Configuring Hardware Layer 3 Switching - Cisco 6500 Series Software Configuration Manual

Chapter 17 Configuring IP Unicast Layer 3 Switching on Supervisor Engine 2

Configuring Hardware Layer 3 Switching

For information on configuring unicast routing on the MSFC2, see
Note
Interfaces."
Hardware Layer 3 switching is permanently enabled on Supervisor Engine 2 with PFC2, MSFC2, and
Distributed Feature Card (DFC). No configuration is required.
To display information about Layer 3-switched traffic, perform this task:
Command
Router# show interface {{type
{port-channel number}} | begin L3
1. type = ethernet, fastethernet, gigabitethernet, or tengigabitethernet
This example shows how to display information about hardware Layer 3-switched traffic on Fast
Ethernet port 3/3:
Router# show interface fastethernet 3/3 | begin L3
L3 in Switched: ucast: 0 pkt, 0 bytes - mcast: 12 pkt, 778 bytes mcast
L3 out Switched: ucast: 0 pkt, 0 bytes - mcast: 0 pkt, 0 bytes
<...output truncated...>
Router#
The Layer 3 switching packet count is updated approximately every five seconds.
Note
Cisco IOS CEF and dCEF are permanently enabled on the MSFC2. No configuration is required to
support hardware Layer 3 switching.
The Cisco IOS CEF ip load-sharing per-packet, ip cef accounting per-prefix, and ip cef accounting
non-recursive commands on the MSFC2 apply only to traffic that is CEF-switched in software on the
MSFC2. The commands do not affect traffic that is hardware Layer 3 switched on the PFC2 or on
DFC-equipped switching modules.
For information about Cisco IOS CEF and dCEF on the MSFC2, refer to these publications:
•
•
78-14099-04
1
slot/port} |
4046399 packets input, 349370039 bytes, 0 no buffer
Received 3795255 broadcasts, 2 runts, 0 giants, 0 throttles
The "Cisco Express Forwarding" section at this URL:
http//www.cisco.com/univercd/cc/td/doc/product/software/ios121/121cgcr/switch_c/xcprt2/index.
htm
The Cisco IOS Switching Services Command Reference publication at this URL:
http//www.cisco.com/univercd/cc/td/doc/product/software/ios121/121cgcr/switch_r/index.htm
Catalyst 6500 Series Switch Cisco IOS Software Configuration Guide—Release 12.1 E
Purpose
Displays a summary of Layer 3-switched traffic.
Configuring Hardware Layer 3 Switching
Chapter 12, "Configuring Layer 3
17-5