packet size issue

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packet size issue

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Hi All,

Noticed unable to ping packet size above 996 after upgrading to PAN OS 5.

few of our internet apps(cloud) is acting intermittently

Anyone encountering the same issue?

Any advice is appreciated?


> ping size 995 source host

PING ( from : 995(1023) bytes of data.

72 bytes from ( icmp_seq=1 ttl=42 (truncated)

72 bytes from ( icmp_seq=2 ttl=42 (truncated)

72 bytes from ( icmp_seq=3 ttl=42 (truncated)

72 bytes from ( icmp_seq=4 ttl=42 (truncated)

72 bytes from ( icmp_seq=5 ttl=42 (truncated)

> ping size 996 source host

PING ( from : 996(1024) bytes of data.


--- ping statistics ---

10 packets transmitted, 0 received, 100% packet loss, time 9014ms


L4 Transporter

Hi ateo,

maybe the mtu-size is to small (default = 1500 byte). you can change the mtu-size if you look at an interface.


Keep in mind that every other involved network-device could be a reason for  the mtu-size. There are different tools to find the right size if this is the problem.

Regards Klaus

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