Change an interface description¶
Case 5 of the Network Change Verdict Corpus. Category: hygiene. Expected verdict: safe (an experienced operator would approve it).
Why it is expected safe¶
Cosmetic change. Must never be blocked.
The config change¶
Against the FRR configs of the base lab:
--- a/pe1.conf
+++ b/pe1.conf
@@ -9,7 +9,7 @@
ip address 10.0.1.1/30
!
interface eth2
- description to-upstream-up1
+ description to-upstream-up1 (transit, CHG-1042)
ip address 10.0.2.1/30
!
interface eth3
What each strategy said¶
The expected verdict was committed to git before any run. All three strategies tested the same running lab (method).
| Strategy | Verdict | Result | Checks that failed |
|---|---|---|---|
| Ping only | safe | ✅ | none |
| All BGP sessions up | safe | ✅ | none |
| Netdryrun intent checks | safe | ✅ | none |
What Netdryrun flagged¶
Nothing: every check in the intent spec passed, so Netdryrun called the change safe.
Reproduce it¶
On Linux or WSL2 with Docker and containerlab, from a checkout of the repository:
Case file: corpus/cases/05-description-only.yml. Published result: netdryrun 0.2.0, containerlab 0.81.1, FRR quay.io/frrouting/frr:10.4.1, commit ec23379, run on 2026-10-26.