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QuickSpecs
Overview
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
User Datagram Protocol (UDP) helper: redirects UDP broadcasts to specific IP subnets to prevent server spoofing
Dynamic Host Configuration Protocol (DHCP): simplifies the management of large IP networks and supports client and server;
DHCP Relay enables DHCP operation across subnets
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)
Interior Gateway Protocol (IGP) uses link-state protocol for faster convergence; supports ECMP, NSSA, and MD5 authentication
for increased security and graceful restart for faster failure recovery
Border Gateway Protocol 4 (BGP-4)
Exterior Gateway Protocol (EGP) with path vector protocol uses TCP for enhanced reliability for the route discovery process,
reduces bandwidth consumption by advertising only incremental updates, and supports extensive policies for increased
flexibility, as well as scales to very large networks
Intermediate system to intermediate system (IS-IS)
Interior Gateway Protocol (IGP) uses path vector protocol, which is defined by the ISO organization for IS-IS routing and
extended by IETF RFC 1195 to operate in both TCP/IP and the OSI reference model (Integrated IS-IS)
Static IPv6 routing
provides simple, manually configured IPv6 routing
Dual IP stack
maintains separate stacks for IPv4 and IPv6 to ease the transition from an IPv4-only network to an IPv6-only network design
Routing Information Protocol next generation (RIPng)
extends RIPv2 to support IPv6 addressing
OSPFv3
provides OSPF support for IPv6
BGP+
extends BGP-4 to support Multiprotocol BGP (MBGP), including support for IPv6 addressing
IS-IS for IPv6
extends IS-IS to support IPv6 addressing
IPv6 tunneling
is an important element for the transition from IPv4 to IPv6; allows IPv6 packets to traverse IPv4-only networks by
encapsulating the IPv6 packet into a standard IPv4 packet; supports manually configured, 6to4, and Intra-Site Automatic Tunnel
Addressing Protocol (ISATAP) tunnels
Multiprotocol Label Switching (MPLS)
uses BGP to advertise routes across Label Switched Paths (LSPs), but uses simple labels to forward packets from any Layer 2 or
Layer 3 protocol, thus reducing complexity and increasing performance; supports graceful restart for reduced failure impact;
supports LSP tunneling and multilevel stacks
Multiprotocol Label Switching (MPLS) Layer 3 VPN
allows Layer 3 VPNs across a provider network; uses Multiprotocol BGP (MP-BGP) to establish private routes for increased
security; supports RFC 2547bis multiple autonomous system VPNs for added flexibility; supports IPv6 MPLS VPN
Multiprotocol Label Switching (MPLS) Layer 2 VPN
establishes simple Layer 2 point-to-point VPNs across a provider network using only MPLS Label Distribution Protocol (LDP);
DA - 13813 North America — Version 13 — November 22, 2013
HP MSR20 Series
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