ylara@R1# show | display setset version 12.1X44-D35.5set system host-name R1set system time-zone America/New_Yorkset system root-authentication encrypted-password "$1$6gNz/e.a$3PwYertOAmvSXeWEYVkKF1"set system login user ylara uid 2000set system login user ylara class super-userset system login user ylara authentication encrypted-password "$1$tWTTA9FV$WTL22E4Hj2JKLEmbODI8i0"set system services ssh root-login...
Category: JNCIS
ENTERPRISE, JNCIP, JNCIS, SERVICE PROVIDER
I am back + BGP next hop resolution using an LSP
Hello!!! It's been a long time! Life has been crazy in the last 2 years , and I know that is an understatement, and that every single one of you would agree 100% I for instance changed jobs, caught Covid...
ENTERPRISE, JNCIE, JNCIP, JNCIS, SECURITY, SERVICE PROVIDER
Junos Routing Tables – Part 1
Along the journey of learning Junos, you will run across different routing tables that are used for different purposes. Some tables make sense right away, but others take some digesting. I hope I can answer some questions that you might...
ENTERPRISE, JNCIP, JNCIS
Spanning Tree Protocol Summary
TERMINOLOGY BRIDGE ID: 8 bytes ID that uniquely identifies each switchFor calculations purposes the first 2 bytes are treated as priority, while the next 6 bytes are the switch's MAC address: Priority is configured with: Junos default priority = 32,768Range: 0...
ENTERPRISE, JNCIA, JNCIE, JNCIP, JNCIS, SERVICE PROVIDER
OSPF SUMMARY
OSPF PACKET TYPES HELLO PACKETS Adjacencies formation: An adjacency could fail if there is a mismatch of any of the following parameters: MTU (stuck in exstart) Network address Subnet mask Hello interval and/or dead interval Area typeAuthenticationArea idInterface type (broadcast,...
JNCIP, JNCIS, SERVICE PROVIDER
MPLS=>RSVP=>CSPF
I was asked about the difference between RSVP and CSPF, and I thought: “hmm, that would probably be like comparing a car’s engine with the car’s GPS”. You definitively need the engine to go anywhere, but if you are like...
ENTERPRISE, JNCIA, JNCIS, SECURITY, SERVICE PROVIDER
AGGREGATE, & GENERATED Additional notes.
Got a very good questions from someone who read my article about MANUALLY CONFIGURED ROUTES: "What is the purpose of using discard with a generated route?" I didn't think much about it at first. I mean, traffic coming in that...
ENTERPRISE, JNCIA, JNCIP, JNCIS, SECURITY, SERVICE PROVIDER
Logical Systems and Virtual Routers
LSYS Virtual Routers Scaling Up to 15 10K+ Management Separation Yes No Independent Routing Process (rpd) Yes No Can allocate resources per instance Yes No Support Routing Protocols Yes Yes NSR, NSB supported No Yes License required (in some products)YesNo...
ENTERPRISE, JNCIA, JNCIS, SERVICE PROVIDER
Primary, preferred addreses.
Primary-preferred-address-examples_YL_MAY-2017Download
JNCIA, JNCIE, JNCIP, JNCIS
MANUALLY CONFIGURED ROUTES – STATIC, AGGREGATE, & GENERATED
When you are trying to set up a route manually for a particular purpose, you are faced with these 3 different options in Junos: STATICGENERATED (summary route)AGGREGATE (summary route) And probably you have asked yourself: What are the differences? Which...
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