Cisco Catalyst 3560-X Software Configuration Manual page 1139

Chapter 1 Configuring IP Unicast Routing
Command
Step 7
show cef linecard [detail]
or
show cef linecard [slot-number] [detail]
Step 8 show cef interface [interface-id]
Step 9 show adjacency
Step 10
copy running-config startup-config
Configuring the Number of Equal-Cost Routing Paths
When a router has two or more routes to the same network with the same metrics, these routes can be
thought of as having an equal cost. The term parallel path is another way to see occurrences of equal-cost
routes in a routing table. If a router has two or more equal-cost paths to a network, it can use them
concurrently. Parallel paths provide redundancy in case of a circuit failure and also enable a router to
load balance packets over the available paths for more efficient use of available bandwidth. Equal-cost
routes are supported across switches in a stack.
Even though the router automatically learns about and configures equal-cost routes, you can control the
maximum number of parallel paths supported by an IP routing protocol in its routing table. Although the
switch software allows a maximum of 32 equal-cost routes, the switch hardware will never use more than
16 paths per route.
Beginning in privileged EXEC mode, follow these steps to change the maximum number of parallel
paths installed in a routing table from the default:
Command
Step 1
configure terminal
Step 2 router {bgp | rip | ospf | eigrp}
Step 3 maximum-paths maximum
Step 4 end
Step 5 show ip protocols
Step 6
copy running-config startup-config
Use the no maximum-paths router configuration command to restore the default value.
OL-25303-03
Purpose
Display CEF-related interface information on a Catalyst
3560-X switch, or
Display CEF-related interface information on a Catalyst
3750-X switch by stack member for all switches in the stack or
for the specified switch.
(Optional) For slot-number, enter the stack member switch
number.
Display detailed CEF information for all interfaces or the
specified interface.
Display CEF adjacency table information.
(Optional) Save your entries in the configuration file.
Purpose
Enter global configuration mode.
Enter router configuration mode.
Set the maximum number of parallel paths for the protocol routing
table. The range is from 1 to 16; the default is 4 for most IP routing
protocols, but only 1 for BGP.
Return to privileged EXEC mode.
Verify the setting in the Maximum path field.
(Optional) Save your entries in the configuration file.
Catalyst 3750-X and 3560-X Switch Software Configuration Guide
Configuring Protocol-Independent Features
1-93