I want to show how to quickly and reliably troubleshoot a network using
notepad++.If you are not using Cisco GENIE and your network is not very
big and you have several routers/switches only.For illustration, I
created a simple topology.First, the loopbac...
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BGP AS Path Prepending AS Path is the fourth BGP attribute, AS Path is
well known, mandatory attribute. BGP prefer the shortest AS path to get
to destination. In other words path with shortest AS path list is more
desirable. You can manipulate this by usi...
BGP Route filter BGP updates can be controlled by using a numbers of
different filtering methods. BGP updates can be filtered based on routes
information, on paths information or on communities. All the methods
will achieve the same results choosing one o...
IP RoutingIP routing is basically the process of moving packets from one
network to another network using routers.Routing protocolsRouter use
routing protocol to dynamically find all the networks within the great
internetwork and to ensure that all router...
Route Redistribution configuration we have already learned what is route
redistribution and why we need, if you don't then click here . In this
section we see configuration. R1#show ip interface briefInterface
IP-Address OK? Method Status ProtocolFastEthe...
Distribution listsA distribution-list is used to control routing update
either coming to your router or leaving from the router.
Distribution-lists work on a variety of different IOS routing protocols
like EIGRP, RIP, and OSPF. Distribution-list is one of...
Policy Based Routing (PBR) Policy based routing is use to path
manipulation. It is used for implementing policy that causes the packet
to take a different direction. Policy based routing allows source based
routing. Routing table is destination base. In s...
BGP community Local-AS Local-AS is a well known BGP community and its
use in confederations scenarios to prevent the transmit of traffic
outside the local-as. If you are not sure about what is BGP communities
are and how its work then I advises you to rea...
BGP Communities_No-advertise configuration BGP Communities The community
attribute is a transitive optional attribute. Communities can be used to
mark a set of prefixes that share a common property. Any BGP router can
tag routes in incoming and outgoing r...
BGP route reflector (RR) configuration of two RR servers We have already
learned what route reflector is and why we use route reflector. In this
section we will see the configuration of two RR servers and will learn
about deep RR behavior. A route reflect...
BGP Route Reflectors (RR) Route reflectors (RR) are one of the methods
to get rid of the full-mesh of IBGP peers in your network. The route
reflector allows all IBGP speakers within your autonomous system to
learn about the available routes without creati...
BGP Multi Exit Discriminator (MED) Multi Exit Discriminator (MED) also
called metric. MED is optional and non transitive attribute, MED allows
an autonomous system to tell a neighboring autonomous system the best
way to forward packets into the first auto...
BGP Local Preference (Local_Pref) BGP Local preference (Local_Pref) Path
attribute gives the router inside a single autonomous system a value
that they can set per-route and advertise to all iBGP routers inside the
autonomous system, so that all routers i...
BGP Weight Attribute A Cisco router can use the BGP weight, in that
router to influence that one router’s choice of outbound route. To do
so, when a router receives a BGP update, that router can set the weight
either selectively, per route, using route ma...
Hi, Requirement is to send all CLI activity to a remote syslog server/s, the following configuration sends the syslog message to the local device only, useful but i need the messages sent to remote servers, any help would be appreciated. event m...
I am currently working on my CCNA and have had much trouble finding labs that dive deep into many of the subjects that I’m having trouble understanding as well as building upon that knowledge and taking things to the next level. So, I have decided t...
Hi all,recently we installed a new catalyst 9500 switches.we configured call home connecting to cisco smart account (Cloud). we activated the license (network advantage) and checked the activation (at the switch and the cloud dashboard). after a...
Just like to share something I came across for the first time tonight-
Simple task – password recovery 2960x -48LPS, (universalk9-mz.150-2.EX5)The situation was this switch was acting as a transit hop for some remote customer, It had a faulty fan so...