Cisco Systems WSC2960X48TSL, WSC2960X24TDL manual Restrictions for SPAN and RSPAN, Rspan, Span

Configuring SPAN and RSPAN

Restrictions for SPAN and RSPAN

RSPAN

•We recommend that you configure an RSPAN VLAN before you configure an RSPAN source or a destination session.

Restrictions for SPAN and RSPAN

SPAN

The restrictions for SPAN are as follows:

•On each switch, you can configure a maximum of 4 (2 if switch is stacked with Catalyst 2960-S switches) source sessions and 64 RSPAN destination sessions. A source session is either a local SPAN session or an RSPAN source session.

•For SPAN sources, you can monitor traffic for a single port or VLAN or a series or range of ports or VLANs for each session. You cannot mix source ports and source VLANs within a single SPAN session.

•The destination port cannot be a source port; a source port cannot be a destination port.

•You cannot have two SPAN sessions using the same destination port.

•When you configure a switch port as a SPAN destination port, it is no longer a normal switch port; only monitored traffic passes through the SPAN destination port.

•Entering SPAN configuration commands does not remove previously configured SPAN parameters. You must enter the no monitor session {session_number all local remote} global configuration command to delete configured SPAN parameters.

•For local SPAN, outgoing packets through the SPAN destination port carry the original encapsulation headers—untagged, ISL, or IEEE 802.1Q—if the encapsulation replicate keywords are specified. If the keywords are not specified, the packets are sent in native form.

•You can configure a disabled port to be a source or destination port, but the SPAN function does not start until the destination port and at least one source port or source VLAN are enabled.

•You cannot mix source VLANs and filter VLANs within a single SPAN session.

Traffic monitoring in a SPAN session has the following restrictions:

•Sources can be ports or VLANs, but you cannot mix source ports and source VLANs in the same session.

•The switch supports up to four local SPAN or RSPAN source sessions. However if this switch is stacked with Catalyst 2960-S switches, you are limited to 2 local SPAN or RSPAN source sessions.

◦You can run both a local SPAN and an RSPAN source session in the same switch or switch stack. The switch or switch stack supports a total of 64 source and RSPAN destination sessions.

◦You can configure two separate SPAN or RSPAN source sessions with separate or overlapping sets of SPAN source ports and VLANs. Both switched and routed ports can be configured as SPAN sources and destinations.

•You can have multiple destination ports in a SPAN session, but no more than 64 destination ports per switch stack.

	Catalyst 2960-X Switch Network Management Configuration Guide, Cisco IOS Release 15.0(2)EX
66	OL-29044-01