diff --git a/modules/angular2/src/alt_router/recognize.ts b/modules/angular2/src/alt_router/recognize.ts
index 61de5d2fe8..5adb71fd15 100644
--- a/modules/angular2/src/alt_router/recognize.ts
+++ b/modules/angular2/src/alt_router/recognize.ts
@@ -45,12 +45,13 @@ function _constructSegment(componentResolver: ComponentResolver,
                            matched: _MatchResult): Promise<TreeNode<RouteSegment>[]> {
   return componentResolver.resolveComponent(matched.route.component)
       .then(factory => {
+        let urlOutlet = matched.consumedUrlSegments[0].outlet;
         let segment = new RouteSegment(matched.consumedUrlSegments, matched.parameters,
-                                       matched.consumedUrlSegments[0].outlet,
+                                       isBlank(urlOutlet) ? DEFAULT_OUTLET_NAME : urlOutlet,
                                        matched.route.component, factory);
 
-        if (isPresent(matched.leftOverUrl)) {
-          return _recognize(componentResolver, matched.route.component, matched.leftOverUrl)
+        if (matched.leftOverUrl.length > 0) {
+          return _recognizeMany(componentResolver, matched.route.component, matched.leftOverUrl)
               .then(children => [new TreeNode<RouteSegment>(segment, children)]);
         } else {
           return [new TreeNode<RouteSegment>(segment, [])];
@@ -78,12 +79,13 @@ function _matchWithParts(route: RouteMetadata, url: TreeNode<UrlSegment>): _Matc
 
   let current = url;
   for (let i = 0; i < parts.length; ++i) {
+    if (isBlank(current)) return null;
+
     let p = parts[i];
     let isLastSegment = i === parts.length - 1;
     let isLastParent = i === parts.length - 2;
     let isPosParam = p.startsWith(":");
 
-    if (isBlank(current)) return null;
     if (!isPosParam && p != current.value.segment) return null;
     if (isLastSegment) {
       lastSegment = current;
@@ -101,10 +103,18 @@ function _matchWithParts(route: RouteMetadata, url: TreeNode<UrlSegment>): _Matc
     current = ListWrapper.first(current.children);
   }
 
-  let parameters = <{[key: string]: string}>StringMapWrapper.merge(lastSegment.value.parameters,
-                                                                   positionalParams);
+  if (isPresent(current) && isBlank(current.value.segment)) {
+    lastParent = lastSegment;
+    lastSegment = current;
+  }
+
+  let p = lastSegment.value.parameters;
+  let parameters =
+      <{[key: string]: string}>StringMapWrapper.merge(isBlank(p) ? {} : p, positionalParams);
   let axuUrlSubtrees = isPresent(lastParent) ? lastParent.children.slice(1) : [];
-  return new _MatchResult(route, consumedUrlSegments, parameters, current, axuUrlSubtrees);
+
+  return new _MatchResult(route, consumedUrlSegments, parameters, lastSegment.children,
+                          axuUrlSubtrees);
 }
 
 function _checkOutletNameUniqueness(nodes: TreeNode<RouteSegment>[]): TreeNode<RouteSegment>[] {
@@ -123,8 +133,8 @@ function _checkOutletNameUniqueness(nodes: TreeNode<RouteSegment>[]): TreeNode<R
 
 class _MatchResult {
   constructor(public route: RouteMetadata, public consumedUrlSegments: UrlSegment[],
-              public parameters: {[key: string]: string}, public leftOverUrl: TreeNode<UrlSegment>,
-              public aux: TreeNode<UrlSegment>[]) {}
+              public parameters: {[key: string]: string},
+              public leftOverUrl: TreeNode<UrlSegment>[], public aux: TreeNode<UrlSegment>[]) {}
 }
 
 function _readMetadata(componentType: Type) {
diff --git a/modules/angular2/src/alt_router/segments.ts b/modules/angular2/src/alt_router/segments.ts
index 4d39f4a851..0559e58dd1 100644
--- a/modules/angular2/src/alt_router/segments.ts
+++ b/modules/angular2/src/alt_router/segments.ts
@@ -1,7 +1,6 @@
 import {ComponentFactory} from 'angular2/core';
 import {StringMapWrapper, ListWrapper} from 'angular2/src/facade/collection';
-import {Type, isBlank, isPresent} from 'angular2/src/facade/lang';
-import {DEFAULT_OUTLET_NAME} from './constants';
+import {Type, isBlank, isPresent, stringify} from 'angular2/src/facade/lang';
 
 export class Tree<T> {
   /** @internal */
@@ -59,18 +58,21 @@ export class TreeNode<T> {
 }
 
 export class UrlSegment {
-  constructor(public segment: string, public parameters: {[key: string]: string},
+  constructor(public segment: any, public parameters: {[key: string]: string},
               public outlet: string) {}
 
   toString(): string {
-    let outletPrefix = this.outlet == DEFAULT_OUTLET_NAME ? "" : `${this.outlet}:`;
-    return `${outletPrefix}${this.segment}${_serializeParams(this.parameters)}`;
+    let outletPrefix = isBlank(this.outlet) ? "" : `${this.outlet}:`;
+    let segmentPrefix = isBlank(this.segment) ? "" : this.segment;
+    return `${outletPrefix}${segmentPrefix}${_serializeParams(this.parameters)}`;
   }
 }
 
 function _serializeParams(params: {[key: string]: string}): string {
   let res = "";
-  StringMapWrapper.forEach(params, (v, k) => res += `;${k}=${v}`);
+  if (isPresent(params)) {
+    StringMapWrapper.forEach(params, (v, k) => res += `;${k}=${v}`);
+  }
   return res;
 }
 
@@ -94,10 +96,23 @@ export class RouteSegment {
   get stringifiedUrlSegments(): string { return this.urlSegments.map(s => s.toString()).join("/"); }
 }
 
+export function serializeRouteSegmentTree(tree: Tree<RouteSegment>): string {
+  return _serializeRouteSegmentTree(tree._root);
+}
+
+function _serializeRouteSegmentTree(node: TreeNode<RouteSegment>): string {
+  let v = node.value;
+  let children = node.children.map(c => _serializeRouteSegmentTree(c)).join(", ");
+  return `${v.outlet}:${v.stringifiedUrlSegments}(${stringify(v.type)}) [${children}]`;
+}
+
 export function equalSegments(a: RouteSegment, b: RouteSegment): boolean {
   if (isBlank(a) && !isBlank(b)) return false;
   if (!isBlank(a) && isBlank(b)) return false;
-  return a._type === b._type && StringMapWrapper.equals(a.parameters, b.parameters);
+  if (a._type !== b._type) return false;
+  if (isBlank(a.parameters) && !isBlank(b.parameters)) return false;
+  if (!isBlank(a.parameters) && isBlank(b.parameters)) return false;
+  return StringMapWrapper.equals(a.parameters, b.parameters);
 }
 
 export function routeSegmentComponentFactory(a: RouteSegment): ComponentFactory {
diff --git a/modules/angular2/test/alt_router/recognize_spec.ts b/modules/angular2/test/alt_router/recognize_spec.ts
index d161a7f75c..454d8958d2 100644
--- a/modules/angular2/test/alt_router/recognize_spec.ts
+++ b/modules/angular2/test/alt_router/recognize_spec.ts
@@ -19,7 +19,7 @@ import {recognize} from 'angular2/src/alt_router/recognize';
 import {Routes, Route} from 'angular2/alt_router';
 import {provide, Component, ComponentResolver} from 'angular2/core';
 import {UrlSegment, Tree} from 'angular2/src/alt_router/segments';
-import {DefaultRouterUrlParser} from 'angular2/src/alt_router/router_url_parser';
+import {DefaultRouterUrlSerializer} from 'angular2/src/alt_router/router_url_serializer';
 import {DEFAULT_OUTLET_NAME} from 'angular2/src/alt_router/constants';
 
 export function main() {
@@ -100,6 +100,23 @@ export function main() {
              });
        }));
 
+    it('should handle non top-level aux routes',
+       inject([AsyncTestCompleter, ComponentResolver], (async, resolver) => {
+         recognize(resolver, ComponentA, tree('b/paramB/d(e)'))
+             .then(r => {
+               let c = r.children(r.firstChild(r.root));
+               expect(stringifyUrl(c[0].urlSegments)).toEqual(["d"]);
+               expect(c[0].outlet).toEqual(DEFAULT_OUTLET_NAME);
+               expect(c[0].type).toBe(ComponentD);
+
+               expect(stringifyUrl(c[1].urlSegments)).toEqual(["e"]);
+               expect(c[1].outlet).toEqual("aux");
+               expect(c[1].type).toBe(ComponentE);
+
+               async.done();
+             });
+       }));
+
     it('should handle matrix parameters',
        inject([AsyncTestCompleter, ComponentResolver], (async, resolver) => {
          recognize(resolver, ComponentA, tree("b/paramB;b1=1;b2=2(/d;d1=1;d2=2)"))
@@ -143,7 +160,7 @@ export function main() {
 }
 
 function tree(url: string): Tree<UrlSegment> {
-  return new DefaultRouterUrlParser().parse(url);
+  return new DefaultRouterUrlSerializer().parse(url);
 }
 
 function stringifyUrl(segments: UrlSegment[]): string[] {
@@ -164,7 +181,11 @@ class ComponentC {
 }
 
 @Component({selector: 'b', template: 't'})
-@Routes([new Route({path: "c/:c", component: ComponentC})])
+@Routes([
+  new Route({path: "d", component: ComponentD}),
+  new Route({path: "e", component: ComponentE}),
+  new Route({path: "c/:c", component: ComponentC})
+])
 class ComponentB {
 }