RSPAN
•
RSPAN VLAN/BD is
not
used for data traffic.
•
The maximum number of supported RSPAN sessions are 14.
•
Only one source port is supported per RSPAN.
•
Only port channel RSPAN is supported.
•
Per member link RSPAN is not supported.
•
Source ranges (VLAN range or port range) is
not
supported.
•
VLAN filtering is not supported.
•
If two RSPAN configurations sessions are configured on two RSPAN BDs associated to the same Trunk
EFP, the traffic from the first session flows to the second session after it is configured.
•
RSPAN destination configuration for Layer2 pseudowire is
not
supported.
•
If RSPAN BD is associated with a VPLS pseudowire, the traffic flows through the VPLS pseudowire.
•
Do not have RSPAN bridge domain as part of RSPAN source interface.
Incomplete configuration of RSPAN / LSPAN will result in traffic drop issues.
Note
Understanding Local SPAN and RSPAN
Information About Local SPAN Session and RSPAN Session
Local SPAN Session
A local Switched Port Analyzer (SPAN) session is an association of a destination interface with a set of source
interfaces. You can configure local SPAN sessions to monitor all traffic in a specified direction. Local SPAN
sessions allow you to monitor traffic on one or more interfaces and to send either ingress traffic, egress traffic,
or both to one destination interface.
Local SPAN sessions do not interfere with the normal operation of the switch. You can enable or disable
SPAN sessions with command-line interface (CLI) commands. When enabled, a local SPAN session might
become active or inactive based on various events or actions, and this would be indicated by a syslog message.
The
show monitor session span session number
command displays the operational status of a SPAN session.
A local SPAN session remains inactive after system power-up until the destination interface is operational.
The following configuration guidelines apply when configuring local SPAN on the router:
•
When enabled, local SPAN uses any previously entered configuration.
•
Use the
no monitor session session number
command with no other parameters to clear the local SPAN
session number.
Carrier Ethernet Configuration Guide (Cisco ASR 920 Series)
383
Configuring Switched Port Analyzer
Understanding Local SPAN and RSPAN
Содержание ASR 920 series
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