C
HAPTER
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| Interface Configuration
Port Configuration
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CONFIGURING REMOTE
PORT MIRRORING
Use the Interface > Port > RSPAN page to mirror traffic from remote
switches for analysis at a destination port on the local switch. This feature,
also called Remote Switched Port Analyzer (RSPAN), carries traffic
generated on the specified source ports for each session over a user-
specified VLAN dedicated to that RSPAN session in all participating
switches. Monitored traffic from one or more sources is copied onto the
RSPAN VLAN through IEEE 802.1Q trunk or hybrid ports that carry it to any
RSPAN destination port monitoring the RSPAN VLAN as shown in the figure
below.
Figure 30: Configuring Remote Port Mirroring
CLI REFERENCES
◆ "RSPAN Mirroring Commands" on page 729
COMMAND USAGE
◆ Traffic can be mirrored from one or more source ports to a destination
port on the same switch (local port mirroring as described in
"Configuring Local Port Mirroring" on page 122), or from one or more
source ports on remote switches to a destination port on this switch
(remote port mirroring as described in this section).
◆ Configuration Guidelines
Take the following step to configure an RSPAN session:
1. Use the VLAN Static List (see "Configuring VLAN Groups" on
page 158) to reserve a VLAN for use by RSPAN (marking the
“Remote VLAN” field on this page. (Default VLAN 1 is prohibited.)
2. Set up the source switch on the RSPAN configuration page by
specifying the mirror session, the switch’s role (Source), the RSPAN
VLAN, and the uplink port. Then specify the source port(s), and the
traffic type to monitor (Rx, Tx or Both).
Source Switch
Intermediate SwitchIntermediate Switch
Destination Switch
Source Port Destination PortUplink Port Uplink Port
Uplink Port Uplink Port
Ingress or egress traffic
is mirrored onto the RSPAN
VLAN from here.
Tagged or untagged traffic
from the RSPAN VLAN is
analyzed at this port.
RPSAN VLAN
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