Router Interfaces Need Separate Subnets


[Layer 3](/osi-model) devices such as routers or Layer 3 switches act as the border or the edge of [broadcast domains](https://networklessons.com/switching/broadcast-domain).  Any [broadcasts](/broadcast-traffic) sent by a host within a broadcast domain will not go beyond a Layer 3 device.  [Routing](/routing) is required to communicate between broadcast domains.

Broadcast Domain Borders

BGP RIB failure

BGP Routing Table Entry without Exit Interface

BGP Site of Origin (SoO) Community

BGP Standard Community

BGP Table Origin Code

BGP Update Groups

BGP Update Total Path Attribute Length field

BGP active and passive peers

BGP advertises only the best path by default

BGP advertising a default route

BGP aggregate-address

BGP and route tagging

BGP applying route maps to prefixes

BGP communities

BGP community propagation

BGP community types

BGP configuring authentication on an established BGP session

BGP dmzlink-bw feature

BGP eBGP next hop optimization

BGP hold timer

BGP how MED attribute is compared

BGP influence Outgoing Traffic

BGP installing a BGP-learned route into the routing table

BGP internal vs external

BGP multihop vs disable-connected-check

BGP neighbor activate command

BGP neighbor-group

BGP paths indicated in the show ip bgp command

BGP peer templates

BGP peering redundancy using loopbacks

BGP private AS numbers

BGP regular expressions - use of 4-Byte ASNs

BGP regular expressions - use of backslash for confederations

BGP route dampening penalty half-life

BGP route refresh capability annoucement

BGP soft reconfiguration on Cisco ASA

BGP sub autonomous system

BGP table status codes

BGP traffic engineering

BGP using next-hop-self with a route reflector

BGP weight attribute default value

BGP when to use next-hop-self

BGP which address is used as the next hop

BGP why do we need an IGP for BGP to work

BGP why route dampening is obsolete

Best practice - concerning undebug all

Best practice - prevent connectivity loss of remote device

Bidirectional Forwarding Detection (BFD)

Broadcast MAC address

Broadcast traffic

CBC-MAC

CBWFQ and shaping

CCNP SCOR exam topics

CDP - best practices

CDP versions messages timers

CEF - Operation within a chassis switch

CEF Load Balancing Algorithm

CISCO ASA IKEv2 hub and spoke

CLI Filtering show commands

CPM - Cisco Performance Monitor

CPM - Collect keyword

CPM - match and collect keywords

Career study advice

Carrier-Grade NAT

Certificate Authority Structure

Certification Cisco exam topics blueprint

Certifications - Continuing Education Credits

Cisco ASA Active-Active

Cisco ASA Active-Standby failover preemption

Cisco ASA Active-Standby

Cisco ASA HTTPS server

Cisco ASA radius-common-pw command

Cisco ASA show listening ports

Cisco Anyconnect SSL WebVPN

Cisco CCDE practice lab example

Cisco CCDE technology

Cisco CCDE

Cisco CML 2.8 for Free with 5 Node Limit

Cisco Context-Based Access Control (CBAC)

Cisco Discovery Protocol (CDP)

Cisco Feature Navigator

Cisco IOS Auth Manager

Cisco IOS Firewall feature set

Cisco IOS On Linux (IOL) Containers

Cisco IOS Order of Operation

Cisco IOS XR

Cisco IOS show listening ports

Cisco IOS test aaa command

Cisco IOS

Cisco Identity Services Engine (ISE)

Cisco Network Data Platform (NDP)

Cisco Online Exam Whiteboard Policy

Cisco Online Remote Proctored Exams

Cisco Pagent Router

Cisco QoS HCF shaper and bandwidth inheritance

Cisco Quantum Flow Processor

Cisco SD-Access home lab

Cisco SD-WAN IPSec encapsulation on tunnel interface of vBond

Broadcast Domain Borders

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