Revertive And Non-Revertive Modes; Multiple Rings; Node Id; Ring Id - Juniper ACX1000 Configuration Manual

Revertive and Non-revertive Modes

Multiple Rings

Node ID

Ring ID

Bridge Domains with the Ring Port (MX Series Routers Only)

Wait-to-Block Timer

Copyright © 2017, Juniper Networks, Inc.
node must drop the RAPS message if the source MAC address in the RAPS message
belongs to itself. The source MAC address is the node's node ID.
In revertive operation, once the condition causing a switch has cleared, traffic is blocked
on the RPL and restored to the working transport entity. In nonrevertive operation, traffic
is allowed to use the RPL if it has not failed, even after a switch condition has cleared.
The Ethernet ring control module supports multiple rings in each node (two logical
interfaces are part of each ring). The ring control module also supports the interconnection
of multiple rings. Interconnection of two rings means that two rings might share the same
link or share the same node. Ring interconnection is supported only using
non-virtual-channel mode. Ring interconnection using virtual channel mode is not
supported.
For each node in the ring, a unique node ID identifies each node. The node ID is the node's
MAC address.
For routers only, you can configure this node ID when configuring the ring on the node or
automatically select an ID like STP does. In most cases, you will not configure this and
the router will select a node ID, like STP does. It should be the manufacturing MAC address.
The ring node ID should not be changed, even if you change the manufacturing MAC
address. Any MAC address can be used if you make sure each node in the ring has a
different node ID. The node ID on switches is selected automatically and is not
configurable.
The ring ID is used to determine the value of the last octet of the MAC destination address
field of the RAPS protocol data units (PDUs) generated by the ERP control process. The
ring ID is also used to discard any RAPS PDU, received by this ERP control process with
a non-matching ring ID. Ring ID values 1 through 239 are supported.
On the routers, the protection group is seen as an abstract logical port that can be
configured to any bridge domain. Therefore, if you configure one ring port or its logical
interface in a bridge domain, you must configure the other related ring port or its logical
interface to the same bridge domain. The bridge domain that includes the ring port acts
as any other bridge domain and supports the IRB Layer 3 interface.
The RPL owner node uses a delay timer before initiating an RPL block in revertive mode
of operation or before reverting to IDLE state after clearing manual commands. The
Wait-to-Block (WTB) timer is used when clearing
commands. As multiple
force switch
ring, the WTB timer ensures that clearing of a single
Chapter 4: Configuring Interfaces and Chassis
force switch and
commands are allowed to coexist in an Ethernet
force switch
manual switch
command does not
117