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Configuring CEF for PFC2/PFC3A on the Switch
CEF for PFC2/PFC3A does not provide Layer 3 switching for an IP multicast flow in the following
cases:
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Configuring CEF for PFC2/PFC3A on the Switch
These sections describe how to configure CEF for PFC2/PFC3A:
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For information on configuring routing on MSFC2/MSFC3, see
Note
Routing."
Catalyst 6500 Series Switch Software Configuration Guide—Release 8.7
13-14
When the ingress encapsulation for IPX traffic is SAP1, CEF for PFC2 provides Layer 3
Note
switching only when the egress encapsulation is also SAP1. MSFC2 routes IPX SAP1
traffic that requires an encapsulation change.
For IP multicast—Ethernet V2.0 (ARPA)
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For IP multicast groups that fall into the range 224.0.0.* (where * is in the range 0–255), which is
used by routing protocols. CEF for PFC2/PFC3A supports 225.0.0.* through 239.0.0.* and
224.128.0.* through 239.128.0.*.
Groups in the 224.0.0.* range are reserved for routing control packets and must be flooded
Note
to all forwarding ports of the VLAN. These addresses map to the multicast MAC address
range 01-00-5E-00-00-xx, where xx is in the range 0–0xFF.
For PIM auto-RP multicast groups (IP multicast group addresses 224.0.1.39 and 224.0.1.40).
Note
In systems with redundant MSFC2s/MSFC3s, the PIM interface configuration must be the
same on both the active and the redundant MSFC2/MSFC3.
If the shortest-path tree (SPT) bit for the flow is cleared when running PIM sparse mode for the
interface or group.
For fragmented IP packets and packets with IP options. However, packets in the flow that are not
fragmented or that do not specify IP options are multilayer switched.
For source traffic that is received on tunnel interfaces (such as MBONE traffic).
For any RPF interface with multicast tag switching enabled.
Displaying the Layer 3-Switching Entries on the Supervisor Engine, page 13-15
Configuring CEF on MSFC2/MSFC3, page 13-16
Specifying CEF Maximum Routes, page 13-16
Configuring IP Multicast on MSFC2/MSFC3, page 13-18
Displaying IP Multicast Information, page 13-20
Chapter 13
Configuring CEF for PFC2 and PFC3A
Chapter 12, "Configuring InterVLAN
OL-8978-04
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