Brocade 6910 Ethernet Access Switch Configuration Guide (Supporting R2.2.0.0) User Manual
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Brocade 6910 Ethernet Access Switch Configuration Guide
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Ethernet Ring Protection Switching
Once the ring has been activated, the configuration of the control VLAN cannot be modified.
Use the Admin Status parameter to stop the ERPS ring before making any configuration
changes to the control VLAN.
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Non-ERPS Device Protection – Sends non-standard health-check packets when an owner node
enters protection state without any link down event having been detected through Signal Fault
messages. (For more information on this feature, refer to the
command.
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Propagate TC – Enables propagation of topology change messages from a secondary ring to
the primary ring. (Default: Disabled)
When a secondary ring detects a topology change, it can pass a message about this event to
the major ring. When the major ring receives this kind of message from a secondary ring, it can
clear the MAC addresses on its ring ports to help the second ay ring restore its connections
more quickly through protection switching.
When the MAC addresses are cleared, data traffic may flood onto the major ring. The data
traffic will become stable after the MAC addresses are learned again. The major ring will not be
broken, but the bandwidth of data traffic on the major ring may suffer for a short period of time
due to this flooding behavior.
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Sub Domain – A secondary ERPS ring which uses this primary ring for sending control packets.
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Major Domain – The ERPS ring used for sending control packets.
This switch can support up to two rings. However, ERPS control packets can only be sent on
one ring. This parameter is used to indicate that the current ring is a secondary ring, and to
specify the major ring which will be used to send ERPS control packets.
The Ring Protection Link (RPL) is the west port and can not be configured. So the physical port
on a secondary ring must be the west port. In other words, if a domain has two physical ring
ports, this ring can only be a major ring, not a secondary ring (or sub-domain) which can have
only one physical ring port. The major domain therefore cannot be set if the east port is already
configured.
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West/East Port MEP – Specifies the CFM MEPs used to monitor the link on a ring node.
(Range: 1-8191)
To ensure complete monitoring of a ring node, specify the CFM MEPs used to monitor both the
east and west ports of the ring node.
If CFM MEPs are used to monitor the link status of an ERPS node with CFM continuity check
messages, then the MEG Level must match the authorized maintenance level of the CFM
domain to which the specified MEP belongs (see
“Configuring CFM Maintenance Domains”
If CFM determines that a MEP node which has been configured to monitor a ring port has gone
down, this information is passed to ERPS, which in turn processes it as a ring node failure.
Interface
To create an ERPS ring:
1. Click Administration, ERPS.
2. Select Configure Domain from the Step list.
3. Select Add from the Action list.
4. Enter a name for the ring in the “Domain Name” field.
5. Click Apply.