I was asked early this week what the difference between configuring a routing policy matching on "traffic-engineering" and configuring one matching on "family traffic-engineering" is. I found this to be a very good question, so I decided to write a...
Category: JNCIP
JNCIE, JNCIP, JNCIS, ROUTING PROTOCOLS, SERVICE PROVIDER
SRX210 network configuration example
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...
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...
CISCO SPCOR, JNCIP, SERVICE PROVIDER
Effect of Route Summarization and LDP updates
While studying for SPCORE I learned about this behavior: And I tested this in Junos using routing instances and lt interfaces: ylara@R1# show | display set relative set R1 instance-type virtual-router set R1 interface lt-0/0/0.1 set R1 interface lo0.1 set...
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...
JNCIE, JNCIP, SERVICE PROVIDER
ISIS NARROW and WIDE METRICs
Today we will talk about ISIS narrow metrics and wide metrics, but as always, let me give you some background first. We start by looking at the ISIS PDUs (Packet Data Units), which is the term used to refer to...
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, 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...
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