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Traffic routes out of the wrong interface after updating an SMB image with ISP redundancy configured Technical Level
Symptoms
  • Traffic does not route out of the correct interface as per ISP advanced configuration use as default route. The issue does not occur if the user disables this on one of the ISP redundancy configured links.

Cause
A routing priority change occurred between versions:
  • Non-Working Build: R77.20.87 Build 990173004
  • Working Build: R77.20.87 Build 990172960
The following is an example of test output when the WAN and the DMZ interface both participate in ISP redundancy:

[vs_0][fw_0] DMZ:o[84]: 2.2.2.2 -> 1.1.1.1 (ICMP) len=84 id=8119
ICMP: type=8 code=0 echo request id=23908 seq=1276
[vs_0][fw_0] WAN:O[84]: 2.2.2.2 -> 1.1.1.1 (ICMP) len=84 id=8119
ICMP: type=8 code=0 echo request id=23908 seq=1276

If you disable ISP redundancy on the DMZ interface and on the FW Monitor, the traffic starts to correctly go out though the DMZ interface:

[vs_0][fw_0] DMZ:o[84]: 2.2.2.2 -> 1.1.1.1 (ICMP) len=84 id=8235
ICMP: type=8 code=0 echo request id=23908 seq=1392
[vs_0][fw_0] DMZ:O[84]: 2.2.2.2 -> 1.1.1.1 (ICMP) len=84 id=8235
ICMP: type=8 code=0 echo request id=23908 seq=1392


Solution
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