Now that you have completed this
chapter, you should a have a firm understanding of the following
concepts:
- The Cisco multilayer switching
implementation consists of a Multilayer Switching-Switching
Engine, a Multilayer Switching-Route Processor, and a Multilayer
Switching Protocol.
- The MLS-RP uses multicast Layer
3-hello messages to inform the MLS-SE of the MAC addresses that
are participating in MLS, access list information, and routing
table updates and changes.
- The MLS-SE maintains a cache for
MLS flows and stores statistics for each flow.
- MLS-SE distinguishes the MAC
address entries of each MLS-RP by assigning an XTAG value to
these addresses.
- To create an MLS cache entry, the
MLS-SE must detect both the candidate and enable packet for a
specific flow.
- The MLS-SE uses flow mask modes to
determine how MLS entries are created in the MLS cache. MLS-SE
supports only one flow mask for all MLS-RPs that are serviced by
the MLS-SE.
- Access lists affect how MLS cache
entries are created and maintained.
- MLS is enabled by default on the
Catalyst series switches that support Layer 3 switching.
- When Layer 3 switching is enabled,
the MLS-RP still runs all the routing protocols and maintains a
real-time routing table. Changes to the routing table may affect
the behavior of MLS.
- MLS is enabled by default without
any MLS configuration on the Catalyst 6000 Series Switch with
the MSFC or MSFC II.
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