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Catalyst 6500 Series Switch Software Configuration Guide—Release 8.7
OL-8978-04
Chapter 14 Configuring MLS
Default MLS Configuration
When Host A initiates a file transfer to Host B, an IPX MLS entry for this flow is created (this entry is
the first item in the table shown in Figure 14-1). The PFC stores the MAC addresses of the MSFC and
Host B in the IPX MLS entry when the MSFC forwards the first packet from Host A through the switch
to Host B. The PFC uses this information to rewrite the subsequent packets from Host A to Host B.
Similarly, a separate IPX MLS entry is created in the MLS cache for the traffic from Host A to Host C,
and for the traffic from Host C to Host A. The destination VLAN is stored as part of each IPX MLS entry
so that the correct VLAN identifier is used when encapsulating traffic on the trunk links.
Figure 14-2 IPX MLS Example Topology
Default MLS Configuration
Table 14-1 shows the default IP MLS configuration.
Table 14-1 Default IP MLS Configuration
Feature Default Value
IP MLS enable state Enabled
IP MLS aging time 16 seconds
IP MLS fast aging time 0 seconds (no fast aging)
IP MLS fast aging-time packet threshold 0 packets
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