IPv6 Addressing | 495FTOS IPv6 supports quality of service based on DSCP field. You can configure FTOS to honor the DSCPvalue on incoming routed traffic and forward the packets with the same value.Refer to Chapter 41, Quality of Service for details. Refer also to the Honor DSCP values on ingresspackets in the QoS chapter for information relating to the trust diffserv command.IPv6 MulticastIPv6 Multicast is supported on platforms: c e sFTOS supports the following protocols to implement IPv6 multicast routing:• Multicast Listener Discovery Protocol (MLD). MLD on a multicast router sends out periodic generalMLD queries that the switch forwards through all ports in the VLAN. There are two versions of MLD:MLD version 1 is based on version 2 of the Internet Group Management Protocol (IGMP) for IPv4,and MLD version 2 is based on version 3 of the IGMP for IPv4. IPv6 multicast for FTOS supportsversions 1 and 2• PIM-SM. Protocol-Independent Multicast-Sparse Mode (PIM-SM) is a multicast protocol in whichmulticast receivers explicitly join to receive multicast traffic. The protocol uses a router as the root orRendezvous Point (RP) of the share tree distribution tree to distribute multicast traffic to a multicastgroup. Messages to join the multicast group (Join messages) are sent towards the RP and data is sentfrom senders to the RP so receivers can discover who are the senders and begin receiving trafficdestined to the multicast group.• PIM in Source Specific Multicast (PIM-SSM). PIM-SSM protocol is based on the source specificmodel for forwarding Multicast traffic across multiple domains on the Internet. It is restricted toshortest path trees (SPTs) to specific sources described by hosts using MLD. PIM-SSM is essentially asubset of PIM-SM protocol, which has the capability to join SPTs. The only difference being registerstates and shared tree states for Multicast groups in SSM range are not maintained. End-hosts useMLD to register their interest in a particular source-group (S,G) pair. PIM-SSM protocol interacts withMLD to construct the multicast forwarding tree rooted at the source S.Refer to FTOS Command Line Interface Reference document chapters Multicast IPv6, and ProtocolIndependent Multicast (IPv6) for configuration details.SSH over an IPv6 TransportIPv6 SSH is supported on platforms c e sFTOS supports both inbound and outbound SSH sessions using IPv6 addressing. Inbound SSH supportsaccessing the system through the management interface as well as through a physical Layer 3 interface.Refer to the Security Commands chapter in the FTOS Command Line Interface Reference document for SSHconfiguration details.
