Span And Rspan Session Limits; Default Span And Rspan Configuration; Configuring Span; Span Configuration Guidelines - Cisco Catalyst 2950 Software Configuration Manual

Chapter 24 Configuring SPAN and RSPAN

SPAN and RSPAN Session Limits

You can configure (and store in NVRAM) one local SPAN session or multiple RSPAN sessions on a
switch. The number of active sessions and combinations are subject to these restrictions:
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Default SPAN and RSPAN Configuration

Table 24-1
Table 24-1
Feature
SPAN state
Source port traffic to monitor
Encapsulation type (destination port)
Ingress forwarding (destination port)

Configuring SPAN

This section describes how to configure SPAN on your switch. It contains this configuration information:
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SPAN Configuration Guidelines

Follow these guidelines when configuring SPAN:
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SPAN or RSPAN source (rx, tx, both): 1 active session limit. (SPAN and RSPAN are mutually
exclusive on a source switch).
RSPAN source sessions have one destination per session with an RSPAN VLAN associated for that
session.
Each RSPAN destination session has one or more destination interfaces for each RSPAN VLAN that
they support.
RSPAN destination sessions are limited to two, or one if a local SPAN or a source RSPAN session
is configured on the same switch.
shows the default SPAN and RSPAN configuration.
Default SPAN and RSPAN Configuration
SPAN Configuration Guidelines, page 24-7
Creating a SPAN Session and Specifying Ports to Monitor, page 24-8
Creating a SPAN Session and Enabling Ingress Traffic, page 24-9
Removing Ports from a SPAN Session, page 24-11
SPAN sessions can coexist with RSPAN sessions within the limits described in the
RSPAN Session Limits" section on page
The destination port cannot be a source port; a source port cannot be a destination port.
You can have only one destination port per SPAN session. You cannot have two SPAN sessions using
the same destination port.
An EtherChannel port can be a SPAN source port; it cannot be a SPAN destination port.
Default Setting
Disabled.
Both received and sent traffic (both).
Native form (no encapsulation type header).
Disabled.
24-7.
Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide
Configuring SPAN
"SPAN and
24-7