Cisco nexus 5000 series Configuration Manual page 254

Configuring Flex Link Preemption
SUMMARY STEPS
1. switch# configure terminal
2. switch(config) # interface ethernet 1/48 slot/port
3. switch(config-if) # switchport backup interface ethernet slot/port
4. switch(config-if) # switchport backup interface ethernet slot/port preemption mode [ bandwidth |
forced | off ]
5. switch(config-if) # switchport backup interface ethernet slot/port preemption delay delay-time
6. (Optional) switch(config-if) # end
7. (Optional) switch# show interface interface-id switchport backup
8. (Optional) switch# copy running-config startup-config
DETAILED STEPS
Command or Action
Step 1 switch# configure terminal
Step 2 switch(config) # interface ethernet 1/48
slot/port
Step 3 switch(config-if) # switchport backup
interface ethernet slot/port
Step 4 switch(config-if) # switchport backup
interface ethernet slot/port preemption
mode [ bandwidth | forced | off ]
Step 5 switch(config-if) # switchport backup
interface ethernet slot/port preemption
delay delay-time
Step 6 switch(config-if) # end
Cisco Nexus 5000 Series NX-OS Layer 2 Switching Configuration Guide, Release 5.1(3)N1(1)
234
Purpose
Enters global configuration mode.
Specifies the Ethernet interface and enters interface configuration mode.
The interface is a physical Layer 2 interface or a port channel (logical
interface).
The slot/port range is from 1 to 48.
Configures a physical Layer 2 interface (or port channel) as part of a
Flex Link pair with the interface. When one link is forwarding traffic,
the other interface is in standby mode.
Configures a physical Layer 2 interface (Ethernet or port channel) as
part of a flex link pair. When one link is forwarding traffic the other
interface is in standby mode.
Configure a preemption mechanism and delay for a Flex link interface
pair. You can configure the preemption as:
• bandwidth—Interface with higher bandwidth always acts as the
active interface
• forced—Active interface always preempts the backup
• off—No preemption happens from active to backup
Configure the delay time until a port preempts another port. The default
preemption delay is 35 seconds.
Note Setting a delay time only works with forced and bandwidth
modes.
(Optional)
Return to privileged EXEC mode.
Configuring Flex Links
OL-25842-01