User guide

Chapter 5
Setup and Configuration
RUGGEDCOM ROS
User Guide
160 Configuring MAC Address Learning Options
• Configure the address on the device as a static MAC address. For more information, refer to Section 5.5.3.2,
“Adding a Static MAC Address”.
Section 5.5.2
Configuring MAC Address Learning Options
The MAC address learning options control how and when MAC addresses are removed automatically from the
MAC address table. Individual addressees are removed when the aging timer is exceeded. Addresses can also
be removed when a link failure or topology change occurs.
To configure the MAC address learning options, do the following:
1. Navigate to MAC Address Tables » Configure MAC Address Learning Options. The MAC Address
Learning Options form appears.
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Figure 111: MAC Address Learning Options Form
1. Aging Time Box 2. Age Upon Link Loss Options 3. Apply Button 4. Reload Button
2. Configure the following parameter(s) as required:
Parameter Description
Aging Time Synopsis: 15 to 800
Default: 300 s
This parameter configures the time that a learned MAC address is held before being
aged out.
Age Upon Link Loss Synopsis: { No, Yes }
Default: Yes
When set to Yes, all MAC addresses learned on a failed port will be aged-out
immediately upon link failure detection.
When link failure occurs the switch may have some MAC addresses previously learned
on the failed port. As long as those addresses are not aged-out the switch will still be
forwarding traffic to that port, thus preventing that traffic from reaching its destination via
the new network topology.
Note that when a network redundancy protocol, e.g. RSTP, is enabled on the switch,
that redundancy protocol may, upon a link failure, flush MAC addresses learned on the
failed port regardless of the setting of this parameter.
3. Click Apply.