Cisco Catalyst 3550 Command Reference Manual page 206

monitor session
,
-
both, rx, tx
source remote vlan
vlan-id
source vlan vlan-id rx
all, local, remote
Defaults
On a source interface, the default is to monitor both received and transmitted traffic. On source VLANs,
you can monitor only received traffic.
All VLANs are monitored on a trunk interface that is used as a source port.
If encapsulation type is not specified on a destination port, packets are sent in native form with no
encapsulation.
Ingress forwarding is disabled on destination ports.
Command Modes Global configuration
Command History Release
12.1(6)EA1
12.1(11)EA1
12.1(12c)EA1
Usage Guidelines
Traffic that enters or leaves source ports or enters source VLANs can be monitored by using SPAN or
RSPAN. Traffic routed to source ports or source VLANs cannot be monitored.
You can set a maximum of two SPAN or RSPAN sessions. You can divide the two sessions between
SPAN, RSPAN source, and RSPAN destination sessions. Each session can have only one destination port
and only one transmitting source port. You can, however, have multiple receiving source ports and
VLANs.
Catalyst 3550 Multilayer Switch Command Reference
2-180
(Optional) Specify a series of interfaces or VLANs, or separate a range of
interfaces or VLANs from a previous range. Enter a space after the comma.
For source interface, you can configure the first port to monitor
Note
egress traffic; other ports will be ingress only if a range or list is
specified.
(Optional) Specify a range of interfaces or VLANs. Enter a space before
and after the hyphen.
For source interface, you can configure the first port to monitor
Note
egress traffic; other ports will be ingress only if a range or list is
specified.
(Optional) Specify the traffic direction to monitor. If you do not specify a
traffic direction, the source interface sends both transmitted and received
traffic. Transmitted (tx) traffic can be monitored on only one source port.
Specify the source RSPAN VLAN for an RSPAN destination session.
Specify the SPAN or RSPAN source interface as a VLAN ID. The vlan-id
range is 1 to 4094.
VLANs cannot be egress monitored. Direction (rx) must be specified.
Specify all, local, or remote to clear a SPAN or RSPAN session.
Modification
This command was first introduced.
These RSPAN keywords were added: destination remote vlan
reflector-port, source remote vlan, all, local, remote.
The ingress vlan keyword was added.
Chapter 2 Cisco IOS Commands
78-11195-09