Configuring Multicast Source Lifetime; Configuring Pim Prune Delay - 3Com 5500-EI PWR Install Manual

To do...
Configure a limit on the
number of PIM neighbors
on the interface
Configure a filtering rule to
filter PIM neighbors
If the number of existing PIM neighbors exceeds the user-defined limit, the existing PIM neighbors will
not be deleted.

Configuring Multicast Source Lifetime

Initially, some data is lost when multicast receivers receive multicast data from a multicast source. The
reason is that (S, G) entries in the PIM routing table and multicast routing table age out if no data stream
is received within a configurable period of time, known as multicast source lifetime or (S, G) aging time.
These entries need to be reestablished before the corresponding multicast data can be forwarded by
the multicast switch again. In the process of table entry reestablishment, some data may be lost.
If the multicast source lifetime is appropriately lengthened when the data traffic has stopped, the
multicast data, when arriving at the multicast switch again, can be forwarded by the switch without the
need of reestablishing the table entries. This helps avoid data loss.
Follow these steps to configure multicast source lifetime:
To do...
Enter system view
Enter PIM view
Configure multicast source
lifetime
The configured multicast source lifetime applies to all (S, G) entries in the PIM routing table and the
multicast routing table rather than to a specific (S, G) entry, and the configuration changes the aging
time of all the existing (S, G) entries.

Configuring PIM Prune Delay

Use the command...
pim neighbor-limit limit
pim neighbor-policy
acl-number
Use the command...
system-view
pim
source-lifetime interval
17
Remarks
Optional
By default, the upper limit on the
number of PIM neighbors on an
interface is 128.
Optional
By default, no filtering rule is
configured.
Remarks
—
—
Optional
210 seconds by default