Multicast

IGMP and MLD snooping version configuration (ACX5448, ACX5448-M, ACX5448-D, ACX710, MX204, MX240, MX480, MX960, MX10003, MX10004, MX10008, MX10016, MX2008, MX2010, and MX2020)—Starting in Junos OS Evolved Release 23.4R1, you can configure the version of IGMP or MLD snooping queries for VLANs or bridge domains associated with Layer 2 (L2) multicast. This configuration ensures that end hosts or CPE devices that are not compliant with RFC 4541 and can’t normally respond to snooping queries of a later version are now able to process and respond to those snooping queries.

To configure the IGMP or MLD snooping version, use the following CLI statements:

• set protocols igmp-snooping version version
• set protocols mld-snooping version version

[See IGMP MLD Snooping Version Configuration.]

Multiple active and backup paths in RPF list (MX240, MX480, MX960, MX10004, MX10008, and MX10016 with MPC5E and MPC7E line cards)—Starting in Junos OS Release 23.4R1, the session ID created for a unicast RPF next-hop is used to group labels in the same LSP. This allows Junos to accept and forward traffic from any label with a matching Session ID. This minimizes transmission loss time to sub-50 ms in the cases of MBB in Hot-root standby (HRS) enabled NG-MVPN provider tunnels, and I-PMSI to S-PMSI switchovers.

[See Multiple Active and Backup Paths in RPF List.]

Backup UMH selection (MX960)—In earlier releases, backup upstream multicast hop (UMH) selection was based on the highest IP address. Starting in Junos OS Release 23.4R1, backup UMH selection is based on the same algorithm used to select the primary UMH. This feature is enabled by default.

[See Backup UMH Selection.]