Sim 08: PBR, VRF-Lite and BFD¶
Blueprint 1.6, 1.7, 1.8
| Difficulty | Time target | Devices | Faults |
|---|---|---|---|
| Hard | 30 minutes | 4 x IOSv | 3 |
Scenario¶
R1 is a branch edge router that keeps corporate and guest traffic apart with VRF-Lite. VRF CORP and VRF GUEST share one physical link to the hub R2, using 802.1Q subinterfaces, and each VRF runs its own OSPF process. A second, slower corporate path runs from R1 through R3 to R2.
- PBR: voice traffic from the voice subnet 10.4.11.0/24 (behind the LAN router R4) must use the R3 path, which has the voice-friendly carrier. Data traffic follows normal routing, which prefers the direct link.
- BFD: OSPF in VRF CORP on the direct R1 to R2 link must detect a silent failure in under one second, so BFD runs on that subinterface with a 300 ms interval and a multiplier of 3.
- Isolation: guest users must reach only the guest Internet edge on R2 (10.2.200.0/24) and never any corporate prefix.
Download the lab
CML lab file · EVE-NG lab file
4 nodes. The lab boots already broken (the faults are in the start-up configs, so skip Break it). CML: Import a lab, then start it. EVE-NG: import the .unl from the lab list; if your image folder names differ, edit each node's image.
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