Cisco Bug: CSCtd03798 - 7300 PXF corrupting IP header checksum during Egress QoS
Feb 22, 2014
- Cisco 7300 Series Routers
Known Affected Releases
Symptoms: In an MPLS VPN, when a Cisco 7300 series router is being used as a PE, some prefixes lose reachability. The packet capture between PE and CE shows that the header checksum is incorrect: Protocol: ICMP (0x01) Header checksum: 0x93a8 (should be 0x9308) Conditions: The symptom is observed under the following conditions: - An MPLS VPN where a Cisco 7300 series router is being used as PE with NSE-100. - Both ingress and egress interfaces must be link ethernet interface (SPA/PA gigE or FE). - Egress interface towards CE must contain QoS marking and it should be a dot1q interface.
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