Once you got the email from the vendor saying something like “Your certification is about to expire”, the only thing which come to my mind is “Dam it! Again…..” So long story short, the exam is 120 minutes, 65 questions and the same blueprint from last time. The only change i noticed was the Junos … Read more
“BGP Free Core” is a typical topology in MPLS Service Provider Networks where you run IGP+Label. This allows traffic to transit over devices which don’t know traffic final destination, instead they look only for labels, bring more performance at the end. MPLS allow applications such as L2VPN, L3VPN and much more. Normal Forwarding In normal … Read more
Hoje realizei o exame JN0-643 da Juniper, este exame não é abrangido pelo “Fast track Program” :(. Depois de realizar as formações Advanced Junos Enterprise Routing (AJER) e Advanced Junos Enterprise Switching (AJEX) foi rever as notas e praticar mais a componente de Multicast e QoS. Pré-Requisitos É necessário ter a certificação JNCIA-Junos e JNCIS-ENT … Read more
Nota: Este Post faz parte do guide de Routing. Monitoring Commands show ospf route show ospf database show ospf statistics show ospf log user@R2> show ospf interface extensive Interface State Area DR ID BDR ID Nbrs ge-0/0/3.0 DR 0.0.0.1 192.168.1.2 192.168.1.1 1 Type: LAN, Address: 172.26.1.2, Mask: 255.255.255.252, MTU: 1500, Cost: 1 DR addr: 172.26.1.2, … Read more
Esta feature do BGP permite ao router controlar através de um prefix-list quais os prefixos que o BGP peer deve enviar, permitindo assim reduzir o numero de prefixos processados. Sintaxe: router bgp autonomous-system-number neighbor ip-address capability orf prefix-list [send | receive | both] neighbor {ip-address| peer-group-name} prefix-list prefix-list-name {in | out} Notas: Apenas … Read more
O regex e essencialmente um parser, mas aplicado ao BGP torna-se um utilitário muito útil no parsing de rotas aprendidas pelo router. Existem alguns servidores públicos de rotas onde e possível testar o regex no BGP (consultar lista abaixo). Exemplos: !Rotas originadas no AS 21740 ns-route-server> sh ip bg reg _21740$ BGP table version is … Read more