Term |
Definition |
|---|---|
IGMP |
Internet Group Management Protocol. It is a signaling mechanism used by IP multicast between hosts and routers on the end network. Hosts use IGMP to join or leave a multicast group. routers use IGMP to determine whether a multicast group has group members on the downstream network segment. |
Join |
A type of message used on PIM-SM networks. When a host on a network segment requests to join a multicast group, the receiver DR sends a Join message to the RP hop by hop to generate a multicast route. When starting a switchover to the SPT, the RP sends a Join message to the source hop by hop to generate a multicast route. |
PIM |
Protocol Independent Multicast. A multicast routing protocol. Reachable unicast routes on the network are the forwarding basis of PIM, which uses the existing unicast routing information to perform RPF checks on multicast packets to create multicast routing entries and set up an MDT. |
RD |
Route distinguisher. It is an 8-byte field in a VPN IPv4 address. An RD and a 4-byte IPv4 address prefix constitute a VPN IPv4 address to differentiate the IPv4 prefixes using the same address space. |
(S, G) |
A PIM routing entry. S indicates a multicast source, and G indicates a multicast group. |
VPN |
Virtual private network, used to construct a private network on a public network. |
Acronym and Abbreviation |
Full Name |
|---|---|
AS |
Autonomous system |
BGP |
Border Gateway Protocol |
CE |
Customer edge |
LDP |
Label Distribution Protocol |
mLDP |
Multipoint extensions for LDP |
MPLS |
Multi-Protocol Label Switching |
MVPN |
Multicast VPN |
P2MP |
Point-to-multipoint |
P |
Provider |
PE |
Provider edge |
PIM |
Protocol Independent Multicast |
RPF |
Reverse path forwarding |
VPN |
Virtual Private Network |