Juniper JUNOSE 11.1.X MULTICAST ROUTING, Configuration Manual

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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. When an IOF is subsequently added to the mroute, the 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” on page 154 for details.
Enabling Port Admission Bandwidth Control
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” on page 154 for details.
mroute port admission-bandwidth-limit
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Use to configure a limit on the admission bandwidth of OIFs containing IPv4 or
IPv6 mroutes, across different virtual routers, on a port.
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Example
host1(config)# mroute port admission-bandwidth-limit 3000000
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Use the no version to remove any OIF admission bandwidth limits.
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See mroute port admission-bandwidth-limit.
OIF Port Reevaluation Example
If you change the admission bandwidth for a port, all mroutes with an OIF on that
port are reevaluated as follows:
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If the bandwidth limit is increased, blocked OIFs can become unblocked.
However, the order in which the mroutes are visited, and which (S,G) streams
become unblocked, is not specified.
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If the bandwidth limit of a port is decreased, no currently admitted OIFs are
blocked. However, no new OIFs are admitted until the total admitted bandwidth
for the port drops below the new limit.
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If the bandwidth is increased to the point that the bandwidth limit for an interface
is now exceeded, no currently admitted OIFs for the affected mroutes are blocked.
However, no new OIFs are admitted until the total admitted bandwidth drops
below the configured limit.
Blocking and Limiting Multicast Traffic
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Chapter 5: Configuring IPv6 Multicast