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Cisco Bug: CSCvs09298 - Decrease vEdge Netflow Export MTU to 1400

Last Modified

Apr 22, 2020

Products (1)

  • Cisco vEdge Router

Known Affected Releases

18.4

Description (partial)

Symptom:
It has been noticed that large netflow packets (~ 1476 bytes) when exported via SDWAN tunnels built over Ethernet interface normally with MTU of 1500 bytes need fragmentation as SDWAN tunnels supports MTU < 1500 bytes(due to IPSec overhead). These fragmented packets may be dropped by firewall.

Conditions:
Netflow feature is in use, with reduced MTU
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