Onboard Failure Logging; Span; Erspan; Lldp - Cisco Nexus 7000 Series Configuration Manual

Onboard Failure Logging

Onboard Failure Logging
You can configure a device to log failure data to persistent storage, which you can retrieve and display for
analysis at a later time. This on-board failure logging (OBFL) feature stores failure and environmental
information in nonvolatile memory on the module. This information is useful for analysis of failed modules.

SPAN

You can configure an Ethernet Switched Port Analyzer (SPAN) to monitor traffic in and out of your device.
The SPAN features allow you to duplicate packets from source ports to destination ports.

ERSPAN

Encapsulated remote switched port analyzer (ERSPAN) is used to transport mirrored traffic in an IP network.
ERSPAN supports source ports, source VLANs, and destinations on different switches, which provide remote
monitoring of multiple switches across your network. ERSPAN uses a generic routing encapsulation (GRE)
tunnel to carry traffic between switches.
ERSPAN consists of an ERSPAN source session, routable ERSPAN GRE-encapsulated traffic, and an ERSPAN
destination session. You separately configure ERSPAN source sessions and destination sessions on different
switches.
To configure an ERSPAN source session on one switch, you associate a set of source ports or VLANs with
a destination IP address, ERSPAN ID number, and virtual routing and forwarding (VRF) name. To configure
an ERSPAN destination session on another switch, you associate the destinations with the source IP address,
the ERSPAN ID number, and a VRF name. The ERSPAN source session copies traffic from the source ports
or source VLANs and forwards the traffic using routable GRE-encapsulated packets to the ERSPAN destination
session. The ERSPAN destination session switches the traffic to the destinations.

LLDP

Link Layer Discovery Protocol (LLDP) is a vendor-neutral, one-way device discovery protocol that allows
network devices to advertise information about themselves to other devices on the network. This protocol
runs over the data-link layer, which allows two systems running different network layer protocols to learn
about each other. You can enable LLDP globally or per interface.

NetFlow

NetFlow identifies packet flows for both ingress and egress IP packets and provide statistics based on these
packet flows. NetFlow does not require any change to either the packets themselves or to any networking
device.
Cisco Nexus 7000 Series NX-OS System Management Configuration Guide
16
Overview