IPv6--Anycast Address |
12.2(25)S 12.2(28)SB 12.2(25)SG 12.2(33)SRA 12.2(33)SXH 12.3(4)T 12.4 12.4(2)T |
An anycast address is an address that is assigned to a set of interfaces that typically belong to different nodes. |
IPv6--Base Protocols High Availability |
12.2(33)SRE |
IPv6 neighbor discovery supports SSO. |
IPv6--ICMP Rate Limiting |
12.2(8)T 12.3 12.3(2)T 12.4 12.4(2)T |
The IPv6 ICMP Rate Limiting feature implements a token bucket algorithm for limiting the rate at which IPv6 ICMP error messages are sent out on the network. |
IPv6--ICMPv6 |
12.0(22)S 12.2(14)S 12.2(28)SB 12.2(25)SG 12.2(33)SRA 12.2(17a)SX112.2(2)T 12.3 12.3(2)T 12.4 12.4(2)T |
ICMP for IPv6 generates error messages, such as ICMP destination unreachable messages, and informational messages, such as ICMP echo request and reply messages. Additionally, ICMP packets in IPv6 are used in the IPv6 neighbor discovery process, path MTU discovery, and the MLD protocol for IPv6. |
IPv6--ICMPv6 Redirect |
12.0(22)S 12.2(14)S 12.2(28)SB 12.2(25)SG 12.2(33)SRA 12.2(17a)SX1 12.2(4)T 12.3 12.3(2)T 12.4 12.4(2)T |
A value of 137 in the Type field of the ICMP packet header identifies an IPv6 neighbor redirect message. Routers send neighbor redirect messages to inform hosts of better first-hop nodes on the path to a destination. |
IPv6--IPv6 Default Router Preferences |
12.2(33)SB 12.2(33)SRA 12.4(2)T 12.2(33)SXH 15.0(1)S |
The DRP extension provides a coarse preference metric (low, medium, or high) for default routers. |
IPv6--IPv6 MTU Path Discovery |
12.0(22)S 12.2(14)S 12.2(28)SB 12.2(25)SG 12.2(33)SRA 12.2(17a)SX112.2(2)T 12.3 12.3(2)T 12.4 12.4(2)T 15.0(1)S |
Path MTU discovery in IPv6 allows a host to dynamically discover and adjust to differences in the MTU size of every link along a given data path. |
IPv6--IPv6 Neighbor Discovery |
12.0(22)S 12.2(14)S 12.2(28)SB 12.2(25)SG 12.2(33)SRA 12.2(17a)SX1 12.2(2)T 12.3 12.3(2)T 12.4 12.4(2)T 15.0(1)S |
The IPv6 neighbor discovery process uses ICMP messages and solicited-node multicast addresses to determine the link-layer address of a neighbor on the same network (local link), verify the reachability of a neighbor, and track neighboring routers. |
IPv6--IPv6 Neighbor Discovery Duplicate Address Detection |
12.0(22)S 12.2(14)S 12.2(28)SB 12.2(25)SG 12.2(33)SRA 12.2(17a)SX1 12.2(4)T 12.3 12.3(2)T 12.4 12.4(2)T |
IPv6 neighbor discovery duplicate address detection is performed first on a new, link-local IPv6 address before the address is assigned to an interface (the new address remains in a tentative state while duplicate address detection is performed). |
IPv6--IPv6 Stateless Autoconfiguration |
12.0(22)S 12.2(14)S 12.2(28)SB 12.2(25)SG 12.2(33)SRA 12.2(17a)SX112.2(2)T 12.3 12.3(2)T 12.4 12.4(2)T 15.0(1)S |
The IPv6 Stateless Autoconfiguration feature can be used to manage link, subnet, and site addressing changes. |
IPv6--IPv6 Static Cache Entry for Neighbor Discovery |
12.0(22)S 12.2(14)S 12.2(28)SB 12.2(33)SRA 12.2(17a)SX1 12.2(8)T 12.3 12.3(2)T 12.4 12.4(2)T 15.0(1)S |
The IIPv6 Static Cache Entry for Neighbor Discovery feature allows static entries to be made in the IPv6 neighbor cache. |
IPv6--Per-Interface Neighbor Discovery Cache Limit |
15.1(3)T |
The Per-Interface Neighbor Discovery Cache Limit feature provides the ability to limit the number of neighbor discovery cache entries on a per interface basis. The following commands were introduced or modified for this feature: ipv6 nd cache interface-limit (global), ipv6 nd cache interface-limit (interface), show ipv6 neighbors. |
IPv6 Access Services: Routed Bridged Encapsulation (RBE) |
12.3(4)T 12.4 12.4(2)T |
RBE provides a mechanism for routing a protocol from a bridged interface to another routed or bridged interface. |
IPv6 Address Types--Unicast |
12.0(22)S 12.2(14)S 12.2(28)SB 12.2(33)SRA 12.2(17a)SX1 12.2(2)T 12.3 12.3(2)T 12.4 12.4(2)T |
An IPv6 unicast address is an identifier for a single interface, on a single node. |
IPv6 Data Link--ATM PVC and ATM LANE |
12.0(22)S 12.2(14)S 12.2(28)SB 12.2(33)SRA 12.2(2)T 12.3 12.3(2)T 12.4 12.4(2)T |
In IPv6 networks, a data link is a network sharing a particular link-local prefix. ATM PVC and ATM LANE are data links supported for IPv6. |
IPv6 Data Link--Cisco High-Level Data Link Control (HDLC) |
12.0(22)S 12.2(14)S 12.2(28)SB 12.2(33)SRA 12.2(2)T 12.3 12.3(2)T 12.4 12.4(2)T |
In IPv6 networks, a data link is a network sharing a particular link-local prefix. HDLC is a type of data link supported for IPv6. |
IPv6 Data Link--Dynamic Packet Transport (DPT) |
12.0(23)S |
In IPv6 networks, a data link is a network sharing a particular link-local prefix. DPT is a type of data link supported for IPv6. |
IPv6 Data Link--Ethernet, Fast Ethernet, Gigabit Ethernet, and 10-Gigabit Ethernet |
12.0(22)S 12.2(14)S 12.2(28)SB 12.2(33)SRA12.2(2)T 12.3 12.3(2)T 12.4 12.4(2)T |
In IPv6 networks, a data link is a network sharing a particular link-local prefix. Ethernet, Fast Ethernet, Gigabit Ethernet, and 10-Gigabit Ethernet are data links supported for IPv6. |
IPv6 Data Link--FDDI |
12.2(14)S 12.2(28)SB 12.2(33)SRA 12.2(2)T 12.3 12.3(2)T 12.4 12.4(2)T |
In IPv6 networks, a data link is a network sharing a particular link-local prefix. FDDI is a type of data link supported for IPv6. |
IPv6 Data Link--Frame Relay PVC |
12.0(22)S 12.2(14)S 12.2(28)SB 12.2(33)SRA 12.2(2)T 12.3 12.3(2)T 12.4 12.4(2)T |
In IPv6 networks, a data link is a network sharing a particular link-local prefix. Frame relay PVC is a type of data link supported for IPv6. |
IPv6 Data Link--PPP service over Packet over SONET, ISDN, and serial (synchronous and asynchronous) interfaces |
12.0(22)S 12.2(14)S 12.2(28)SB 12.2(33)SRA 12.2(2)T 12.3 12.3(2)T 12.4 12.4(2)T |
In IPv6 networks, a data link is a network sharing a particular link-local prefix. PPP service over Packet over SONET, ISDN, and serial interfaces is a type of data link supported for IPv6. |
IPv6 Data Link--VLANs using Cisco Inter-Switch Link (ISL) |
12.0(22)S 12.2(14)S 12.2(28)SB 12.2(25)SG 12.2(33)SRA 12.2(18)SXE 12.2(2)T 12.3 12.3(2)T 12.4 12.4(2)T 15.0(1)S |
In IPv6 networks, a data link is a network sharing a particular link-local prefix. VLANs using Cisco ISL is a type of data link supported for IPv6. |
IPv6 Data Link--VLANs using IEEE 802.1Q encapsulation |
12.0(22)S 12.2(28)SB 12.2(25)SG 12.2(33)SRA 12.2(18)SXE 12.2(14)S 12.2(2)T 12.3 12.3(2)T 12.4 12.4(2)T 15.0(1)S |
In IPv6 networks, a data link is a network sharing a particular link-local prefix. VLANs using IEEE 802.1Q encapsulation is a type of data link supported for IPv6. |
Enhanced IPv6 Neighbor Discovery Cache Management |
12.2(33)SXI7 |
The IPv6 highly scalable neighbor discovery feature optimizes IPv6 neighbor discovery by providing ND cache autorefresh, unsolicited NA gleaning, and NUD exponential retransmit. |
IPv6 Services--AAAA DNS lookups over an IPv4 Transport |
12.0(22)S 12.2(14)S 12.2(28)SB 12.2(25)SG 12.2(33)SRA 12.2(17a)SX1 12.2(2)T 12.3 12.3(2)T 12.4 12.4(2)T 15.0(1)S |
IPv6 basic connectivity can be enhanced by configuring support for AAAA record types in the DNS name-to-address and address-to-name lookup processes. |
IPv6 Services--Cisco Discovery Protocol--IPv6 Address Family Support for Neighbor Information |
12.2(14)S 12.2(28)SB 12.2(25)SG 12.2(33)SRA 12.2(18)SXE 12.2(8)T 12.3 12.3(2)T 12.4 12.4(2)T 15.0(1)S |
The Cisco Discovery Protocol IPv6 Address Support for Neighbor Information feature adds the ability to transfer IPv6 addressing information between two Cisco devices. |
IPv6 Services--DNS Lookups over an IPv6 Transport |
12.0(22)S 12.2(14)S 12.2(28)SB 12.2(25)SG 12.2(33)SRE2 12.2(8)T 12.3 12.3(2)T 12.4 12.4(2)T 15.0(1)S |
IPv6 supports DNS record types that are supported in the DNS name-to-address and address-to-name lookup processes. |
IPv6 Services--Generic Prefix |
12.3(4)T 12.4 12.4(2)T |
The upper 64 bits of an IPv6 address are composed from a global routing prefix plus a subnet ID. A general prefix (for example, /48) holds a short prefix, based on which a number of longer, more specific, prefixes (for example, /64) can be defined. |
IPv6 Switching--Cisco Express Forwarding and Distributed Cisco Express Forwarding Support |
12.0(21)ST 12.0(22)S 12.2(14)S 12.2(28)SB 12.2(25)SG 12.2(33)SRA 12.2(17a)SX1 12.2(13)T 12.3 12.3(2)T 12.4 12.4(2)T 15.0(1)S |
Cisco Express Forwarding for IPv6 is advanced, Layer 3 IP switching technology for the forwarding of IPv6 packets. Distributed Cisco Express Forwarding for IPv6 performs the same functions as CEFv6 but for distributed architecture platforms such as the GSRs and the Cisco 7500 series routers. |
IPv6 Support on BVI Interfaces |
15.1(2)T |
This feature allows IPv6 commands to be supported on BVI so that users can assign IPv6 addresses to a BVI and route IPv6 packets. |
Unicast Reverse Path Forwarding for IPv6 |
12.0(31)S 12.2(50)SY |
The Unicast RPF feature mitigates problems caused by malformed or forged (spoofed) IPv6 source addresses that pass through an IPv6 router. The following command was introduced: ipv6 verify unicast source reachable-via. |