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6. NS1 sends the request data in IP fragments to S1. The size of each IP fragment is either equal or less than the MTU
(9000) of the interface 10/2, from which NS1 sends these fragments to S1. The IP packets are sourced with a SNIP
address of NS1.
Size of the first IP fragment = [IP header + UDP header + SIP data segment] = [20 + 8 + 8972] = 9000
Size of the second IP fragment = [IP header + SIP data segment] = [20 + 8980] = 9000
Size of the last IP fragment=[IP header + SIP data segment] = [20 + 2048] = 2068
Following is the traffic flow of S1's response to CL1 in this example:
1. Server S1 creates a 30000-byte SIP response to send to the SNIP address of NS1.
2. S1 sends the response data in IP fragments to NS1. The size of each IP fragment is either equal to or less than the MTU
(9000) set on the interface from which S1 sends these fragments to NS1.
Size of the first IP fragment = [IP header + UDP header + SIP data segment] = [20 + 8 + 8972] = 9000
Size of the second and third IP fragment = [IP header + SIP data segment] = [20 + 8980] = 9000
Size of the last IP fragment=[IP header + SIP data segment] = [20 + 3068] = 3088
3. NS1 receives the response IP fragments at interface 10/2. NS1 accepts these fragments, because the size of each
fragment is equal to or less than the MTU (9000) of interface 10/2.
4. NS1 reassembles these IP fragments to form the 27000-byte SIP response. NS1 processes this response.
5. NS1 sends the response data in IP fragments to CL1. The size of each IP fragment is either equal or less than the MTU
(9000) of the interface 10/1, from which NS1 sends these fragments to CL1. The IP fragments are sourced with LBVS-1’s
IP address. These IP packets are sourced from LBVS-1’s IP address and destined to CL1’s IP address.
Size of the first IP fragment = [IP header + UDP header + SIP data segment] = [20 + 8 + 8972] = 9000
Size of the second and third IP fragment = [IP header + SIP data segment] = [20 + 8980] = 9000
Size of the last IP fragment=[IP header + SIP data segment] = [20 + 3068] = 3088
Configuration Tasks
On the NetScaler SDX Management Service, navigate to Configuration > System > Interfaces page. Select the required
interface and click Edit. Set the MTU value and click OK.
Example
Set the MTU value for interface 10/1 as 9000 and for interface 10/2 as 9000.
Log on to NetScaler instance and use the NetScaler command line interface to complete the remaining configuration
steps.
The following table list the tasks, NetScaler commands, and examples for creating the required configuration on the
NetScaler instances.
Tasks NetScaler Command Syntax Examples
Create VLANs and set the MTU of the desired
VLANs for supporting jumbo frames.
add vlan <id> -mtu
<positive_integer>
show vlan <id>
add vlan 10 -mtu 9000
add vlan 20 -mtu 9000
Bind interfaces to VLANs. bind vlan <id> -ifnum
<interface_name>
bind vlan 10 -ifnum 10/1
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