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.
If you set limits for both a port and interfaces on that port, the router uses the lower of
the two limits when determining whether or not an interface can accept any new MLD
groups. For example, if you specify an admission bandwidth limit of 2000000 bps for
the port and 3000000 bps groups for each interface, additional groups can only be
accepted until the port limit of 2000000 bps is reached.
Deleting Multicast Forwarding Entries
You can clear one or more forwarding entries from the multicast routing table. However,
if you do so, the entries may reappear in the routing table if they are rediscovered.
clear ipv6 mroute
• Use to delete IPv6 multicast forwarding entries.
• If you specify an *, the router clears all IP multicast forwarding entries.
• If you specify the IPv6 address of a multicast group, the router clears all multicast
forward entries for that group.
• If you specify the IPv6 address of a multicast group and the IPv6 address of a multicast
source, the router clears the multicast entry that matches that group and source.
• Example
165Copyright © 2010, Juniper Networks, Inc.
Chapter 5: Configuring IPv6 Multicast
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