Configuring Graceful Restart Options For Rip And Ripng; Configuring Graceful Restart Options For Pim Sparse Mode - Juniper EX9200 Features Manual

Configuring Graceful Restart Options for RIP and RIPng

Configuring Graceful Restart Options for PIM Sparse Mode

Copyright © 2017, Juniper Networks, Inc.
To configure the duration of the RIP or RIPng graceful restart period, include the
statement at the
restart-time
[edit]
protocols {
(rip | ripng) {
graceful-restart {
disable;
restart-time seconds;
}
}
}
routing-options {
graceful-restart;
}
To disable RIP or RIPng graceful restart capability, include the
[edit protocols (rip | ripng) graceful-restart]
PIM sparse mode continues to forward existing multicast packet streams during a graceful
restart, but does not forward new streams until after the restart is complete. After a
restart, the routing platform updates the forwarding state with any updates that were
received from neighbors and occurred during the restart period. For example, the routing
platform relearns the join and prune states of neighbors during the restart, but does not
apply the changes to the forwarding table until after the restart.
PIM sparse mode-enabled routing platforms generate a unique 32-bit random number
called a generation identifier. Generation identifiers are included by default in PIM hello
messages, as specified in the IETF Internet draft Protocol Independent Multicast - Sparse
Mode (PIM-SM): Protocol Specification (Revised). When a routing platform receives PIM
hellos containing generation identifiers on a point-to-point interface, Junos OS activates
an algorithm that optimizes graceful restart.
Before PIM sparse mode graceful restart occurs, each routing platform creates a
generation identifier and sends it to its multicast neighbors. If a PIM sparse mode-enabled
routing platform restarts, it creates a new generation identifier and sends it to its neighbors.
When a neighbor receives the new identifier, it resends multicast updates to the restarting
router to allow it to exit graceful restart efficiently. The restart phase completes when
either the PIM state becomes stable or when the restart interval timer expires.
If a routing platform does not support generation identifiers or if PIM is enabled on
multipoint interfaces, the PIM sparse mode graceful restart algorithm does not activate,
and a default restart timer is used as the restart mechanism.
To configure the duration of the PIM graceful restart period, include the
statement at the
[edit protocols pim graceful-restart]
[edit]
protocols {
Chapter 12: Configuring Graceful Restart
[edit protocols (rip | ripng) graceful-restart]
hierarchy level.
hierarchy level:
hierarchy level.
statement at the
disable
restart-duration
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