Configuring The Multicast Best Effort Mode For An Erspan Session - Cisco Nexus 7000 Series Configuration Manual

Configuring the Multicast Best Effort Mode for an ERSPAN Session

Procedure
Step 1
Step 2
Step 3
Step 4
Step 5
Step 6
Step 7
Step 8
Configuring the Multicast Best Effort Mode for an ERSPAN Session
You can configure the multicast best effort mode for any ERSPAN session. By default, ERSPAN replication
occurs on both the ingress and egress modules. When you enable the multicast best effort mode, ERSPAN
replication occurs only on the ingress module for multicast traffic or on the egress module for packets that
egress out of Layer 3 interfaces (that is, on the egress module, packets that egress out of Layer 2 interfaces
are not replicated for ERSPAN).
For Layer 3 multicast traffic, ERSPAN replication occurs on the egress module. If traffic is multicasted
Note
to multiple egress modules, you could capture multiple ERSPAN copies for each packet (that is, one copy
from each egress module).
Cisco Nexus 7000 Series NX-OS System Management Configuration Guide
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Command or Action
switch# configure terminal
switch(config)# monitor session
session-number type erspan-source
switch(config-erspan-src)#
header-type version
switch(config-erspan-src)# [no]
sampling range
switch(config-erspan-src)# exit
switch(config)# exit
switch# show monitor session
session-number
switch# copy running-config
startup-config [vdc-all]
Purpose
Enters global configuration mode.
Enters the monitor configuration mode for the ERSPAN
source type and specifies the ERSPAN session for which
ERSPAN sampling is to be configured.
(Optional)
Changes the ERSPAN source session from Type II to
Type III.
Configures the sampling range for ERSPAN source
packets. The sampling value is the range in which one
packet out of x packets will be spanned, where x is from
2 to 1023. In this example, 1 out of every 100 packets
will be spanned.
Exits monitor configuration mode.
Exits global configuration mode.
(Optional)
Displays the status of ERSPAN sessions, including the
configuration status of ERSPAN sampling, the sampling
value, and the modules on which sampling is and is not
supported.
(Optional)
Copies the running configuration to the startup
configuration.
Configuring ERSPAN