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Cisco Catalyst 2960 Series User Manual

Cisco Catalyst 2960 Series
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Restrictions for NetFlow Lite
The following are restrictions for NetFlow Lite:
Flow Record restrictions:
When a flow monitor has collect interface output as the collect field in the flow record, the field will
return a value of NULL when a flow gets created for any of the following addresses:
L3 broadcast
L2 broadcast
L3 Multicast
L2 Multicast
L2 unknown destination.
Monitor restrictions:
Monitor attachment is only supported in the ingress direction.
One monitor per interface is supported, although multiple exporters per interface are supported.
Only permanent and normal cache is supported for the monitor; immediate cache is not supported.
Changing any monitor parameter will not be supported when it is applied on any of the interfaces
or VLANs.
When both the port and VLANs have monitors attached, then VLAN monitor will overwrite the
port monitor for traffic coming on the port.
Flow monitor type and traffic type (type means IPv4, IPv6, and data link) should be same for the
flows to be created.
You cannot attach an IP and port-based monitor to an interface at the same time on the switch. A
48-port switch supports a maximum of 48 monitors (IP or port-based) and for 256 SVIs, you can
configure up to 256 monitors (IP or port-based).
When running the show flow monitor flow_name cache command, the switch displays cache
information from an earlier switch software version (Catalyst 2960-S) with all fields entered as
zero. Ignore these fields, as they are inapplicable to the switch.
Sampler restrictions:
Only sampled NetFlow is supported.
For both port and VLANS, a total of only 4 samplers (random or deterministic) are supported on
the switch.
The sampling minimum rate for both modes is 1 out of 32 flows, and the sampling maximum rate
for both modes is 1 out of 1022 flows.
You must associate a sampler with a monitor while attaching it to an interface. Otherwise, the
command will be rejected. Use the ip flow monitor monitor_name sampler sampler_name input
interface configuration command to perform this task.
Consolidated Platform Configuration Guide, Cisco IOS Release 15.2(4)E (Catalyst 2960-X Switches)
510
Restrictions for NetFlow Lite

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Cisco Catalyst 2960 Series Specifications

General IconGeneral
LayerLayer 2
Power over Ethernet (PoE)Available on some models
RAM128 MB
Flash Memory32 MB
MAC Address Table Size8000
Operating Temperature0°C to 45°C (32 to 113°F)
Ports24 or 48 x 10/100/1000

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