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NS1- SERVERS-JUMBO
Save the configuration save ns config
show ns config
Tasks NetScaler Command Line
Syntax
Example
Use Case: Coexistence of Jumbo and Non-Jumbo flows on Same Set of Interfaces
Updated: 2015-04-14
Consider an example in which load balancing virtual servers LBVS1 and LBVS2 are configured on NetScaler instance NS1.
LBVS1 is used to load balance HTTP traffic across servers S1 and S2, and global is used to load balance traffic across servers
S3 and S4.
CL1 is on VLAN 10, S1 and S2 are on VLAN20, CL2 is on VLAN 30, and S3 and S4 are on VLAN 40. VLAN 10 and VLAN 20
support jumbo frames, and VLAN 30 and VLAN 40 support only non-jumbo frames.
In other words, the connection between CL1 and NS1, and the connection between NS1 and server S1 or S2 support jumbo
frames. T he connection between CL2 and NS1, and the connection between NS1 and server S3 or S4 support only non-
jumbo frames.
Interface 10/1 of NS1 receives or sends traffic from or to clients. Interface 10/2 of NS1 receives or sends traffic from or to
the servers.
Interface 10/1 is bound to both VLAN 10 and VLAN 20 as a tagged interface, and interface 10/2 is bound to both VLAN 30
and VLAN 40 as a tagged interface.
For supporting jumbo frames, the MTU is set to 9216 for interfaces 10/1 and 10/2.
On NS1, the MTU is set to 9000 for VLAN 10 and VLAN 30 for supporting jumbo frames, and the MTU is set to the default
value of 1500 for VLAN 20 and VLAN 40 for supporting only non-jumbo frames.
The effective MTU on a NetScaler interface for VLAN tagged packets is of the MTU of the interface or the MTU of the
VLAN, whichever is lower. For example:
The MTU of interface 10/1 is 9216. The MTU of VLAN 10 is 9000. On interface 10/1, the MTU of VLAN 10 tagged
packets is 9000.
The MTU of interface 10/2 is 9216. The MT U of VLAN 20 is 9000. On interface 10/2, the MTU of VLAN 20 tagged
packets is 9000.
The MTU of interface 10/1 is 9216. The MTU of VLAN 30 is 1500. On interface 10/1, the MTU of VLAN 30 tagged
packets is 1500.
The MTU of interface 10/2 is 9216. The MT U of VLAN 40 is 1500. On interface 10/2, the MTU of VLAN 40 tagged
packets is 9000.
CL1, S1, S2, and all network devices between CL1 and S1 or S2 are configured for jumbo frames.
Since HTTP traffic is based on TCP, MSSs are set accordingly at each end point for supporting jumbo frames.
For the connection between CL1 and virtual server LBVS-1 of NS1, the MSS on NS1 is set in a TCP profile, which is then
bound to LBVS1.
For the connection between a SNIP address of NS1 and S1, the MSS on NS1 is set in a TCP profile, which is then bound
to the service (SVC-S1) representing S1 on NS1.
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