23 x-ring – Allied Telesis AT-IFS802SP/POE User Manual
Page 67
63
AT-IFS802SP/POE(W)-80 User Manual
The switch support IP multicast, you can enable IGMP protocol on web management’s switch setting
advanced page, then the IGMP snooping information displays. IP multicast addresses range are from
224.0.0.0 through 239.255.255.255.
IGMP Protocol
•
: enable or disable the IGMP protocol.
IGMP Query
•
: enable or disable the IGMP query function. The IGMP query information will be
displayed in IGMP status section.
Click .
•
Apply
IGMP Configuration interface
6.23 X-Ring
X-Ring provides a faster redundant recovery than Spanning Tree topology. The action is similar to STP
or RSTP, but the algorithms between them are not the same. In the X-Ring topology, every switch
should be enabled with X-Ring function and two ports should be assigned as the member ports in
the ring. Only one switch in the X-Ring group would be set as the master switch that one of its two
member ports would be blocked, called backup port, and another port is called working port. Other
switches in the X-Ring group are called working switches and their two member ports are called
working ports. When the failure of network connection occurs, the backup port of the master switch
(Ring Master) will automatically become a working port to recover from the failure.
The switch supports the function and interface for setting the switch as the ring master or not. The
ring master can negotiate and place command to other switches in the X-Ring group. If there are 2 or
more switches in master mode, the software will select the switch with lowest MAC address number
as the ring master. The X-Ring master ring mode can be enabled by setting the X-Ring configuration
interface. Also, the user can identify whether the switch is the ring master by checking the R.M. LED
indicator on the panel of the switch.
The system also supports the
Couple Ring that can connect 2 or more X-Ring group for the
redundant backup function;
Dual Homing function that can prevent connection lose between X-Ring
group and upper level/core switch.