Release Software Protocols

The following list identifies the major software protocols supported in this release. For detailed information about any protocol, see the configuration guides.

Core Routing Stack

• Internet Protocol (IP) version 4 and version 6
• Transmission Control Protocol (TCP) for IPv4
• User Datagram Protocol (UDP) for IPv4 and IPv6

Network Management Protocols

• Simple Network Management Protocol (SNMP) versions 1, 2c, and 3

Routing Protocols

• Border Gateway Protocol (BGP-4)
• Distance Vector Multicast Routing Protocol (DVMRP)
• Internet Group Membership Protocol (IGMP)
• Intermediate System-to-Intermediate System (IS-IS)
• Open Shortest Path First (OSPF) version 2 and version 3
• Protocol Independent Multicast Protocol (PIM), including PIM dense mode, PIM sparse mode, PIM dense-sparse mode, and PIM source-specific multicast
• Routing Information Protocol (RIP) version 2
• Virtual Router Redundancy Protocol (VRRP)

Multiprotocol Label Switching (MPLS)

• Label Distribution Protocol (LDP)
• Resource ReSerVation Protocol - Traffic Engineering Extensions (RSVP-TE)

Layer 2 Protocols

• Asynchronous Transfer Mode (ATM)
• Cisco HDLC
• Ethernet
• Frame Relay
• Layer 2 Tunneling Protocol (L2TP)
• Multilink Frame Relay (MLFR)
• Multilink Point-to-Point Protocol (MLPPP)
• Point-to-Point Protocol (PPP)
• PPP over Ethernet (PPPoE)

Security Protocols

• Internet Key Exchange (IKE)
• Internet Security Association and Key Management Protocol (ISAKMP)
• IP Authentication Header (AH)
• IP Encapsulating Security Payload (ESP)
• Network Address Translation (NAT)