Specifications

ALAXALA Ring Configuration Guide (Edition 1)
Copyright © 2008, ALAXALA Networks Corporation. All rights reserved.
20
No. Item Supported specifications
Chassis-type Box-type
Remarks
10 Format Proprietary format
11 Health-check frame
12
Control frame
Supported control frame
Flush control frame
The destination MAC address of a
control frame is the MAC address
of the ALAXALA device with the
multicast bit.
13 Ring failure monitoring method
Monitoring is performed by
periodically circulating and receiving
health-check frames.
14
Health-check frame
sending interval
[Initial value]
100 ms
[Setting range]
10 ms to 10 s
[Initial value]
1000 ms
[Setting range]
500 ms to 60 s
The master and shared nodes send
HC frames. The same sending
interval and setting range are
applied.
15
Failure monitoring time
(Hold time until a failure
is detected)
[Initial value]
256 ms
[Setting range]
32 to 12288 ms
[Initial value]
3000 ms
[Setting range]
500 ms to 300 s
This is the period until the master
node determines that a failure has
occurred based on an unreachable
health-check frame.
16 Ring failure recovery monitoring method
Monitoring is performed by
periodically circulating and receiving
health-check frames. A recovery
operation is performed immediately
after frames are received.
17 Switching method for a node in the ring
Switching is performed by flush
control frames sent when the master
node detects a failure or recovery
from a failure.
18 Flush control frame
[Number of times frames are sent]
Initial value: 3
Setting range: 1 to 10
If flush control frames are discarded
on the way, downed communication
cannot be recovered. To avoid this,
this frame is sent several times to
ensure that the frame is reached.
The time is determined by the node configuration in the ring.
19
Failure
recovery time
Failure recovery
time
Chassis-type only: A minimum of 50 ms
Box-type only: 2000 ms
Chassis-type/box-type mixed: 1870 ms
This value defines the period from
the time when a ring failure occurs
to the time when the MAC address
tables are cleared on each node in
the ring (i.e., when flooding starts).
20 Load balancing method
Possible when two ring VLAN groups are
used
21
Master node problem fix
functionality
Supported
22
Multiple failures detection
functionality
Not supported
23
Third-party node mixed
configuration
Not supported
24
Operation with mixed node types
within a single device
Supported
If a device belongs to two different
rings, the device can perform the
master node operation in one ring
and the transit node operation in the
other ring.
25 H/W assistance functionality Available Not available
[Only available in chassis-type
switches]
Main assistance functions:
failure/recovery monitoring, control
frame sending, FWD/BLK setting
for ring VLAN groups, and forced
flooding initiation