Source Learning Specifications Managing Source Learning
page 1-2 OmniSwitch 6800/6850/9000 Network Configuration Guide March 2008
Source Learning Specifications
Source Learning Defaults
Sample MAC Address Table Configuration
The following steps provide a quick tutorial that will create a static MAC address and change the MAC
address aging timer for VLAN 200:
Note. Optional. Creating a static MAC address involves specifying an address that is not already used in
another static entry or already dynamically learned by the switch. To determine if the address is already
known to the MAC address table, enter show mac-address-table. If the address does not appear in the
show mac-address-table output, then it is available to use for configuring a static MAC address entry. For
example,
-> show mac-address-table
Legend: Mac Address: * = address not valid
Vlan Mac Address Type Protocol Operation Interface
------+-------------------+--------------+-----------+------------+-----------
1 00:00:00:00:00:01 learned 0800 bridging 8/ 1
1 00:d0:95:6a:73:9a learned aaaa0003 bridging 10/23
Total number of Valid MAC addresses above = 2
The show mac-address-table command is also useful for monitoring general source learning activity and
verifying dynamic VLAN assignments of addresses received on mobile ports.
RFCs supported 2674—Definitions of Managed Objects for Bridges
with Traffic Classes, Multicast Filtering and
Virtual LAN Extensions
IEEE Standards supported 802.1Q—Virtual Bridged Local Area Networks
802.1D—Media Access Control Bridges
Maximum number of learned MAC addresses when
synchronized MAC source learning mode is enabled
OmniSwitch 9000 Series = 16K per chassis
OmniSwitch 6800 Series = 16K per stack
OmniSwitch 6850 Series = 16K per stack
Maximum number of learned MAC addresses per
OmniSwitch 9000 when distributed MAC source
learning mode is enabled.
16K per module; up to 64K per chassis.
Note: Distributed MAC source learning mode is not
supported on OmniSwitch 6800 and 6850 switches.
Parameter Description Command Default
Static MAC address management status mac-address-table permanent
Static MAC address operating mode mac-address-table bridging
MAC address aging timer mac-address-table aging-time 300 seconds
MAC source learning mode source-learning chassis-distributed synchronized