Requirements for Multicast MCT

  • OSPF must be supported on MCT member VLAN virtual Ethernet (VE) interfaces; that is, on CCEP, CEP, and ICL links.
  • The ccep-up-delay command should be configured in order to get better convergence when the whole cluster peer goes down or is reloaded, or when the complete ICL LAG flaps. The recommended value to configure is 300 seconds (75k mac scale, 1200 IGMP snoop mcache, 1200 MLS snoop mcache, 1200 PIMv4 mcache).
  • The delay-notifications command should be configured to avoid a VE interface flap when the whole cluster peer goes down or is reloaded, or when a complete ICL LAG goes down. The recommended value to configure is 15 seconds.
  • It is recommended that MCT cluster peers are PIM, OSPF DR, or BDR.
  • It is recommended to use Loose mode with a keep-alive VLAN.
Parent topic: PIM Over MCT Intermediate Router Functionality