BugZero | Cisco BugID CSCvx94798 - SDWAN BFD is not re-establishing after network fla...

Cisco - Defect ID: CSCvx94798

SDWAN BFD is not re-establishing after network flap

Cisco - Defect ID: CSCvx94798

SDWAN BFD is not re-establishing after network flap

Last updated on February 20th, 2026

BugZero Risk Score
9.5 High

Overall: 9.5

Severity: 10.0

Lifecycle: 9.1

Popularity: 5.1

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Bug Details

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Description

Symptom

SDWAN BFD is not re-establishing after network flap.

Conditions

whenever network flap for any reason which break the control connetions and bfd session , bfd session doesnt re-established once network restored.

Workaround

clear control connections on the branch routers where BFD is down

Further Problem Description

#show platform packet-trace summary Pkt Input Output State Reason 0 Gi0/0/1 Tu1 DROP 319 (BFDoffload) 1 Gi0/0/1 Tu1 DROP 319 (BFDoffload) 2 Gi0/0/1 Tu1 DROP 319 (BFDoffload) 3 Gi0/0/1 Tu1 DROP 319 (BFDoffload) 4 Gi0/0/1 Tu1 DROP 319 (BFDoffload) 5 Gi0/0/1 Tu1 DROP 319 (BFDoffload) 6 Gi0/0/1 Tu1 DROP 319 (BFDoffload) 7 Gi0/0/1 Tu1 DROP 319 (BFDoffload)

Change history

2025-09-26 Added: 17.10.1, 17.10.1a, 17.10.1b, 17.11.1, 17.11.1a, 17.12.02a, 17.12.1, 17.12.1w, 17.12.1x, 17.12.2, 17.12.2a, 17.12.3, 17.13.1, 17.13.1a, 17.14.1, 17.3.4, 17.3.4a, 17.3.4b, 17.3.4c, 17.3.5, 17.3.5a, 17.3.5b, 17.3.6, 17.3.7, 17.3.8, 17.3.8a, 17.4.2, 17.4.2a, 17.6.1, 17.6.1a, 17.6.1w, 17.6.1x, 17.6.1y, 17.6.1z, 17.6.1z1, 17.6.2, 17.6.3, 17.6.3a, 17.6.4, 17.6.5, 17.6.5a, 17.6.6, 17.6.6a, 17.6.7, 17.7.1, 17.7.1a, 17.7.1b, 17.7.2, 17.8.1, 17.8.1a, 17.9.1, 17.9.1a, 17.9.1w, 17.9.1x, 17.9.1x1, 17.9.1y, 17.9.1y1, 17.9.2, 17.9.2a, 17.9.3, 17.9.3a, 17.9.4, 17.9.4a, 17.9.5, 17.9.5a, 17.9.5b

Relevant Products

Click on a version to see all relevant bugs

Affected versions:No known affected versions

Fixed versions: 17.10.1, 17.10.1a, 17.10.1b, 17.11.1, 17.11.1a, 17.12.02a, 17.12.1, 17.12.1w, 17.12.1x, 17.12.2, 17.12.2a, 17.12.3, 17.13.1, 17.13.1a, 17.14.1, 17.3.4, 17.3.4a, 17.3.4b, 17.3.4c, 17.3.5, 17.3.5a, 17.3.5b, 17.3.6, 17.3.7, 17.3.8, 17.3.8a, 17.4.2, 17.4.2a, 17.6.1, 17.6.1a, 17.6.1w, 17.6.1x, 17.6.1y, 17.6.1z, 17.6.1z1, 17.6.2, 17.6.3, 17.6.3a, 17.6.4, 17.6.5, 17.6.5a, 17.6.6, 17.6.6a, 17.6.7, 17.7.1, 17.7.1a, 17.7.1b, 17.7.2, 17.8.1, 17.8.1a, 17.9.1, 17.9.1a, 17.9.1w, 17.9.1x, 17.9.1x1, 17.9.1y, 17.9.1y1, 17.9.2, 17.9.2a, 17.9.3, 17.9.3a, 17.9.4, 17.9.4a, 17.9.5, 17.9.5a, 17.9.5b

Relevant Products

Click on a version to see all relevant bugs

Affected versions:No known affected versions

Fixed versions: 17.10.1, 17.10.1a, 17.10.1b, 17.11.1, 17.11.1a, 17.12.02a, 17.12.1, 17.12.1w, 17.12.1x, 17.12.2, 17.12.2a, 17.12.3, 17.13.1, 17.13.1a, 17.14.1, 17.3.4, 17.3.4a, 17.3.4b, 17.3.4c, 17.3.5, 17.3.5a, 17.3.5b, 17.3.6, 17.3.7, 17.3.8, 17.3.8a, 17.4.2, 17.4.2a, 17.6.1, 17.6.1a, 17.6.1w, 17.6.1x, 17.6.1y, 17.6.1z, 17.6.1z1, 17.6.2, 17.6.3, 17.6.3a, 17.6.4, 17.6.5, 17.6.5a, 17.6.6, 17.6.6a, 17.6.7, 17.7.1, 17.7.1a, 17.7.1b, 17.7.2, 17.8.1, 17.8.1a, 17.9.1, 17.9.1a, 17.9.1w, 17.9.1x, 17.9.1x1, 17.9.1y, 17.9.1y1, 17.9.2, 17.9.2a, 17.9.3, 17.9.3a, 17.9.4, 17.9.4a, 17.9.5, 17.9.5a, 17.9.5b

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Cisco - Defect ID: CSCvx94798

SDWAN BFD is not re-establishing after network flap

Cisco - Defect ID: CSCvx94798

SDWAN BFD is not re-establishing after network flap

Last updated on February 20th, 2026

BugZero Risk Score9.5 High

Bug Details

Symptom

Conditions

Workaround

Further Problem Description

Top Cisco Defects

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BugZero Risk Score
9.5 High