Extreme Networks Summit Summit24, Installation And User Manual

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Commands for Configuring and Monitoring EAPS
Summit24e3 Switch Installation and User Guide 123
Restoration Operations
The master node continues sending health-check packets out its primary port even when the master
node is operating in the failed state. As long as there is a break in the ring, the fail-period timer of the
master node will continue to expire and the master node will remain in the failed state.
When the broken link is restored, the master will receive its health-check packet back on its secondary
port, and will once again declare the ring to be complete. It will logically block the protected VLANs on
its secondary port, flush its FDB, and send a “flush FDB” message to its associated transit nodes.
During the time between when the transit node detects that the link is operable again and when the
master node detects that the ring is complete, the secondary port on the master node is still open and
data could start traversing the transit node port that just came up. To prevent the possibility of a such a
temporary loop, when the transit node detects that its failed link is up again, it will perform these steps:
1 For the port that just came up, put all the protected VLANs traversing that port into a temporary
blocked state.
2
Remember which port has been temporarily blocked.
3 Set the state to Preforwarding.
When the master node receives its health-check packet back on its secondary port, and detects that the
ring is once again complete, it sends a message to all its associated transit nodes to flush their
forwarding databases.
When the transit nodes receive the message to flush their forwarding databases, they perform these
steps:
1 Flush their forwarding databases on the protected VLANs.
2 If the port state is set to Preforwarding, unblock all the previously blocked protected VLANs for the
port.
Commands for Configuring and Monitoring EAPS
Table 29 lists the ExtremeWare EAPS commands. Each command is described in detail in the sections
that follow.
Table 29: EAPS Commands
Command Description
config eaps <name> mode [master | transit] Configures the switch as either the EAPS master
node or as an EAPS transit node for the
specified domain.
config eaps <name> [hellotime <seconds> |
failtime <seconds>] Configures the values of the polling timers the
master node uses for the EAPS health-check
packet that is circulated around the ring for the
specified EAPS domain.
config eaps <name> [primary | secondary]
port <port number> Configures a node port as the primary or
secondary port for the specified EAPS domain.
config eaps <name> [add | delete]
control vlan <name> Adds the specified control VLAN to the specified
EAPS domain, or deletes the specified control
VLAN from the specified EAPS domain.