Process monitor, Hardware abstraction layer and drivers, Redundancy – Brocade Mobility RFS7000-GR Controller System Reference Guide (Supporting software release 4.1.0.0-040GR and later) User Manual
Page 19: Secure network time protocol (sntp)
Brocade Mobility RFS7000-GR Controller System Reference Guide
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Software overview
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Log message format is similar to the format used by syslog messages (RFC 3164). Log messages
include message severity, source (facility), the time the message was generated and a textual
message describing the situation triggering the event. For more information on using the switch
logging functionality, see
Process monitor
The switch Process Monitor checks to ensure processes under its control are up and running. Each
monitored process sends periodic heartbeat messages. A process that is down (due to a software
crash or stuck in an endless loop) is detected when its heartbeat is not received. Such a process is
terminated (if still running) and restarted (if configured) by the Process Monitor.
Hardware abstraction layer and drivers
The Hardware Abstraction Layer (HAL
)
provides an abstraction library with an interface hiding
hardware/platform specific data. Drivers include platform specific components such as Ethernet,
Flash Memory storage and thermal sensors.
Redundancy
Using the switch redundancy, up to 12 switches can be configured in a redundancy group (and
provide group monitoring). In the event of a switch failure, an existing cluster member assumes
control. Therefore, the switch supported network is always up and running even if a switch fails or is
removed for maintenance or a software upgrade.
The following redundancy features are supported:
•
Up to 12 switch redundancy members are supported in a single group. Each member is
capable of tracking statistics for the entire group in addition to their own.
•
Each redundancy group is capable of supporting an Active/Active configuration responsible for
group load sharing.
•
Members within the same redundancy group can be deployed across different subnets.
•
APs are load balanced across members of the group.
•
Licenses are aggregated across the group. When a new member joins the group, the new
member can leverage the Access Port adoption license(s) of existing members.
•
Each member of the redundancy group (including the reporting switch) is capable of displaying
cluster performance statistics for all members in addition to their own.
•
Centralized redundancy group management using the switch CLI.
For more information on configuring the switch for redundancy support, see
“Configuring switch redundancy & clustering”
Secure Network Time Protocol (SNTP)
Secure Network Time Protocol (SNTP) manages time and/or network clock synchronization within
the switch managed network. SNTP is a client/server implementation. The switch (a SNTP client)
periodically synchronizes its clock with a master clock (an NTP server). For example, the switch
resets its clock to 07:04:59 upon reading a time of 07:04:59 from its designated NTP server. Time
synchronization is recommended for the switch’s network operations. The following holds true:
•
The switch can be configured to provide NTP services to NTP clients.