Allied Telesis AT-8700XL User Manual
32
Switching Enhancements
Release Note
Software Version 2.8.1
C613-10477-00 REV B
C613-10477-00 REV B
Change of Debug Command Syntax
This Software Version includes a change in syntax for the enable switch debug
and disable switch debug commands. To enable or disable debugging on the
switch chip operations, you now use the dev option. Previously, this type of
debugging was enabled or disabled using the m6 parameter. There is no
change in the style or type of debugging information displayed.
and disable switch debug commands. To enable or disable debugging on the
switch chip operations, you now use the dev option. Previously, this type of
debugging was enabled or disabled using the m6 parameter. There is no
change in the style or type of debugging information displayed.
To enable debugging of the switch chip operations, use the command:
enable switch debug=dev [other options]
To disable debugging of the switch chip operations, use the command:
disable switch debug=dev
Command Changes
The following table summarises the modified commands:
Enhanced Static Switch Filtering on Ports within a
Trunk Group
Trunk Group
This Software Version ensures that traffic flow is not interrupted when a port
within a trunk group goes link-down.
within a trunk group goes link-down.
In previous Software Versions, when a port that is part of a trunk group goes
link-down, the router or switch drops any traffic that is forwarded by a static
switch filter out of that port.
link-down, the router or switch drops any traffic that is forwarded by a static
switch filter out of that port.
In this Software Version, when a port that is part of a trunk group goes
link-down, the router or switch modifies any static switch filters defined to
forward traffic out of that port. It modifies the egress port for the switch filter
entry to a port which is link-up within the trunk group. This ensures that traffic
can flow without interruption despite the original port going link-down.
link-down, the router or switch modifies any static switch filters defined to
forward traffic out of that port. It modifies the egress port for the switch filter
entry to a port which is link-up within the trunk group. This ensures that traffic
can flow without interruption despite the original port going link-down.
Command Changes
This expansion does not affect any commands.
Ethernet Protection Switching Ring (EPSR)
EPSR is a protection system employed to prevent loops and provide high
resiliency within Ethernet ring based topologies. It offers:
resiliency within Ethernet ring based topologies. It offers:
■
A rapid detection and recovery time (in the order of 50 ms, depending on
configuration) if a link or node fails.
configuration) if a link or node fails.
■
A faster and more effective alternative to spanning tree based options
when creating resilient ring networks.
when creating resilient ring networks.
Information about EPSR and its commands is shown in the EPSR chapter.
Command
Change
New dev option in debug parameter.
New dev option in debug parameter.
New DEV option in output.