High Availability; Licensing Requirements For Erspan; Prerequisites For Erspan; Guidelines And Limitations For Erspan - Cisco Nexus 9000 Series Configuration Manual

Configuring ERSPAN

High Availability

The ERSPAN feature supports stateless and stateful restarts. After a reboot or supervisor switchover, the
running configuration is applied.
For more information on high availability, see the Cisco Nexus 9000 Series NX-OS High Availability and
Redundancy Guide.

Licensing Requirements for ERSPAN

The following table shows the licensing requirements for this feature:
Product
Cisco
NX-OS

Prerequisites for ERSPAN

ERSPAN has the following prerequisites:
• You must first configure the ports on each device to support the desired ERSPAN configuration. For

Guidelines and Limitations for ERSPAN

ERSPAN has the following configuration guidelines and limitations:
• For ERSPAN session limits, see the Cisco Nexus 9000 Series NX-OS Verified Scalability Guide.
• The number of ERSPAN sessions per line card reduces to two if the same interface is configured as a
• A single forwarding engine instance supports four ERSPAN sessions. For Cisco Nexus 9300 Series
• Only ERSPAN source sessions are supported. Destination sessions are not supported.
• Cisco Nexus 9300 Series switches do not support Tx ERSPAN on 40G uplink ports.
• An ERSPAN copy of Cisco Nexus 9300 Series switch 40G uplink interfaces will miss the dot1q
• A VLAN can be part of only one session when it is used as an ERSPAN source or filter.
License Requirement
ERSPAN requires no license. Any feature not included in a license package is bundled with
the nx-os image and is provided at no extra charge to you. For a complete explanation of the
Cisco NX-OS licensing scheme, see the Cisco NX-OS Licensing Guide.
more information, see the Cisco Nexus 9000 Series NX-OS Interfaces Configuration Guide.
bidirectional source in more than one session.
switches, if the first three sessions have bidirectional sources, the fourth session has hardware resources
only for Rx sources. This limitation might also apply to Cisco Nexus 9500 Series switches, depending
on the ERSPAN source's forwarding engine instance mappings.
information when spanned in the Rx direction.
Cisco Nexus 9000 Series NX-OS System Management Configuration Guide, Release 6.x
High Availability
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