JNCIP-SP case studies
JNCIP-SP · Put your knowledge to work in context.
JNCIP-SP is the Professional-level written certification in Juniper's Service Provider Routing and Switching track, sitting above JNCIS-SP and below the hands-on JNCIE-SP lab. Juniper describes its certification program as "a multi-tiered program of written and hands-on lab exams," and the Service Provider track is published as JNCIA-Junos → JNCIS-SP → JNCIP-SP → JNCIE-SP. The JNCIP-SP case studies are 5 cases and about 3,703 words.
1LDP Session Stuck in Connecting After an IS-IS Level Change
PE-1 (lo0 10.255.0.1) and PE-2 (lo0 10.255.0.2) are directly connected over ge-0/0/0/0.0 in 10.0.12.0/30 and both run IS-IS plus LDP. During a maintenance window an engineer set the IS-IS level on PE-2's core-facing interface to level 1 only; PE-1's interface is still level 2 only.
752 words, about 4 min2VPN Prefix Installed in the Wrong Customer VRF
PE-3 and PE-4 are PEs in AS 65000 peering iBGP with a route reflector. PE-3 hosts VRF CUST-A, whose CE advertises 172.16.8.0/24; the VRF is built with vrf-target target:65000:100 .
721 words, about 4 min3RSVP-TE LSP Down: Admin Group Versus Bandwidth
PE-1 needs an RSVP-TE LSP to PE-2 to carry a 500 Mbps VoIP trunk. The LSP is configured with bandwidth 500m and admin-group include-any gold .
631 words, about 3 min4Traffic Shifts to the Backup Transit After a Policy Change
AS 65001 is dual-homed: ISP-A (AS 65100) on a 10 Gbps circuit at 192.0.2.1/30 and ISP-B (AS 65200) on a 1 Gbps metered circuit at 198.51.100.1/30. Both send full tables and the design intent is that all traffic, inbound and outbound, uses ISP-A; ISP-B is standby.
792 words, about 4 min5Voice Quality Collapse Because Video Is Being Classified as EF
An MX PE sells a 10 Gbps IP transit port on ge-0/0/1 to an enterprise. CoS is a single-level design: a DSCP classifier maps EF (46) to forwarding class ef , AF41 to af41 , and everything else to be ; the ef scheduler is strict-high with a transmit-rate ceiling of 500 Mbps, af41 gets 2 Gbps, and be takes the remainder.
807 words, about 4 min