Planet Networking & Communication SGS-5240 Series User Manual page 75

◆RSPAN Limitations
The following limitations apply to the use of RSPAN on this switch:

RSPAN Ports – Only ports can be configured as an RSPAN source, destination, or uplink; static and dynamic trunks
are not allowed. A port can only be configured as one type of RSPAN interface –source, destination, or uplink. Also,
note that the source port and destination port cannot be configured on the same switch.

Local/Remote Mirror – The destination of a local mirror session (created on the Interface > Port > Mirror page) cannot
be used as the destination for RSPAN traffic.

Spanning Tree – If the spanning tree is disabled, BPDUs will not be flooded onto the RSPAN VLAN.

MAC address learning is not supported on RSPAN uplink ports when RSPAN is enabled on the switch. Therefore, even
if spanning tree is enabled after RSPAN has been configured, MAC address learning will still not be re-started on the
RSPAN uplink ports.

IEEE 802.1X – RSPAN and 802.1X are mutually exclusive functions.

When 802.1X is enabled globally, RSPAN uplink ports cannot be configured, even though RSPAN source and
destination ports can still be configured. When RSPAN uplink ports are enabled on the switch, 802.1X cannot be
enabled globally.

Port Security – If port security is enabled on any port, that port cannot be set as an RSPAN uplink port, even though it
can still be configured as an RSPAN source or destination port. Also, when a port is configured as an RSPAN uplink
◆Session – A number identifying this RSPAN session. (Range: 1)
port, port security cannot be enabled on that port.
Only one mirror session is allowed, including both local and remote mirroring. If local mirroring is enabled, then no session can
be configured for RSPAN.
 Operation Status – Indicates whether or not RSPAN is currently functioning.
 Switch Role – Specifies the role this switch performs in mirroring traffic.

None – This switch will not participate in RSPAN.

Source - Specifies this device as the source of remotely mirrored traffic.

Intermediate - Specifies this device as an intermediate switch, transparently passing mirrored traffic from one or
more sources to one or more destinations.

Destination - Specifies this device as a switch configured with a destination port which is to receive mirrored traffic
for this session.
 Remote VLAN – The VLAN to which traffic mirrored from the source port will be flooded. The VLAN specified in this field
must first be reserved for the RSPAN application using the Switch Management >VLAN > Static Vlan page.
 Uplink Port – A port on any switch participating in RSPAN through which mirrored traffic is passed on to or received from
the RSPANVLAN.
Only one uplink port can be configured on a source switch, but there is no limitation on the number of uplink ports
configured on an intermediate or destination switch.
Only destination and uplink ports will be assigned by the switch as members of the RSPAN VLAN. Ports cannot be
manually assigned to an RSPAN VLAN through the Switch Management >VLAN > Static Vlan page. Nor can GVRP
dynamically add port members to an RSPAN VLAN. Also, note that the Switch Management >VLAN > Static Vlan page
will not display any members for an RSPANVLAN, but will only show configured RSPAN VLAN identifiers.
 Type – Specifies the traffic type to be mirrored remotely. (Options: Rx,Tx, Both)
 Destination Port – Specifies the destination port to monitor the traffic mirrored from the source ports. Only one
destination port can be configured on the same switch per session, but a destination port can be configured on more than
one switch for the same session. Also note that a destination port can still send and receive switched traffic, and
participate in any Layer 2 protocols to which it has been assigned.
 Tag – Specifies whether or not the traffic exiting the destination port tithe monitoring device carries the RSPAN VLAN tag.
User's Manual of SGS-5240 Series Managed Switch
75