2006 Cisco Systems, Inc. All rights reserved.BCMSN v3.05-1Module Summary HSRP is enabled so that redundant routers can provide default gateway functionality. HSRP can be tuned to provide subsecond failover to a standby router. VRRP or GLBP can provide Layer 3 router failover in addition to load balancing at the distribution layer. 2006 Cisco Systems, Inc. All rights reserved.BCMSN v3.05-2