JumboFrames on cisco3750g for iSCSI traffic

[e2andreas]

Hello Communality,

I need you help!

here is the goal: connect SAN and vmware ESXi by iSCSI via cisco3750g.

on cisco I'm using a separated vlan for iSCSI traffic.

So after turning on the JumboFrames on cisco ( system mtu jumbo 9000 > reload) I was trying to test it using PING command from the switch without success :-(

#show system mtu

System MTU size is 1500 bytes
System Jumbo MTU size is 9000 bytes
System Alternate MTU size is 1500 bytes
Routing MTU size is 1500 bytes

#ping 192.168.0.21 size 9000 df-bit repeat 1

Type escape sequence to abort.
Sending 1, 9000-byte ICMP Echos to 192.168.0.21, timeout is 2 seconds:
Packet sent with the DF bit set
.
Success rate is 0 percent (0/1)

#show int gi1/0/3 mtu

Port      Name               MTU
Gi1/0/3   iSCSI              9000     

#show vlan mtu

VLAN    SVI_MTU    MinMTU(port)      MaxMTU(port)     MTU_Mismatch
---- ------------- ----------------  ---------------  ------------
1    1500          9000              9000              No

192   1500          9000              9000              No

#show ru int gi1/0/3                        
Building configuration...

Current configuration : 108 bytes
!
interface GigabitEthernet1/0/3
 description iSCSI
 switchport access vlan192
 switchport mode access
end

thanks!

[paul driver]

Hello

Did you reload the switch?


res

Paul

[e2andreas]

sure! I did reload the switch after MTU set to 9000

[paul driver]

Hello

Does the interface need to be an access port or trunk?

res

Paul

[e2andreas]

it's only an access port

[rsblind01]

Did you ever find the answer to this question?

Thanks

RS