Juniper JUNOSE SOFTWARE FOR E SERIES 11.3.X - MULTICAST ROUTING CONFIGURATION GUIDE 2010-10-07 Configuration Manual page 189

mroute port admission-bandwidth-limit
Copyright © 2010, Juniper Networks, Inc.
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 150 for details.
Use to configure a limit on the admission bandwidth of OIFs containing IPv4 or IPv6
mroutes, across different virtual routers, on a port.
Example
host1(config)#mroute port admission-bandwidth-limit 3000000
Use the no version to remove any OIF admission bandwidth limits.
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:
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.
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.
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.
NOTE: If the multicast bandwidth map that includes the set
admission-bandwidth command is changed, all affected mroutes are
reevaluated in the same manner described previously.
As an example of this function, if the port has accepted a total bandwidth of 3000000
bps, and you set a limit of 2000000 bps on the port, the router does not disconnect any
already connected OIFs but prevents the interfaces from accepting any more groups.
Over time, some groups leave the interfaces and, eventually, the port limit of 2000000
bps is reached and maintained by the router.
Chapter 5: Configuring IPv6 Multicast
167