Administrator Guide

Concept Explanation
Ring Status The state of the FRRP ring. During initialization/configuration, the default ring status is Ring-down (disabled). The
Primary and Secondary interfaces, control VLAN, and Master and Transit node information must be configured for
the ring to be up.
• Ring-Up — Ring is up and operational.
• Ring-Down — Ring is broken or not set up.
Ring Health-
Check Frame
(RHF)
The Master node generates two types of RHFs. RHFs never loop the ring because they terminate at the Master
node’s secondary port.
• Hello RHF (HRHF) — These frames are processed only on the Master node’s Secondary port. The Transit
nodes pass the HRHF through without processing it. An HRHF is sent at every Hello interval.
• Topology Change RHF (TCRHF) — These frames contains ring status, keepalive, and the control and
member VLAN hash. The TCRHF is processed at each node of the ring. TCRHFs are sent out the Master
Node’s Primary and Secondary interface when the ring is declared in a Failed state with the same sequence
number, on any topology change to ensure that all Transit nodes receive it. There is no periodic transmission of
TCRHFs. The TCRHFs are sent on triggered events of ring failure or ring restoration only.
FRRP Configuration
These are the tasks to configure FRRP.
• Creating the FRRP Group
• Configuring the Control VLAN
• Configure Primary and Secondary ports
• Configuring and Adding the Member VLANs
• Configure Primary and Secondary ports
Other FRRP related commands are:
• Clearing the FRRP Counters
• Viewing the FRRP Configuration
• Viewing the FRRP Information
Creating the FRRP Group
Create the FRRP group on each switch in the ring.
To create the FRRP group, use the command.
• Create the FRRP group with this Ring ID.
CONFIGURATION mode
protocol frrp ring-id
Ring ID: the range is from 1 to 255.
Configuring the Control VLAN
Control and member VLANS are configured normally for Layer 2. Their status as control or member is determined at the FRRP group
commands.
For more information about configuring VLANS in Layer 2 mode, refer to Layer 2.
Be sure to follow these guidelines:
• All VLANS must be in Layer 2 mode.
• You can only add ring nodes to the VLAN.
• A control VLAN can belong to one FRRP group only.
• Tag control VLAN ports.
• All ports on the ring must use the same VLAN ID for the control VLAN.
• You cannot configure a VLAN as both a control VLAN and member VLAN on the same ring.
• Only two interfaces can be members of a control VLAN (the Master Primary and Secondary ports).
Force10 Resilient Ring Protocol (FRRP)
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