Enabling Port-Level Admission Bandwidth Control

Port-level multicast admission control is performed when an OIF on that port is added to the mroute for a given (S,G) multicast data stream and the multicast bandwidth map contains a set admission-bandwidth action for that (S,G).

When enabled, the admission-bandwidth for a particular (S,G) is read from the multicast bandwidth map and recorded in the mroute when the (S,G) mroute is created. If you configure a port limit and the OIF count on the port exceeds that limit, no OIFs on that port are added to mroutes (that is, OIFs are blocked).

When a multicast forwarding entry (an mroute) is added with an outgoing interface, OIF is blocked from forwarding data if the additional bandwidth contributed by the (S,G) would exceed the admission-bandwidth limit for the port on which the interface resides.

Caution: Before you can limit port-level admission bandwidth, you must first create a bandwidth map. See Defining a Multicast Bandwidth Map for details.

You can use the mroute port admission-bandwidth-limit command to limit the total multicast bandwidth that can be admitted on a port. The admitted bandwidth is summed across all virtual routers with IPv4 and IPv6 mroutes that have OIFs on the port.

Note: Admission bandwidth values for a given (S,G) mroute are determined from the bandwidth map. See Defining a Multicast Bandwidth Map for details.