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...
Category: SERVICE PROVIDER
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
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...
JNCIE, JNCIP, SERVICE PROVIDER
JUNOS RIB-GROUPS (2/2)
Glad you came back for more rib-groups fun! We are now going to take a look at some applications of rib-groups that you might find interesting and applicable to your real networks. Warning: Brace for some extra topics! CASE 1...
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...
JNCIE, JNCIP, SERVICE PROVIDER
BGP ADD-PATH
The Add Path feature is described in RFC7911 - Advertisement of Multiple Paths in BGP, which defines a new BGP extension that allows a router (e.g. A route reflector) to advertise multiple paths (routes) for the same prefix. This extension...
JNCIE, JNCIP, SERVICE PROVIDER
RSVP reservation styles.
To create a dynamic LSP (Label Switched Path) using RSVP (Resource Reservation Protocols) in JunOS, you define a name that uniquely identifies the LSP and, at minimum, you specify the address of the egress router. EXAMPLE: set label-switched-path R1=>R4 to...
JNCIE, JNCIP, SERVICE PROVIDER
MPLS vs. VXLAN encapsulation
At a high level: MPLS was designed to speed up processing of packets. Forwarding is based on the label in the MPLS header. In Juniper, the label information is kept in the mpls.0 table. Labels are advertised using either RSVP...
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