Cisco LAN Switching Fundamentals

MLS on Catalyst 6500

Supervisor 1 with MSFC1/2 with PFC 1 can do MLS internally. MLS on the Catalyst 6500 is enabled by default. No configuration changes are necessary on MSFC or the Catalyst switch. The communication between MSFC and PFC is done via Serial Communication Protocol (SCP). PFC handles all the shortcuts created. It can store up to 128 K entries, but typically, the range is in the 30–40 K entries. If many entries are in the MLS table, the timers can be tuned to flush some of the older entries from the table. Naturally, this puts more stress on the switch because it has to repopulate the table periodically. Using the Fast Aging Timer feature, set mls agingtime fast, allows for a more manageable MLS table. To disable MLS for a VLAN, ...