Sim 09: Flexible NetFlow and IP SLA Tracking¶
Blueprint 4.2, 4.4 · Difficulty: Medium · Time target: 20 minutes
R1 is a branch router with a primary link to ISP1 and a backup link to ISP2. Today the primary default route stays in the table even when ISP1 stops forwarding, because the Ethernet link stays up. Fix the failover with IP SLA and object tracking, then send flow records for the LAN to the collector.
Download the lab
CML lab file · EVE-NG lab file
5 nodes. The lab boots in its starting configuration. 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.
Topology¶
graph LR
H1["HOST1<br/>10.10.10.10"]
R1["R1<br/>C8000v"]
ISP1["ISP1<br/>Lo0 192.0.2.1/32"]
ISP2["ISP2"]
COL["COLLECTOR<br/>192.168.100.50"]
H1 -- "10.10.10.0/24 - Gi4 .1" --- R1
R1 -- "Gi1 .2 - 203.0.113.0/30 - Gi0/0 .1<br/>primary" --- ISP1
R1 -- "Gi2 .2 - 198.51.100.0/30 - Gi0/0 .1<br/>backup" --- ISP2
R1 -- "Gi3 .1 - 192.168.100.0/24" --- COL| Node | CML image |
|---|---|
| R1 | Catalyst 8000v |
| ISP1, ISP2 | IOSv |
| HOST1 | Alpine or Ubuntu (or IOSv with no ip routing) |
| COLLECTOR | Ubuntu (any NetFlow v9 collector, or just tcpdump) |
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