Добрый день!
Может кто сталкивался с проблемой.
Коммутатор - DGS-1210-28/ME.
System Boot Version : 1.00.023
System Firmware Version : 6.14.B067
System Hardware Version : A2
Присутствует проблема с пропусканием пакетов размера выше 500.

Ping из Windows:

ping 192.168.251.8 -l 504

Pinging 192.168.251.8 with 500 bytes of data:
Reply from 192.168.251.8: bytes=500 time<1ms TTL=62
Reply from 192.168.251.8: bytes=500 time<1ms TTL=62

Ping statistics for 192.168.251.8:
Packets: Sent = 2, Received = 2, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 0ms, Maximum = 0ms, Average = 0ms

ping 192.168.251.8 -l 505

Pinging 192.168.251.8 with 505 bytes of data:
Request timed out.
Request timed out.
Request timed out.
Request timed out.

Ping statistics for 192.168.251.8:
Packets: Sent = 4, Received = 0, Lost = 4 (100% loss),

Создаю на коммутаторе IP interface в этом-же VLAN
create ipif "SAN" 192.168.251.14/28 Pivate_SAN state enable

Ping с коммутатора:

ping 192.168.251.8 size 500
Command: ping 192.168.251.8 size 500


--- 192.168.251.8 Ping Statistics ---
0 Packets Transmitted, 0 Packets Received, 0% Packets Loss
L2AG-1210-SRV-PUSH:5# ping 192.168.251.8 size 465
Command: ping 192.168.251.8 size 465

Reply Received From :192.168.251.8, TimeTaken : <1 msecs
Reply Received From :192.168.251.8, TimeTaken : <1 msecs
Reply Received From :192.168.251.8, TimeTaken : <1 msecs
Reply Received From :192.168.251.8, TimeTaken : <1 msecs

--- 192.168.251.8 Ping Statistics ---
4 Packets Transmitted, 4 Packets Received, 0% Packets Loss

ping 192.168.251.8 size 466
Command: ping 192.168.251.8 size 466

Reply Not Received From : 192.168.251.8, Timeout : 5 secs
Reply Not Received From : 192.168.251.8, Timeout : 5 secs

--- 192.168.251.8 Ping Statistics ---
2 Packets Transmitted, 0 Packets Received, 100% Packets Loss

Думаю, может проблема в оконечном устройстве. Проверяю Ping до шлюза этой сети.
Ping из Windows:

ping 192.168.251.1 -l 1472

Pinging 192.168.251.1 with 1472 bytes of data:
Reply from 192.168.251.1: bytes=1472 time=15ms TTL=254
Reply from 192.168.251.1: bytes=1472 time=16ms TTL=254
Reply from 192.168.251.1: bytes=1472 time=12ms TTL=254

Ping statistics for 192.168.251.1:
Packets: Sent = 3, Received = 3, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 12ms, Maximum = 16ms, Average = 14ms

Ping с коммутатора:

ping 192.168.251.1 siz 465
Command: ping 192.168.251.1 size 465

Reply Received From :192.168.251.1, TimeTaken : 40 msecs
Reply Received From :192.168.251.1, TimeTaken : 20 msecs
Reply Received From :192.168.251.1, TimeTaken : 20 msecs
Reply Received From :192.168.251.1, TimeTaken : 20 msecs

--- 192.168.251.1 Ping Statistics ---
4 Packets Transmitted, 4 Packets Received, 0% Packets Loss

ping 192.168.251.1 siz 466
Command: ping 192.168.251.1 size 466

Reply Not Received From : 192.168.251.1, Timeout : 5 secs
Reply Not Received From : 192.168.251.1, Timeout : 5 secs

--- 192.168.251.1 Ping Statistics ---
2 Packets Transmitted, 0 Packets Received, 100% Packets Loss

Все-таки вина коммутатора.


Вообще мне нужно чтобы коммутатор пропускал jumbo-frame, так как используется для подключения NAS к серверу.
Включать и выключать jumbo-frame пробовал, эффекта не дает.