xStack® DGS-3120 Series Managed Switch Web UI Reference Guide
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The following rules also apply to the above roles:
•
Each device begins in a Candidate state.
•
CSs must change their role to CaS and then to MS, to become a MS of a SIM group. Thus, the CS cannot
directly be converted to a MS.
•
The user can manually configure a CS to become a CaS.
•
A MS can become a CaS by:
o
Being configured as a CaS through the CS.
o
If report packets from the CS to the MS time out.
•
The user can manually configure a CaS to become a CS
•
The CaS can be configured through the CS to become a MS.
After configuring one switch to operate as the CS of a SIM group, additional DGS-3120 Series switches may join
the group by manually configuring the Switch to be a MS. The CS will then serve as the in band entry point for
access to the MS. The CS’s IP address will become the path to all MS’s of the group and the CS’s Administrator’s
password, and/or authentication will control access to all MS’s of the SIM group.
With SIM enabled, the applications in the CS will redirect the packet instead of executing the packets. The
applications will decode the packet from the administrator, modify some data, and then send it to the MS. After
execution, the CS may receive a response packet from the MS, which it will encode and send it back to the
administrator.
When a CaS becomes a MS, it automatically becomes a member of the first SNMP community (includes read/write
and read only) to which the CS belongs. However, if a MS has its own IP address, it can belong to SNMP
communities to which other switches in the group, including the CS, do not belong.
To better improve SIM management, the DGS-3120 Series switches have been upgraded to version 1.61 in this
release. Many improvements have been made, including:
Upgrade to v1.61
1. The Commander Switch (CS) now has the capability
to automatically rediscover member switches that
have left the SIM group, either through a reboot or
web malfunction. This feature is accomplished
through the use of Discover packets and Maintenance
packets that previously set SIM members will emit
after a reboot. Once a MS has had its MAC address
and password saved to the CS’s database, if a reboot
occurs in the MS, the CS will keep this MS
information in its database and when a MS has been
rediscovered, it will add the MS back into the SIM tree
automatically. No configuration will be necessary to
rediscover these switches.
There are some instances where pre-saved MS switches
cannot be rediscovered. For example, if the Switch is still
powered down, if it has become the member of another group,
or if it has been configured to be a Commander Switch, the
rediscovery process cannot occur.
2. The topology map now includes new features for connections that are a member of a port trunking group. It
will display the speed and number of Ethernet connections creating this port trunk group, as shown in the
adjacent picture.
3. This version will support switch upload and downloads for firmware, configuration files and log files, as
follows:
a.
Firmware
– The switch now supports MS firmware downloads from a TFTP server.
b.
Configuration Files
– This switch now supports downloading and uploading of configuration files both
to (for configuration restoration) and from (for configuration backup) MS’s, using a TFTP server.
Summary of Contents for DGS-3120-24PC-EI
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