Vyatta NOS documentation

Learn how to install, configure, and operate Vyatta Network Operating System (Vyatta NOS), which helps to drive our virtual networking and physical platforms portfolio.

Configuration requirements and limits

The vRouter has the following configuration requirements and limits for SPAN, RSPAN, and ERSPAN.

  • A total of eight monitoring sessions is supported.

  • By default, a port monitoring session is enabled. When a source interface is configured, packets from the interface are mirrored only when the session type and the destination interface for the session are also configured. For ERSPAN, the indentifier (ID) and header also must be specified.

  • When a session is configured for port monitoring, the type value must be specified. The value is mandatory.

  • The SPAN type supports the following interfaces:

    • Source interface, physical or VLAN

    • Destination interface, physical only

  • The RSPAN-source type supports the following interfaces:

    • Source interface, physical or VLAN

    • Destination interface, VLAN only

  • The RSPAN-destination type supports the following interfaces:

    • Source interface, VLAN only

    • Destination interface, physical only

  • The ERSPAN-source type supports the following interfaces:

    • Source interface, physical or VLAN

    • Destination interface, ERSPAN tunnel only

  • The ERSPAN-destination type supports the following interfaces:

    • Source interface, ERSPAN tunnel only

    • Destination interface, physical only

  • A source interface and a destination interface cannot be same.

  • A total of eight distinct source interfaces is allowed for all sessions.

  • The default directions for monitoring on a source interface are both receive (RX) and transmit (TX). The direction can also be configured as RX only or TX only.

  • Source interfaces cannot be shared between sessions.

  • The source VIF for the RSPAN-destination type must be part of a bridge group.

  • A destination interface that is configured for monitoring transmits mirrored packets only. Do not use this interface for other traffic.

  • The destination interface must be configured in the system, cannot be disabled, and cannot have address, IPv4, and IPv6 attributes.

  • A physical destination interface cannot have QoS configured on it.

  • Only one destination interface for each session is allowed and cannot be shared between different sessions.

  • The destination interface for any session cannot be part of a bridge group.

  • An RSPAN-destination or ERSPAN-destination type can have only one source interface for a port monitoring session.

  • The source interface of an RSPAN-destination or ERSPAN-destination type cannot have its direction set.

  • For port monitoring sessions, you are not allowed to configure a physical interface and VIF from the same physical interface together. For example, both dp0s7 and dp0s7.700 are not allowed.

  • You cannot change the type of the session after you commit the configuration.

  • You cannot change the ERSPAN identifier and header properties of an ERSPAN-source or ERSPAN-destination session type after you commit the configuration.