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Cisco Bug: CSCvv73691 - PMTU Discovery may negotiate an incorrect MTU on XE SDWAN routers

Last Modified

Oct 06, 2020

Products (1)

  • Cisco XE SD-WAN Routers

Known Affected Releases


Description (partial)

PMTUD may incorrectly negotiate a MTU value lower than the true PMTU on XE SDWAN routers.

PMTU Discovery is enabled on a XE SDWAN router TLOC with a tunnel established to another endpoint.
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