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...
Category: ENTERPRISE
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...
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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,...
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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
ENTERPRISE, JNCIE, JNCIP, SERVICE PROVIDER
OSPF vs. ISIS
Long ago, when I didn't know much about ISIS, and I mostly worked with customers running OSPF, I used to think of ISIS as a strange routing protocol, that nobody really cared much about. But I was sooo wrong! I...
ENTERPRISE, JNCIE, JNCIP, SECURITY, SERVICE PROVIDER
JUNOS RIB-GROUPS (1/2)
During the JNCIE-SP preparation session we had a few weeks ago, I mentioned that if someone had any suggestions about topics for my blog, I would be happy to consider them. Someone answered: rib-groups! And I thought: "oh yeah, that’s...
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