Allied Telesis SwitchBlade x3100 Series - Configuring Epsr

Configuring EPSR Introduction
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Software Reference for SwitchBlade x3100 Series Switches (Layer Two Switching)
4.6.7 Configuring EPSR
4.6.7.1 Default Configuration
When an SBx3112 switch is initially booted up, EPSR will be configured as follows:
• There are no EPSR domains configured.
• EPSR+/++ is not active (ENHANCEDRECOVERY=OFF).
• EPSR+/++ survives restarts and upgrades.
4.6.7.2 Configuration Guidelines
•
For the SBx3112, a maximum of 64 domains can be provisioned for EPSR.
• When provisioning EPSR on a ring, the user should avoid creating any network loops. There are many ways
to configure a network in a ring topology without producing a loop within the network. Some of approaches
can involve disabling one of the ring's links while configuring the EPSR domains and the protected VLANs;
however, disabling one of the ring's links may not be an acceptable approach because doing so removes the
ring's redundancy while provisioning.
• When provisioning a system, the user can fill in the attributes “name” and “location” to identify the system.
These are for administrative purposes and do not affect the working of EPSR.
• To prevent failure at the card level, the SP and PP ports should be configured on different cards.
• Because of MAC Thrash Limiting, there is a further restriction to using different cards for the PP and SP
ports on the Master Node:
• If the EPSR+/++ feature is configured (refer to 4.6.6), you must use different cards for the SP and PP
ports.
• If the SP and PP ports are configured on the same card, you cannot use the EPSR+/++ feature.
Note: With the MAC Thrash Limiting Feature, just one duplicate MAC address on an intracard interface will
disable learning and cause VLAN flooding of traffic on EPSR ring ports. Also, with EPSR+/++, the
Transit Node sends the (same) LFR message to both the PP and SP of the Master Node. If the PP and
SP are on the same card of the Master Node, MAC Thrash Limiting will see this as a learning violation.
4.6.7.3 Feature Interactions for EPSR+/EPSR++
•
To work with other vender EPSR products based on the RFC3619 which do not recover from multiple link
failure, the CREATE EPSR or SET EPSR commands enable the feature on per EPSR instance. Moreover, this
feature must be enabled on the Master node and all Transit nodes (e.g., SET EPSR=ALL ENHANCEDRE-
COVERY=ON command); otherwise there may be side effects.
• The LFRP timer and LFR timing interval are fixed at 4 and 6 seconds respectively, and cannot be changed.