Resiliency and high availability
Backup Center
acts as a part of the management and backup function to provide backup for device interfaces; delivers reliability by
switching traffic over to a backup interface when the primary one fails
Virtual Router Redundancy Protocol (VRRP)
allows groups of two routers to dynamically back each other up to create highly available routed environments; and
supports VRRP load balancing
Wireless WAN (WWAN) with integrated 3G
allows small-branch users to maintain remote office data connectivity to data center or headquarters, using the
integrated carrier connections
Layer 2 switching
Spanning Tree Protocol (STP)
supports standard IEEE 802.1D STP, IEEE 802.1w Rapid Spanning Tree Protocol (RSTP) for faster convergence, and IEEE
802.1s Multiple Spanning Tree Protocol (MSTP)
Internet Group Management Protocol (IGMP) and Multicast
Listener Discovery (MLD) protocol snooping controls and manages the flooding of multicast packets in a Layer 2 network
Port mirroring
duplicates port traffic (ingress and egress) to a local or remote monitoring port
Port isolation
increases security by isolating ports within a VLAN while still allowing them to communicate with other VLANs
VLANs
supports IEEE 802.1Q-based VLANs
sFlow
allows traffic sampling
Layer 3 services
Address Resolution Protocol (ARP)
determines the MAC address of another IP host in the same subnet; supports static ARPs; gratuitous ARP allows detection
of duplicate IP addresses; proxy ARP allows normal ARP operation between subnets or when subnets are separated by a
Layer 2 network
Dynamic Host Configuration Protocol (DHCP)
simplifies the management of large IP networks and supports client and server; DHCP Relay enables DHCP operation
across subnets
Built-in applications support
o Device management controller (DMC): acts as the gateway of a virtual "network training room"
o Wisdom Network (WiNet) technology: helps manage a large number of scattered network devices centrally
o Remote terminal connection (RTC) and true type terminal (TTY) access: allows the connection of a terminal to
a router through an asynchronous interface for data exchange with a front-end processor (FEP) or another
terminal through the router
Layer 3 routing
Static IPv4 routing
provides simple manually configured IPv4 routing
Routing Information Protocol (RIP)
uses a distance vector algorithm with UDP packets for route determination; supports RIPv1 and RIPv2 routing; includes
loop protection
Open shortest path first (OSPF)
delivers faster convergence; uses this link-state routing Interior Gateway Protocol (IGP), which supports ECMP, NSSA, and
