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Chapter 13
Configuring CEF for PFC2 and PFC3A
Table 13-2
Feature
CEF for PFC2 enable state
CEF enable state on MSFC2/MSFC3
Multicast services (IGMP snooping)
Multicast services (GMRP)
Multicast routing on MSFC2/MSFC3
PIM routing on MSFC2/MSFC3
IP MMLS Threshold
IP MMLS
CEF for PFC2/PFC3A Configuration Guidelines and Restrictions
With Supervisor Engine 720 (MSFC3), IPX routing is done through the software.
Note
This section describes the guidelines and restrictions for configuring CEF for PFC2/PFC3A:
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OL-8978-04
Default CEF for PFC2/PFC3A Configuration
PFC2 supports a maximum of 16 unique Hot Standby Router Protocol (HSRP) group numbers. You
can use the same HSRP group numbers in different VLANs. If you configure more than 16 HSRP
groups, this restriction prevents use of the VLAN number as the HSRP group number.
Identically numbered HSRP groups use the same virtual MAC address, which might cause
Note
errors if you configure bridging on the MSFC.
Because of the restriction to 16 unique HSRP group numbers, CEF for PFC2 cannot support the
standby use-bia HSRP command.
PFC3A supports 256 HSRP groups.
CEF for PFC2 supports the following ingress and egress encapsulations:
CEF for PFC3A supports Ethernet V2.0 (ARPA) only.
Note
For IP unicast:
–
Ethernet V2.0 (ARPA)
802.3 with 802.2 with 1 byte control (SAP1)
802.3 with 802.2 and SNAP
For IPX:
–
Ethernet V2.0 (ARPA)
802.3 (raw)
802.2 with 1 byte control (SAP1)
SNAP
CEF for PFC2/PFC3A Configuration Guidelines and Restrictions
Default Value
Enabled (cannot be disabled)
Enabled (cannot be disabled)
Enabled
Disabled
Disabled globally
Disabled on all interfaces
Unconfigured—no default value
Enabled when multicast routing is enabled and
IGMP snooping is enabled
Catalyst 6500 Series Switch Software Configuration Guide—Release 8.7
13-13
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