Default Hardware Layer 3 Switching Configuration; Layer 3 Switching Configuration Guidelines And Restrictions - Cisco 6500 Series Software Configuration Manual

Default Hardware Layer 3 Switching Configuration

Default Hardware Layer 3 Switching Configuration
Table 17-1
Table 17-1 Default Hardware Layer 3 Switching Configuration
Feature
Hardware Layer 3 switching enable state
Cisco IOS CEF enable state on MSFC2
Cisco IOS dCEF
IGMP
Multicast routing on MSFC2
PIM
IP multicast Layer 3 switching threshold
IP multicast Layer 3 switching
1. dCEF = Distributed Cisco Express Forwarding
2. IGMP = Internet Group Management Protocol
3. PIM = Protocol Independent Multicast

Layer 3 Switching Configuration Guidelines and Restrictions

Follow these guidelines and restrictions when configuring hardware Layer 3 switching:
•
•
Note With Release 12.1(11b)E and later, when you are in configuration mode you can enter EXEC mode-level
commands by entering the do keyword before the EXEC mode-level command.
Catalyst 6500 Series Switch Cisco IOS Software Configuration Guide—Release 12.1 E
17-4
shows the default hardware Layer 3 switching configuration.
1
enable state on MSFC2
2
snooping
3
routing on MSFC2
The PFC2 supports a maximum of 16 unique Hot Standby Routing 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 bridge groups.
Hardware Layer 3 switching supports the following ingress and egress encapsulations:
Ethernet V2.0 (ARPA)
–
802.3 with 802.2 with 1 byte control (SAP1)
–
802.3 with 802.2 and SNAP
–
Chapter 17 Configuring IP Unicast Layer 3 Switching on Supervisor Engine 2
Default Value
Enabled (cannot be disabled)
Enabled (cannot be disabled)
Enabled (cannot be disabled)
Enabled
Disabled globally
Disabled on all Layer 3 interfaces
Unconfigured—no default value
Enabled when multicast routing is enabled and IP
PIM is enabled on the interface
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