Verification
Toconfirm that the ERP configurationfor multiple ring instances is operating,perform
thesetasks:
Verifyingthe Ethernet Protection Ring on CS1 on page166
Verifyingthe Data Channel CS1 on page 166
Verifyingthe VLANs on CS1 on page 167
Verifyingthe Ethernet Protection Ring on CS2 on page167
Verifyingthe Data Channel CS2 on page 168
Verifyingthe VLANs on CS2 on page 168
Verifyingthe Ethernet Protection Ring on AS1on page 169
Verifyingthe Data Channels on AS1 on page169
Verifyingthe VLANs on AS1 on page 170

Verifyingthe Ethernet Protection Ring on CS1

Purpose Verifythat ERP is enabled on CS1.
Action Showthe status of the ring automatic protectionswitching (R-APS) messages to
determineif there is a ring failure:
user@cs1>showprotection-group ethernet-ring aps
Ethernet Ring Name Request/state No Flush Ring Protection Originator Remote
Node ID
Link Blocked
ring-1 NR No Yes Yes
ring-2 NR No Yes No
13:22:af:31:fc:00
Meaning Theoutputdisplayed shows that protectiongroups ring-1 and ring-2 have a Request/state
ofNR, meaning there is no requestfor APS on the ring. If a Request/stateof SF is displayed,
itindicates there is a signal failure on the ring. The output alsoshows that the ring
protectionlink is not blocked. The NoFlush fielddisplays No, indicating that MAC
addresseswill be flushed when the ring nodes receive this messagefirst time. A value of
Yeswould indicateMAC address flushing is not needed. The Originator fieldfor ring-1
dispaysyes, indicating that this node is an R-APS originator.

Verifyingthe Data Channel CS1

Purpose Verifythe forwarding stateof the data channel.
Action Listthe interfaces acting as the controlchannels and their respective data channels
(representedby the Spanning TreeProtocol (STP) index number):
user@cs1>showprotection-group ethernet-ring data-channel
Ethernet ring data channel parameters for protection group ring-1
Interface STP index Forward State
ge-3/2/4 122 forwarding
Copyright© 2010, Juniper Networks,Inc.166
Junos10.4 MX Series Ethernet ServicesRouters Solutions Guide