Has anyone else noticed an issue on SRX devices where the hello packets are sometimes 56 bytes instead of 60? Here is a tcpdump:
11:20:05.549433 In IP 192.168.216.29 > 224.0.0.5: OSPFv2, Hello, length 56
11:20:05.767757 Out IP 192.168.215.30 > 224.0.0.5: OSPFv2, Hello, length 60
11:20:06.384321 In IP 192.168.216.29 > 224.0.0.5: OSPFv2, Hello, length 56
11:20:06.586991 Out IP 192.168.215.30 > 224.0.0.5: OSPFv2, Hello, length 60
11:20:07.324418 In IP 192.168.216.29 > 224.0.0.5: OSPFv2, Hello, length 56
11:20:07.574520 Out IP 192.168.215.30 > 224.0.0.5: OSPFv2, Hello, length 60
I have seen this in my environment many times. I have seen this on 19.2r2.7 and 21.3r1. SRX models 300 and 380. Both in cluster mode and standalone. Is this a known bug? Would love to see information on this issue and possible resolution steps.
On one SRX I was able to reboot the device which fixed the issue. The neighborship was in FULL state and when I ran a tcpdump, the inbound Hello packets showed length 60. But on another SRX, rebooting did not work and we still aren't sure how to fix this.
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CHRISTIAN DE LA PENA
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