SPAN


Encapsulated Remote Switched Port Analyzer or ERSPAN is a type of [SPAN](/span) performed by  Cisco switches that allows you to copy all traffic from a single or multiple source ports or source [VLAN](/vlan)s to a destination interface on a different subnet.  ERSPAN allows captured packets to be routed to reach their destination interface to be captured.

ERSPAN uses [GRE](/gre) encapsulation of the captured packets to achieve this.


Links:

https://networklessons.com/cisco/ccie-routing-switching-written/erspan

ERSPAN

ECMP Multicast Routing Cisco Nexus Switches

EEM - action mail

EEM Cisco Embedded Event Manager

EEM Matching a string within CLI output

EEM sync and skip keywords

EIGRP - Advertised metric is cumulative

EIGRP - Advertising a route using the network command

EIGRP - Hello interval and Hold time

EIGRP - Hop Count

EIGRP - Network command syntax

EIGRP - Queries

EIGRP - Reliable Multicast

EIGRP - Router ID and loop prevention

EIGRP - Source of values for metric calculation

EIGRP - Stub Router

EIGRP - Summarization per interface

EIGRP - Update message exchange process

EIGRP - af-interface configuration mode

EIGRP - how metrics are sent in updates

EIGRP - metric computation method

EIGRP - metric equation

EIGRP - named mode name

EIGRP - network command with no wildcard mask

EIGRP - shutdown command

EIGRP - stub site function

EIGRP Create and advertise a default route

EIGRP Feasibility condition

EIGRP Header

EIGRP IP bandwidth-percent example

EIGRP LFA FRR

EIGRP Refining the behavior of load balancing with traffic-share

EIGRP SIA timers

EIGRP authentication

EIGRP auto-summary

EIGRP change rib scale

EIGRP establishing remote neighbors

EIGRP header - ACK field

EIGRP named mode

EIGRP on the Nexus Platform

EIGRP redistributing named mode

EIGRP rib-scale

EIGRP seed metrics when redistributing

EIGRP split horizon verification

EIGRP split-horizon vs poison reverse

EIGRP unequal cost load balancing

EIGRP what happens when a feasible successor fails

EIGRP

EPC - Cisco Embedded Packet Capture

EVE-NG supported Cisco and other vendor images

Equal-cost Multi-path routing

EtherChannel - Load Balancing on CatOS

EtherChannel - Load balancing algorithm applied globally and per portchannel

EtherChannel - Troubleshooting on Cisco IOS Switches

EtherChannel - applying configurations to the interface

EtherChannel - implementing over 802.1Q tunneling

EtherChannel - load balancing algorithms

EtherChannel - max-bundle

EtherChannel - prerequisites for bundling

EtherChannel

Etherchannel - fast-switchover

Ethernet - Pause Frames

Ethernet - role of FCS field

Ethernet - speed and duplex mismatches

Ethernet - speed and duplex settings on an ISR4431

Ethernet CSMA-CD

Ethernet VPN (EVPN)

Ethernet administrative and operational encapsulation

Ethernet administrative operational mode

Ethernet frame types

Ethernet header

Ethernet over IP (EoIP)

Ethernet

FHRP - HSRP Resign Message

FHRP - interaction with routing protocols

FHRP - which ports should you configure

FHRP Communication Between Redundant Routers

FHRP Load Balancing Behavior

FHRP Protocols

FHRP communication path of keepalives

Fiber optic types

Fiber optics - Multi mode fiber optics characteristics

Fiber optics - Single mode fiber optics characteristics

Fiber optics - color coding

Fiber optics - connectors

FlexVPN Hub and Spoke backup routes

FlexVPN redundant hub with dual cloud

FlexVPN spoke to spoke communication fails with IPSec tunnel

FlexVPN

Frame Relay - is it a relevant technology anymore

Frame-Relay - emulating a Frame-Relay switch

Frame-Relay DLCI values

GNS3 how to obtain Cisco IOS images

GRE - Recursive routing error - AD solution

GRE - Recursive routing error - filtering solution

GRE - Recursive routing error

GRE - Tunnel Addressing

GRE MTU settings

ERSPAN

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