13-14
Catalyst 6500 Series Switch Software Configuration Guide—Release 8.7
OL-8978-04
Chapter 13 Configuring CEF for PFC2 and PFC3A
Configuring CEF for PFC2/PFC3A on the Switch
Note When the ingress encapsulation for IPX traffic is SAP1, CEF for PFC2 provides Layer 3
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)
CEF for PFC2/PFC3A does not provide Layer 3 switching for an IP multicast flow in the following
cases:
• 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.*.
Note Groups in the 224.0.0.* range are reserved for routing control packets and must be flooded
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.
Configuring CEF for PFC2/PFC3A on the Switch
These sections describe how to configure CEF for PFC2/PFC3A:
• 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
Note For information on configuring routing on MSFC2/MSFC3, see Chapter 12, “Configuring InterVLAN
Routing.”
To Next Page
Loading...
Need help?
General