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...
Category: JNCIP
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...
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...
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...
JNCIE, JNCIP, SERVICE PROVIDER
LDP vs. RSVP
RSVP - Resource Reservation Protocol LDP - Label Distribution Protocol Standard?RFC3209RFC 5036What configuration steps are required?You need to enable RSVP and MPLS on the interfaces, create the LSP(s) under protocols MPLS, and depending on LSP configuration an IGP might also...
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