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Cisco Bug: CSCvv41873 - Cisco 8000 series Modular LC: ISIS sessions will not come up when Interface MTU is > 9974

Last Modified

Oct 13, 2020

Products (1)

  • Cisco 8000 Series Routers

Known Affected Releases

7.0.11.BASE 7.0.12.BASE 7.0.14.BASE 7.2.1.BASE 7.3.1.BASE SDK-1.30.0

Description (partial)

Release-note

Symptom:
ISIS sessions on Cisco 8800 Series Distributed system LC will not come up when the Interface MTU is more than 9974 bytes.

Conditions:
Interface MTU is > 9974
Cisco IOS-XR version 7.0.11, 7.0.12, 7.0.14, 7.2.1, 7.2.12, 7.2.2, 7.3.1
ISIS hello padding is enabled (which is the default option)
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Bug Details Include

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