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Cisco Bug: CSCvu26692 - NBAR doing wrong identification of L7 Google-earth and Hangouts

Last Modified

Sep 10, 2020

Products (1)

  • Cisco XE SD-WAN Routers

Known Affected Releases

17.2.1r

Description (partial)

Symptom:
Google-Earth and Hangout are not getting detected when traffic is passing through cEdge device

Conditions:
BR3-cEdge-1_Template#show ip nbar protocol-id | in earth
google-earth                                          441           L7 STANDARD

BR3-cEdge-1_Template#show ip nbar protocol-id | in hangout
hangouts                                              1087          L7 STANDARD
hangouts-audio                                        1090          L7 STANDARD
hangouts-chat                                         1091          L7 STANDARD
hangouts-file-transfer                                1092          L7 STANDARD
hangouts-media                                        1088          L7 STANDARD
hangouts-video                                        1089          L7 STANDARD

BR3-cEdge-1_Template#show ip nbar protocol-id | in 520
google-services                                       520           L7 STANDARD
rip                                                   520           L4 IANA


FIA trace:

On FIA trace, protocol id is getting detected as 520, which is for google-services, instead of 441 (google-earth) or hangout

 Feature: NBAR
    Packet number in flow: 1
    Classification state: Not final
    Classification name: google-services
    Classification ID: [CANA-L7:520]
    Classification source: Unknown
    Number of matched sub-classifications: 0
    Number of extracted fields: 0
    Is PA (split) packet: False
    TPH-MQC bitmask value: 0x0
    Is optimize packet: False
    Is allow packet: False
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