git a/packages/joint-core/test/jointjs/cellView.js b/packages/joint-core/test/jointjs/cellView.js
index 526a3c823..b7bcd8229 100644
--- a/packages/joint-core/test/jointjs/cellView.js
+++ b/packages/joint-core/test/jointjs/cellView.js
@@ -666,4 +666,23 @@ QUnit.module('cellView', function(hooks) {
         });
 
     });
+
+    QUnit.module('getLinkEnd()', function (hooks) {
+        ['port1', 13].forEach(function (portId) {
+            QUnit.test('port id: ' + typeof portId, function (assert) {
+                const cell = cellView.model;
+                cell.addPort({
+                    id: portId,
+                });
+                const portNode = cellView.findPortNode(portId);
+                assert.equal(portNode.getAttribute('port'), portId);
+                const end = cellView.getLinkEnd(portNode);
+                assert.deepEqual(end, {
+                    id: cell.id,
+                    magnet: 'circle',
+                    port: portId,
+                });
+            });
+        });
+    });
 });
diff --git a/packages/joint-core/types/joint.d.ts b/packages/joint-core/types/joint.d.ts
index 61731ca7b..786f39f8b 100644
--- a/packages/joint-core/types/joint.d.ts
+++ b/packages/joint-core/types/joint.d.ts
@@ -3302,6 +3302,8 @@ export namespace mvc {
 
         isMounted(): boolean;
 
+        protected findAttributeNode(attributeName: string, node: Element): Element | null;
+
         protected init(): void;
 
         protected onRender(): void;