Juniper Networks JUNOS OS 10.4 - Manual (Page 195)

Meaning The output displayed shows that protection groups ring-1 and ring-2 have a Request/state
of NR , meaning there is no request for APS on the ring. If a Request/state of SF is displayed,
it indicates there is a signal failure on the ring. The output also shows that the ring
protection link is not blocked. The
No Flush field displays No , indicating that MAC
addresses will be flushed when the ring nodes receive this message first time. A value of
Yes would indicate MAC address flushing is not needed. The Originator field for ring-1
displays yes , indicating that this node is an R-APS originator. The Originator field for ring-2
displays No , indicating that this node is not an R-APS originator.
Verifying the Data Channel CS2
Purpose Verify the forwarding state of the data channel.
Action List the interfaces acting as the control channels and their respective data channels
(represented by the STP index number):
user@cs2> show protection-group ethernet-ring data-channel
Ethernet ring data channel parameters for protection group ring-1
Interface STP index Forward State
ge-2/0/4 44 forwarding
ge-2/0/8 45 forwarding
Ethernet ring data channel parameters for protection group ring-2
Interface STP index Forward State
ge-2/0/4 46 forwarding
ge-2/0/8 47 discarding
Meaning The output displayed shows the STP index number used by each interface in ring instances
ring-1 and ring-2 . The STP index controls the forwarding behavior for a set of VLANs on
the data channel of a ring instance on a ring interface. For ring instances, there are multiple
STP index numbers (here representing VLANs 200, 300, 500, and 600). The
Forward
State shows whether the data channel is forwarding or discarding traffic.
Verifying the VLANs on CS2
Purpose Verify the data channel logical interfaces and the VLAN IDs controlled by a ring instance
data channel.
Action List dynamic VLAN membership:
user@cs2> show protection-group ethernet-ring vlan
Ethernet ring IFBD parameters for protection group ring-1
Interface Vlan STP Index Bridge Domain
ge-2/0/4 200 44 default—switch/bd200
ge-2/0/8 200 45 default-switch/bd200
ge-2/0/4 300 44 default—switch/bd300
ge-2/0/8 300 45 default-switch/bd300
Ethernet ring IFBD parameters for protection group ring-2
175 Copyright © 2013, Juniper Networks, Inc.
Chapter 13: Ethernet Ring Protection