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FA4800 User Manual
Release 1.9.30
13-1
Chapter 13
The Ceragon Ethernet
Ring
Scope
The description of Ceragon Ethernet Ring in this Chapter is completely
generic: Both FA4800 and FibeAir 2000 links may participate in an Ethernet
ring.
What is an Ethernet Ring
An Ethernet ring consists of several nodes connected by hops (links). Loops
are not allowed with Ethernet; therefore one hop is a Ring Protection
Link (RPL) which “blocks” Ethernet traffic. In the event of failure in the
ring, the Ring Protection Link unblocks and Ethernet traffic in the ring is
restored.
Some terminology:
• Normal State – all member links are functional except the RPL
which is blocked.
• Blocked - the air-link is up but Ethernet traffic is not transmitted
across the link. The Ethernet service panel for the RPL in the
FibeAir2000 Manager is labeled Idle
• Unblocked - Ethernet traffic is transmitted across the RPL. The
Ethernet service panel for the RPL in the FibeAir2000 Manager is
labeled Active
• Protection State – a member link is broken and the RPL passes
Ethernet traffic
• Ring Protection Link - as described above
• Ring Link - any member link controlled by the RPL
Caution
VLAN IDs are used by Ceragon products in three separate contexts:
Management VLAN, Traffic VLAN and Ethernet Ring. It is recommended that
you use different VLAN IDs for each context.