Cisco Systems C2960XSTACK Default SPAN and RSPAN Configuration, Configuration Guidelines, Feature

Configuring SPAN and RSPAN

Default SPAN and RSPAN Configuration

added to the hardware memory on the switch. A system message notifies you of this action, which is called reloading. The IPv4, IPv6 and MAC FSPAN ACLs can be unloaded or reloaded independently.

If a VLAN-based FSPAN session configured on a stack cannot fit in the hardware memory on one or more switches, it is treated as unloaded on those switches, and traffic meant for the FSPAN ACL and sourcing on that switch is not copied to the SPAN destination ports. The FSPAN ACL continues to be correctly applied, and traffic is copied to the SPAN destination ports on the switches where the FSPAN ACL fits in the hardware memory.

When an empty FSPAN ACL is attached, some hardware functions copy all traffic to the SPAN destination ports for that ACL. If sufficient hardware resources are not available, even an empty FSPAN ACL can be unloaded.

IPv4 and MAC FSPAN ACLs are supported on all feature sets. IPv6 FSPAN ACLs are supported only in the advanced IP Services feature set.

Default SPAN and RSPAN Configuration

Table 12: Default SPAN and RSPAN Configuration

Feature

SPAN state (SPAN and RSPAN)

Source port traffic to monitor

Encapsulation type (destination port)

Ingress forwarding (destination port)

VLAN filtering

Default Setting

Disabled.

Both received and sent traffic (both).

Native form (untagged packets).

Disabled.

On a trunk interface used as a source port, all VLANs are monitored.

RSPAN VLANs None configured.

Configuration Guidelines

SPAN Configuration Guidelines

•To remove a source or destination port or VLAN from the SPAN session, use the no monitor session session_number source {interface interface-id vlan vlan-id} global configuration command or the no monitor session session_number destination interface interface-idglobal configuration command.

For destination interfaces, the encapsulation options are ignored with the no form of the command.

•To monitor all VLANs on the trunk port, use the no monitor session session_number filter global configuration command.

Catalyst 2960-X Switch Network Management Configuration Guide, Cisco IOS Release 15.0(2)EX

OL-29044-01 77