packet size issue

[ateo]

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?

Thanks.

> ping size 995 source 172.21.194.22 host google.com

PING google.com (74.125.226.14) from 172.21.194.22 : 995(1023) bytes of data.

72 bytes from lga15s42-in-f14.1e100.net (74.125.226.14): icmp_seq=1 ttl=42 (truncated)

72 bytes from lga15s42-in-f14.1e100.net (74.125.226.14): icmp_seq=2 ttl=42 (truncated)

72 bytes from lga15s42-in-f14.1e100.net (74.125.226.14): icmp_seq=3 ttl=42 (truncated)

72 bytes from lga15s42-in-f14.1e100.net (74.125.226.14): icmp_seq=4 ttl=42 (truncated)

72 bytes from lga15s42-in-f14.1e100.net (74.125.226.14): icmp_seq=5 ttl=42 (truncated)

> ping size 996 source 172.21.194.22 host google.com

PING google.com (74.125.226.1) from 172.21.194.22 : 996(1024) bytes of data.

^C

--- google.com ping statistics ---

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

[kdd]

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