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Cisco Bug: CSCus86256 - uCode crash when MPLS packet received on LAN side of AppNav intercept

Last Modified

Feb 01, 2017

Products (1)

  • Cisco 4400 Series Integrated Services Routers

Known Affected Releases

15.4(2)S2.1 15.4(3)S1.15 15.5(1)S 15.5(2)S

Description (partial)

Router may experience a crash in CPP microcode (uCode) and will subsequently reload.

This has been seen in ISR 4000 based AppNav deployments with AppNav interception ('service-injection waas') enabled on one or more interfaces. It is also necessary to have MPLS enabled on one or more interfaces.

The crash is known to occur when the router receives a labelled packet on any ingress interface and then forwards it (with a label still attached) out an interface with AppNav interception enabled.
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